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Contents

ALEPH_1991_S2435284

Hadronic Z decay charged multiplicity measurement
Experiment: ALEPH (LEP 1)
Inspire ID: 319520
Status: VALIDATED
Authors:
  • Andy Buckley
References:
  • Phys. Lett. B, 273, 181 (1991)
Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV)

The charged particle multiplicity distribution of hadronic Z decays, as measured on the peak of the Z resonance using the ALEPH detector at LEP. The unfolding procedure was model independent, and the distribution was found to have a mean of $20.85 \pm 0.24$, Comparison with lower energy data supports the KNO scaling hypothesis. The shape of the multiplicity distribution is well described by a log-normal distribution, as predicted from a cascading model for multi-particle production.

ALEPH_1995_I382179

Inclusive pi+-, K+- and (p, anti-p) differential cross-sections at the Z resonance
Experiment: ALEPH (LEP)
Inspire ID: 382179
Status: VALIDATED
Authors:
  • Simone Amoroso
References: Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • e+e- production at the Z-peak with hadronic decays

Inclusive spectra of pions, Kaons, protons and antiprotons in hadronic decays of the Z0 measured as a function of z.

ALEPH_1996_S3196992

Measurement of the quark to photon fragmentation function
Experiment: ALEPH (LEP Run 1)
Inspire ID: 398193
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • $e^+e^-\to$ jets with $\pi$ and $\eta$ decays turned off.

Earlier measurements at LEP of isolated hard photons in hadronic Z decays, attributed to radiation from primary quark pairs, have been extended in the ALEPH experiment to include hard photon production inside hadron jets. Events are selected where all particles combine democratically to form hadron jets, one of which contains a photon with a fractional energy $z > 0.7$. After statistical subtraction of non-prompt photons, the quark-to-photon fragmentation function, $D(z)$, is extracted directly from the measured 2-jet rate.

ALEPH_1996_S3486095

Studies of QCD with the ALEPH detector.
Experiment: ALEPH (LEP 1)
Inspire ID: 428072
Status: VALIDATED
Authors:
  • Holger Schulz
References:
  • Phys. Rept., 294, 1--165 (1998)
Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV)

Summary paper of QCD results as measured by ALEPH at LEP 1. The publication includes various event shape variables, multiplicities (identified particles and inclusive), and particle spectra.

ALEPH_1999_S4193598

Scaled energy distribution of $D^*$ at LEP
Experiment: ALEPH (LEP)
Inspire ID: 507422
Status: VALIDATED
Authors:
  • Holger Schulz
References:
  • Eur.Phys.J.C16:597-611,2000
  • hep-ex/9909032
  • CERN-EP-99-094
Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic $Z$ decays at 91.2\;GeV.

Study of charm production in $Z$ decays. Here, only the scaled energy distribution of $D^{*\pm}$ is implemented. Should be very important for fragmentation tuning.

ALEPH_2001_S4656318

Study of the fragmentation of b quarks into B mesons at the Z peak
Experiment: ALEPH (LEP 1)
Inspire ID: 558327
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Phys.Lett.B512:30-48,2001.
  • hep-ex/0106051
Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV)

Measurement of the $b$-quark fragmentation function by ALEPH using LEP 1 data. The fragmentation function for both weakly decaying and leading $b$-quarks has been determined. The data used for the plots has been renormalised to give a differential distribution rather than the bin-by-bin average in HEPDATA.

ALEPH_2002_S4823664

$\eta$ and $\omega$ Production in Hadronic $Z^0$ Decays
Experiment: OPAL (LEP 1)
Inspire ID: 569165
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Phys.Lett. B528 (2002) 19-33
  • hep-ex/0201012
Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV)

The production of $\eta$ and $\omega$ mesons measured using 4 millon $Z^0$ events by the ALEPH experiment at LEP. Only the fragmentation functions are implemented.

ALEPH_2004_S5765862

Jet rates and event shapes at LEP I and II
Experiment: ALEPH (LEP Run 1 and 2)
Inspire ID: 636645
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: e+ e-
Beam energies: (45.6, 45.6); (66.5, 66.5); (80.5, 80.5); (86.0, 86.0); (91.5, 91.5); (94.5, 94.5); (98.5, 98.5); (100.0, 100.0); (103.0, 103.0) GeV
Run details:
  • $e^+ e^- \to$ jet jet (+ jets)

Jet rates, event-shape variables and inclusive charged particle spectra are measured in $e^+ e^-$ collisions at CMS energies between 91 and 209 GeV. The previously published data at 91.2 GeV and 133 GeV have been re-processed and the higher energy data are presented here for the first time. Note that the data have been corrected to include neutrinos.

ALEPH_2014_I1267648

Normalised spectral functions of hadronic tau decays
Experiment: ALEPH (LEP)
Inspire ID: 1267648
Status: VALIDATED
Authors:
  • Holger Schulz
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • Hadronic tau decays.

Spectral functions of pionic tau decays measured with ALEPH. The data is taken from http://aleph.web.lal.in2p3.fr/tau/specfun.html

ALEPH_2016_I1492968

Dimuon invariant mass in OS and SS channel.
Experiment: ALEPH (LEP)
Inspire ID: 1492968
Status: UNVALIDATED
Authors:
  • Arno Heister
No references listed
Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Z to bbar events, 1M events when running Z to bbar inclusively.

Measurement of the dimuon invariant mass (OS and SS) and related quantities in Z to bbar events with ALEPH archived data.

ALICE_2010_S8624100

Charged particle multiplicities at 0.9 and 2.36\;TeV in three different pseudorapidity intervals
Experiment: ALICE (LHC)
Inspire ID: 852450
Status: VALIDATED
Authors:
  • Holger Schulz
  • Jan Fiete Grosse-Oetringhaus@cern.ch
References:
  • Eur.Phys.J.C68:89-108,2010
  • arXiv: 1004.3034
Beams: p+ p+
Beam energies: (450.0, 450.0); (1180.0, 1180.0) GeV
Run details:
  • QCD and diffractive events at $\sqrt{s} = 0.9\;\text{TeV}$ and $\sqrt{s} = 2.36\;\text{TeV}$

This is an ALICE analysis where charged particle multiplicities (including the zero bin) have been measured in three different pseudorapidity intervals ($|\eta|<0.5; |\eta|<1.0; |\eta|<1.3$. Only the INEL distributions have been considered here, i.e. this analysis can only be meaningfully compared to PYTHIA 6 with diffractive processes disabled. The data were taken at 900 and 2360\;GeV.

ALICE_2010_S8625980

Pseudorapidities at three energies, charged multiplicity at 7 TeV
Experiment: ALICE (LHC)
Inspire ID: 852264
Status: VALIDATED
Authors:
  • Holger Schulz
  • Jan Fiete Grosse-Oetringhaus@cern.ch
References:
  • Eur.Phys.J. C68 (2010) 345-354
  • arXiv: 1004.3514
Beams: p+ p+
Beam energies: (450.0, 450.0); (1180.0, 1180.0); (3500.0, 3500.0) GeV
Run details:
  • Diffractive events need to be enabled.

This is an ALICE publication with pseudorapities for 0.9, 2.36 and $7\;\text{TeV}$ and the charged multiplicity at $7\;\text{TeV}$. The analysis requires at least on charged particle in the event. Only the INEL distributions are considered here

ALICE_2010_S8706239

Charged particle $\langle p_\perp \rangle$ vs. $N_\text{ch}$ in $pp$ collisions at 900 GeV
Experiment: ALICE (LHC)
Inspire ID: 860416
Status: VALIDATED
Authors:
  • Holger Schulz
  • Jan Fiete Grosse-Oetringhaus@cern.ch
References: Beams: p+ p+
Beam energies: (450.0, 450.0) GeV
Run details:
  • Diffractive events need to be switched on

ALICE measurement of $\langle p_\perp \rangle$ vs. $N_\text{ch}$ and invariant particle yield (as function of $p_\perp$) in proton-proton collisions at $\sqrt{s} = 900\;\text{GeV}$.

ALICE_2011_S8909580

Strange particle production in proton-proton collisions at $\sqrt{s} = 0.9$ TeV with ALICE at the LHC.
Experiment: ALICE (LHC)
Inspire ID: 881474
Status: VALIDATED
Authors:
  • Pablo Bueno Gomez
  • Eva Sicking
References:
  • Eur.Phys.J.C71:1594,2011.
Beams: p+ p+
Beam energies: (450.0, 450.0) GeV
Run details:
  • Diffractive events need to be switched on.

Tranverse momentum spectra of strange particles ($K^0_S$, $\Lambda$, $\phi$ and $\Xi$) in $pp$ collisions at $\sqrt{s} = 0.9$\;TeV with ALICE at the LHC. The ratio of cross-sections as a function of pT for $\Lambda/K^0_S$ is also included.

ALICE_2011_S8945144

Transverse momentum spectra of pions, kaons and protons in pp collisions at 0.9 TeV
Experiment: ALICE (LHC)
Inspire ID: 885104
Status: VALIDATED
Authors:
  • Pablo Bueno Gomez
  • Eva Sicking
References: Beams: p+ p+
Beam energies: (450.0, 450.0) GeV
Run details:
  • Diffractive events need to be enabled.

Obtaining the transverse momentum spectra of pions, kaons and protons in $pp$ collisions at $\sqrt{s} = 0.9$ TeV with ALICE at the LHC. Mean transverse momentum as a function of the mass of the emitted particle is also included.

ALICE_2012_I1116147

pT of neutral pions and $\eta$ mesons in $pp$ collisions at $7\,$TeV and $0.9\,$TeV
Experiment: ALICE (LHC)
Inspire ID: 1116147
Status: VALIDATED
Authors:
  • Hendrik Poppenborg hendrik.poppenborg@cern.ch
References: Beams: p+ p+
Beam energies: (450.0, 450.0); (3500.0, 3500.0) GeV
Run details:
  • Generic $pp$ collision events.

Transverse momentum spectra of neutral pions and $\eta$ mesons and the ratio $\pi^0/\eta$, obtained at mid-rapidity in pp collisions at $\sqrt{s} = 7\,$TeV with ALICE at the LHC. The transverse momentum spectrum of neutral pions is also given for $\sqrt{s} = 0.9\,$TeV.

ALICE_2012_I1181770

Measurement of inelastic, single- and double-diffraction cross sections in proton--proton collisions at the LHC with ALICE
Experiment: ALICE (LHC)
Inspire ID: 1181770
Status: VALIDATED
Authors:
  • Martin Poghosyan
  • Sercan Sen
  • Burak Bilki
  • Andy Buckley
References: Beams: p+ p+
Beam energies: (450.0, 450.0); (1380.0, 1380.0); (3500.0, 3500.0) GeV
Run details:
  • Inelastic events (non-diffractive and inelastic diffractive).

Measurements of cross-sections of inelastic and diffractive processes in proton-proton collisions at $\sqrt{s} = 900$, 2760 and 7000 GeV. The fractions of diffractive processes in inelastic collisions were determined from a study of gaps in charged particle pseudorapidity distributions. Single-diffractive events are selected with $M_{X} < 200\;\text{GeV}/c^2$ and double-diffractive events defined as NSD events with $\Delta\eta > 3$. To measure the inelastic cross-section, beam properties were determined with van der Meer scans using a simulation of diffraction adjusted to data. Note that these are experimental approximations to theoretical concepts -- it is not totally clear whether the data point values are model-independent.

ALICE_2014_I1300380

Production of $\Sigma(1385)^{\pm}$ and $\Xi(1530)^{0}$ in proton-proton collisions at $\sqrt{s} =$ 7 TeV
Experiment: ALICE (LHC)
Inspire ID: 1300380
Status: VALIDATED
Authors:
  • Enrico Fragiacomo enrico.fragiacomo@ts.infn.it
  • Andreas Morsch andreas.morsch@cern.ch
No references listed
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • inelastic collisions pp at sqrt(s) = 7 TeV

Transverse momentum spectra $\frac{1}{N_{\rm inel}} \frac{{\rm d}^2N}{{\rm d}p_{\rm T}{\rm d}y}$ of $\Sigma(1385)^{\pm}$, $\overline{\Sigma}(1385)^{\pm}$ and $(\Xi(1530)^{0}+\overline{\Xi}(1530)^{0})/2$ at mid-rapidity ($|y| < 0.5$) in inelastic proton-proton collisions at $\sqrt{s} =$ 7 TeV

ALICE_2015_I1357424

Transverse momentum spectra of pions, kaons and protons in $pp$ collisions at 7 TeV
Experiment: ALICE (LHC)
Inspire ID: 1357424
Status: VALIDATED
Authors:
  • Andreas Morsch andreas.morsch@cern.ch
No references listed
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Inelastic pp collisions at sqrt(s) = 7 TeV

Obtaining the transverse momentum spectra of primary pions, kaons and protons in $pp$ collisions at $\sqrt{s} = 7$ TeV with ALICE at the LHC. K/pi and p/pi ratios are also included.

AMY_1990_I295160

Hadronic charged multiplicity measurement between 50 and 61.4 GeV
Experiment: AMY (TRISTAN)
Inspire ID: 295160
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Phys.Rev. D42 (1990) 737-747
Beams: e+ e-
Beam energies: (25.0, 25.0); (26.0, 26.0); (27.5, 27.5); (28.0, 28.0); (28.5, 28.5); (30.0, 30.0); (30.4, 30.4); (30.7, 30.7); (28.5, 28.5) GeV
Run details:
  • Hadronic e+ e- events generated below the Z pole

The charged particle multiplicity distribution of hadronic $e^+e^-$ events as measured between 50 and 61.4 GeV using the AMY detector at TRISTAN.

ARGUS_1993_S2653028

Inclusive production of charged pions, kaons and protons in $\Upsilon(4S)$ decays.
Experiment: ()
Inspire ID: 340894
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Z.Phys. C58 (1993) 191-198
Beams: e+ e-
Beam energies: (5.3, 5.3) GeV
Run details:
  • $e^+ e^-$ analysis on the $\Upsilon(4S)$ resonance.

Measurement of inclusive production of charged pions, kaons and protons from $\Upsilon(4S)$ decays. Kaon spectra are determined in two different ways using particle identification and detecting decays in-flight. Results are background continuum subtracted. This analysis is useful for tuning $B$ meson decay modes.

ARGUS_1993_S2669951

Production of the $\eta'(958)$ and $f_0(980)$ in $e^+e^-$ annihilation in the Upsilon region.
Experiment: ()
Inspire ID: 342061
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Z.Phys. C58 (1993) 199-206
Beams: e+ e-
Beam energies: (4.7, 4.7); (5.0, 5.0); (5.2, 5.2) GeV
Run details:
  • $e^+ e^-$ analysis near the $\Upsilon(4S)$ resonance.

Measurement of the inclusive production of the $\eta'(958)$ and $f_0(980)$ mesons in $e^+e^-$ annihilation in the Upsilon region. Data are taken on the $\Upsilon(1S)$, $\Upsilon(2S)$ and $\Upsilon(4S)$ resonances and in the nearby continuum (9.36 to 10.45 GeV center-of-mass energy)

ARGUS_1993_S2789213

Inclusive production of $K^*(892)$, $\rho^0(770)$, and $\omega(783)$ mesons in the upsilon energy region.
Experiment: ()
Inspire ID: 356616
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Z.Phys. C61 (1994) 1-18
Beams: e+ e-
Beam energies: (4.7, 4.7); (5.2, 5.2); (5.3, 5.3) GeV
Run details:
  • $e^+ e^-$ analysis in the 10 GeV CMS energy range

Measurement of the inclusive production of the vector mesons $K^*(892)$, $\rho^0(770)$ and $\omega(783)$ in $e^+e^-$ annihilation in the Upsilon region by the Argus Collaboration. Useful for tuning simulations of B meson and bottomium decays.

ATLAS_2010_CONF_2010_049

Cross-section of and fragmentation function in anti-kt track jets
Experiment: ATLAS (LHC 7000GeV)
Spires ID: None
Status: OBSOLETE
Authors:
  • Hendrik Hoeth
References:
  • ATLAS-CONF-2010-049
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • pp QCD interactions at 7000 GeV including diffractive events.

Jets are identified and their properties studied using tracks measured by the ATLAS Inner Detector. Events are selected using a minimum-bias trigger, allowing the emergence of jets at low transverse momentum to be observed and for jets to be studied independently of the calorimeter. Jets are reconstructed using the anti-kt algorithm applied to tracks with two parameter choices, 0.4 and 0.6. An inclusive jet transverse momentum cross section measurement from 4 GeV to 80 GeV is shown, integrated over $|\eta| < 0.57$ and corrected to charged particle-level truth jets. The probability that a particular particle carries a fixed fraction of the jet momentum (fragmentation function) is also measured. All data is corrected to the particle level. ATTENTION - Data read from plots!

ATLAS_2010_I849050

Charged particles at 900 GeV in ATLAS
Experiment: ATLAS (LHC 900GeV)
Inspire ID: 849050
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p+ p+
Beam energies: (450.0, 450.0) GeV
Run details:
  • pp QCD interactions at 900 GeV including diffractive events.

The first measurements with the ATLAS detector at the LHC. Data were collected using a minimum-bias trigger in December 2009 during proton-proton collisions at a centre of mass energy of 900 GeV. The charged- particle density, its dependence on transverse momentum and pseudorapid- ity, and the relationship between transverse momentum and charged-particle multiplicity are measured for events with at least one charged particle in the kinematic range $|\eta| < 2.5$ and $p_\perp > 500$ MeV. All data is corrected to the particle level.

ATLAS_2010_S8591806

Charged particles at 900 GeV in ATLAS
Experiment: ATLAS (LHC 900GeV)
Inspire ID: 849050
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p+ p+
Beam energies: (450.0, 450.0) GeV
Run details:
  • pp QCD interactions at 900 GeV including diffractive events.

The first measurements with the ATLAS detector at the LHC. Data were collected using a minimum-bias trigger in December 2009 during proton-proton collisions at a centre of mass energy of 900 GeV. The charged- particle density, its dependence on transverse momentum and pseudorapid- ity, and the relationship between transverse momentum and charged-particle multiplicity are measured for events with at least one charged particle in the kinematic range $|\eta| < 2.5$ and $p_\perp > 500$ MeV. All data is corrected to the particle level.

ATLAS_2010_S8817804

Inclusive jet cross section and di-jet mass and chi spectra at 7 TeV in ATLAS
Experiment: ATLAS (LHC 7TeV)
Inspire ID: 871366
Status: VALIDATED
Authors:
  • James Monk
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • pp QCD jet production with a minimum jet pT of 60 GeV (inclusive) or 30 GeV (di-jets) at 7 TeV.

The first jet cross section measurement made with the ATLAS detector at the LHC. Anti-kt jets with $R=0.4$ and $R=0.6$ are resconstructed within $|y|<2.8$ and above 60 GeV for the inclusive jet cross section plots. For the di-jet plots the second jet must have pT>30 GeV. Jet pT and di-jet mass spectra are plotted in bins of rapidity between $|y| = $ 0.3, 0.8, 1.2, 2.1, and 2.8. Di-jet $\chi$ spectra are plotted in bins of di-jet mass between 340 GeV, 520 GeV, 800 GeV and 1200 GeV.

ATLAS_2010_S8894728

Track-based underlying event at 900 GeV and 7 TeV in ATLAS
Experiment: ATLAS (LHC)
Inspire ID: 879407
Status: VALIDATED
Authors:
  • Andy Buckley
  • Holger Schulz
References: Beams: p+ p+
Beam energies: (450.0, 450.0); (3500.0, 3500.0) GeV
Run details:
  • pp QCD interactions at 900 GeV and 7 TeV. Diffractive events should be included, but only influence the lowest bins. Multiple kinematic cuts should not be required.

The underlying event measurements with the ATLAS detector at the LHC at the center of mass energies of 900 GeV and 7 TeV. The observables sensitive to the underlying event, i.e the charged particle density and charged pT sum, as well as their standard deviations and the average pT, are measured as functions of the leading track. A track pT cut of 500 MeV is applied for most observables, but the main profile plots are also shown for a lower track cut of 100 MeV, which includes much more of the soft cross-section. The angular distribution of the charged tracks with respect to the leading track is also studied, as are the correlation between mean transverse momentum and charged particle multiplicity, and the `plateau' height as a function of the leading track $|\eta|$.

ATLAS_2010_S8914702

Inclusive isolated prompt photon analysis
Experiment: ATLAS (LHC 7TeV)
Inspire ID: 882463
Status: VALIDATED
Authors:
  • Mike Hance
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Inclusive photon+X events (primary gamma+jet events) at $\sqrt{s} = 7$ TeV.

A measurement of the cross section for inclusive isolated photon production at $\sqrt{s} = 7$ TeV. The measurement covers three ranges in $|\eta|$: [0.00,0.60), [0.60,1.37), and [1.52,1.81), for $E_T^\gamma>15$ GeV. The measurement uses 880 nb$^{-1}$ of integrated luminosity collected with the ATLAS detector.

ATLAS_2010_S8918562

Track-based minimum bias at 900 GeV and 2.36 and 7 TeV in ATLAS
Experiment: ATLAS (LHC)
Inspire ID: 882098
Status: VALIDATED
Authors:
  • Thomas Burgess
  • Andy Buckley
References: Beams: p+ p+
Beam energies: (450.0, 450.0); (1180.0, 1180.0); (3500.0, 3500.0) GeV
Run details:
  • $pp$ QCD interactions at 0.9, 2.36, and 7 TeV. Diffractive events should be included. Multiple kinematic cuts should not be required.

Measurements from proton-proton collisions at centre-of-mass energies of $\sqrt{s} = 0.9$, 2.36, and 7 TeV recorded with the ATLAS detector at the LHC. Events were collected using a single-arm minimum-bias trigger. The charged-particle multiplicity, its dependence on transverse momentum and pseudorapidity and the relationship between the mean transverse momentum and charged-particle multiplicity are measured. Measurements in different regions of phase-space are shown, providing diffraction-reduced measurements as well as more inclusive ones. The observed distributions are corrected to well-defined phase-space regions, using model-independent corrections.

ATLAS_2010_S8919674

$W$ + jets jet multiplicities and $p_\perp$
Experiment: ATLAS (LHC)
Inspire ID: 882534
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • W+jets events ideally with matrix element corrections to describe the higher jet multiplicities correctly. Both channels, electron and muon, are part of this analysis and should be run simultaneously.

Cross sections, in both the electron and muon decay modes of the W boson, are presented as a function of jet multiplicity and of the transverse momentum of the leading and next-to-leading jets in the event. Measurements are also presented of the ratio of cross sections for inclusive jet multiplicities. The results, based on an integrated luminosity of 1.3 pb-1, have been corrected for all known detector effects and are quoted in a limited and well-defined range of jet and lepton kinematics.

ATLAS_2011_CONF_2011_090

Single lepton search for supersymmetry
Experiment: ATLAS (LHC)
Spires ID: ~
Status: OBSOLETE
Authors:
  • Angela Chen
References:
  • ATLAS-CONF-2011-090
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • BSM signal events at 7000 GeV.

Single lepton search for supersymmmetric particles by ATLAS at 7 TeV. Event counts in electron and muon signal regions are implemented as one-bin histograms. Histograms for missing transverse energy and effective mass are implemented for the two signal regions.

ATLAS_2011_CONF_2011_098

B-jets search for supersymmetry with 0-leptons
Experiment: ATLAS (LHC)
Spires ID: ~
Status: OBSOLETE
Authors:
  • Angela Chen
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • BSM signal events at 7000 GeV.

Search for supersymmmetric particles by ATLAS at 7 TeV in events with b-jets, large missing energy, and no leptons. Event counts in four signal regions (1 b-jet, $m_eff>500$\,GeV; 1 b-jet, $m_eff>700$\,GeV; 2 b-jets, $m_eff>500$\,GeV; 2 b-jets, $m_eff>700$\,GeV) are implemented as one-bin histograms. Histograms for missing transverse energy, effective mass, and pT of the leading jet are implemented for the 1 b-tag and 2 b-tag signal regions.

ATLAS_2011_I894867

Measurement of the inelastic proton-proton cross-section at $\sqrt{s} = $7 TeV.
Experiment: ATLAS (LHC)
Inspire ID: 894867
Status: VALIDATED
Authors:
  • Anton Karneyeu
  • Sercan Sen
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Inelastic events (non-diffractive and inelastic diffractive).

Inelastic cross-section is measured for $\xi > 5 \times 10^{-6}$, where $\xi=M_X^2/s$ is calculated from the invariant mass, $M_X$, of hadrons selected using the largest rapidity gap in the event.

ATLAS_2011_I919017

Measurement of ATLAS track jet properties at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 919017
Status: VALIDATED
Authors:
  • Seth Zenz
  • Andy Buckley
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Min bias QCD at 7 TeV.

ATLAS measurement of track jet pT, multiplicity per jet, longitudinal fragmentation, transverse momentum, radius w.r.t jet axis distributions, with jets constructed from charged tracks with $pT > 300$ MeV, using the anti-$k_T$ jet algorithm with $R = 0.4, 0.6$.

ATLAS_2011_I921594

Inclusive isolated prompt photon analysis with full 2010 LHC data
Experiment: ATLAS (LHC 7TeV)
Inspire ID: 921594
Status: VALIDATED
Authors:
  • Giovanni Marchiori
References:
  • arXiv: 1108.0253
  • Phys.Lett. B706 (2011) 150-167
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Inclusive photon $+ X$ events (primary $\gamma$+jet events) at $\sqrt{s} = 7$ TeV.

A measurement of the differential cross-section for the inclusive production of isolated prompt photons in $pp$ collisions at a center-of-mass energy $\sqrt{s} = 7$ TeV is presented. The measurement covers the pseudorapidity ranges $|\eta|<1.37$ and $1.52<|\eta|<2.37$ in the transverse energy range $45<E_T<400$ GeV. The results are based on an integrated luminosity of 35 pb$^{-1}$, collected with the ATLAS detector at the LHC. The yields of the signal photons are measured using a data-driven technique, based on the observed distribution of the hadronic energy in a narrow cone around the photon candidate and the photon selection criteria. The results are compared with next-to-leading order perturbative QCD calculations and found to be in good agreement over four orders of magnitude in cross-section.

ATLAS_2011_I925932

Measurement of the W pT with electrons and muons at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 925932
Status: VALIDATED
Authors:
  • Elena Yatsenko
  • Judith Katzy
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Run with $W$ decays to $e\,\nu_e$ and/or $\mu\,\nu_\mu$.

The W pT at $\sqrt{s} = 7$\;TeV is measured using $W\to e \, \nu_e$ and $W\to \mu \, \nu_\mu$ decay channels. The dressed leptons kinematics calculated from the sum of the post-FSR lepton momentum and the momenta of all photons radiated in a cone around the lepton, while the bare uses the lepton kinematics after all QED radiation.

ATLAS_2011_I926145

Measurement of electron and muon differential cross-section from heavy-flavour decays
Experiment: ATLAS (LHC)
Inspire ID: 9185208
Status: VALIDATED
Authors:
  • Paul Bell
  • Holger Schulz
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • $pp$ to electron $+ X$ or muon $+ X$ at 7 TeV, heavy-flavour ($bb$ and $cc$) production with $B/D \to e/\mu$

Measurement of inclusive electron and muon cross sections for $7 < p_\perp <26$ GeV in $|\eta| <2.0$, excluding $1.37<|\eta|<1.52$, and muon cross section for $4 < p_\perp < 100$ GeV in $|\eta| <2.50$. The $W/Z/\gamma^*$ component must be subtracted to leave the heavy flavour contribution.

ATLAS_2011_I928289_W

W inclusive cross sections at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 928289
Status: VALIDATED
Authors:
  • Roman Lysak <roman.lysak@cern.ch>, Christian Gutschow
  • Phys.Rev. D85 (2012) 072004
  • doi:10.1103/PhysRevD.85.072004
  • arXiv:1109.5141 [hep-ex]
No references listed
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • p + p -> W + X ( W -> mu nu or e nu ) The histograms include the W charge asymmetry. Note that the charge asymmetry histograms may need to be constructed manually from the individual W^+ and W^- channels if the analysis is run on individual files. A_l = (W^+ - W^-) / (W^+ + W^-)

The production cross sections of the inclusive Drell-Yan process $W^\pm \rightarrow \ell\nu$ ($\ell = e, µ$) are measured in proton-proton collisions at $\sqrt{s} = 7$ TeV with the ATLAS detector. The cross sections are evaluated differentially as a function of the $W$ boson rapidity based on an integrated luminosity of about 35 $\text{pb}^{−1}$ collected in 2010. The cross sections are measured separately for $W^+$ and $W^-$ production, and then used to construct the $W$ charge asymmetry as well.

ATLAS_2011_I928289_Z

Z inclusive cross sections at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 928289
Status: VALIDATED
Authors:
  • Roman Lysak <roman.lysak@cern.ch>, Christian Gutschow
  • Phys.Rev. D85 (2012) 072004
  • doi:10.1103/PhysRevD.85.072004
  • arXiv:1109.5141 [hep-ex]
No references listed
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • p + p -> Z + X ( Z -> mu^+ mu^- or e^+ e^- )

The production cross sections of the inclusive Drell-Yan process $Z/\gamma^\ast \rightarrow \ell\ell$ ($\ell = e, µ$) are measured in proton-proton collisions at $\sqrt{s} = 7$ TeV with the ATLAS detector. The cross sections are evaluated differentially as a function of the $Z$ boson rapidity based on an integrated luminosity of about 35 $\text{pb}^{−1}$ collected in 2010.

ATLAS_2011_I929691

Jet fragmentation at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 929691
Status: VALIDATED
Authors:
  • Stefan von Buddenbrock
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Inclusive jet production

The jet fragmentation function and transverse profile for jets with 25 GeV $< p_\text{T jet} < 500$ GeV and $|\eta_\text{jet}| < 1.2$ produced in proton-proton collisions with a center-of-mass energy of 7 TeV are presented. The measurement is performed using data with an integrated luminosity of 36 pb${}^{-1}$. Jets are reconstructed and their momentum measured using calorimetric information. The momenta of the charged particle constituents are measured using the tracking system. The distributions corrected for detector effects are compared with various Monte Carlo event generators and generator tunes. Several of these choices show good agreement with the measured fragmentation function. None of these choices reproduce both the transverse profile and fragmentation function over the full kinematic range of the measurement.

ATLAS_2011_I930220

Inclusive and dijet cross-sections of $b$-jets in $pp$ collisions at $\sqrt{s} = 7$ TeV with ATLAS
Experiment: ATLAS (LHC)
Inspire ID: 930220
Status: VALIDATED
Authors:
  • Stephen Paul Bieniek
References:
  • Eur.Phys.J. C71 (2011) 1846
  • arXiv: 1109.6833
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • QCD events at 7 TeV

The inclusive and dijet production cross-sections have been measured for jets containing $b$-hadrons ($b$-jets) in proton--proton collisions at a centre-of-mass energy of $\sqrt{s} = 7$ TeV, using the ATLAS detector at the LHC. The measurements use data corresponding to an integrated luminosity of 34 pb$^-1$. The $b$-jets are identified using either a lifetime-based method, where secondary decay vertices of $b$-hadrons in jets are reconstructed using information from the tracking detectors, or a muon-based method where the presence of a muon is used to identify semileptonic decays of $b$-hadrons inside jets. The inclusive $b$-jet cross-section is measured as a function of transverse momentum in the range $20 < pT < 400$ GeV and rapidity in the range $|y| < 2.1$. The $b\bar{b}$-dijet cross-section is measured as a function of the dijet invariant mass in the range $110 < $m_{jj}$ < 760$\;GeV, the azimuthal angle difference between the two jets and the angular variable $\chi$ in two dijet mass regions. The results are compared with next-to-leading-order QCD predictions. Good agreement is observed between the measured cross-sections and the predictions obtained using POWHEG+Pythia6. MC@NLO+Herwig shows good agreement with the measured $b\bar{b}$-dijet cross-section. However, it does not reproduce the measured inclusive cross-section well, particularly for central $b$-jets with large transverse momenta.

ATLAS_2011_I944826

$K_S^0$ and $\Lambda$ production at 0.9 and 7 TeV with ATLAS
Experiment: ATLAS (LHC)
Inspire ID: 944826
Status: VALIDATED
Authors:
  • Holger Schulz
References: Beams: p+ p+
Beam energies: (450.0, 450.0); (3500.0, 3500.0) GeV
Run details:
  • QCD events, 900\;GeV and 7\;TeV. $\Lambda$ and $K_S$ must be able to decay. Allow only charged decay modes to improve efficiency.

The production of $K_S$ and $\Lambda$ hadrons is studied in inelastic $pp$ collisions at $\sqrt{s} = 0.9$ and 7 TeV collected with the ATLAS detector at the LHC using a minimum-bias trigger. The observed distributions of transverse momentum, rapidity, and multiplicity are corrected to hadron level in a model-independent way within well defined phase-space regions. The distribution of the production ratio of $\bar{\Lambda}$ to $\Lambda$ baryons is also measured. The results are compared with various Monte Carlo simulation models. Although most of these models agree with data to within 15 percent in the $K_S$ distributions, substantial disagreements with data are found in the $\Lambda$ distributions of transverse momentum.

ATLAS_2011_I945498

$Z$+jets in $pp$ at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 945498
Status: VALIDATED
Authors:
  • Evelin Meoni
  • Holger Schulz
  • Roman Lysak
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Z+jets, electronic and/or muonic Z-decays. Jets with transverse momentum $p_T > 30$ GeV and jet rapidity $|y| < 4.4$.

Production of jets in association with a $Z/\gamma^*$ boson in proton--proton collisions at $\sqrt{s} = 7$ TeV with the ATLAS detector. The analysis includes the full 2010 data set, collected with a low rate of multiple proton--proton collisions in the accelerator, corresponding to an integrated luminosity of 36 pb$^{-1}$. Inclusive jet cross sections in $Z/\gamma^*$ events, with $Z/\gamma^*$ decaying into electron or muon pairs, are measured for jets with transverse momentum $p_T > 30$ GeV and jet rapidity $|y| < 4.4$.

ATLAS_2011_I954993

$WZ$ fiducial cross-section at 7 TeV in ATLAS
Experiment: ATLAS (LHC 7TeV)
Inspire ID: 954993
Status: VALIDATED
Authors:
  • Lynn Marx
  • Roman Lysak
References:
  • Phys.Lett. B709 (2012) 341-357
  • arXiv: 1111.5570
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • pp WZ events at 7 TeV with direct e, mu W/Z boson decays (no taus from W/Z)

This is a measurement of $WZ$ production in 1.02 fb$^{-1}$ of $pp$ collision data at $\sqrt{s} = $7 TeV collected by the ATLAS experiment in 2011. Doubly leptonic decay events are selected with electrons, muons and missing transverse momentum in the final state. The measurement of the combined fiducial cross section for the $WZ$ bosons decaying directly into electrons and muons is performed.

ATLAS_2011_S8924791

Jet shapes at 7 TeV in ATLAS
Experiment: ATLAS (LHC)
Inspire ID: 882984
Status: VALIDATED
Authors:
  • Andy Buckley
  • Francesc Vives
  • Judith Katzy
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • $pp$ QCD interactions at 7 TeV GeV, corresponding to JX samples. Matching plots to kinematic $p_\perp$ cut samples, or merging from slices or $p_\perp$-enhanced sampling is advised.

Measurement of jet shapes in inclusive jet production in $pp$ collisions at 7 TeV based on 3 pb$^{-1}$ of data. Jets are reconstructed in $|\eta| < 5$ using the anti-$k_\perp$ algorithm with $30 < p_\perp < 600$ GeV and $|y| < 2.8$.

ATLAS_2011_S8971293

Dijet azimuthal decorrelations
Experiment: ATLAS (LHC)
Inspire ID: 889546
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • pp QCD interactions at 7000 GeV. The distributions are binned in leading pT starting at 110 GeV with the last bin starting at 800 GeV.

Dijet azimuthal decorrelation measured by ATLAS at 7 TeV. Jets are anti-$k_t$ with $R = 0.6$, $p_\perp > 100$\;GeV, $|\eta| < 0.8$. The analysis is binned in leading jet $p_\perp$ bins. All data is fully corrected for detector effects.

ATLAS_2011_S8983313

0-lepton squark and gluino search
Experiment: ATLAS (LHC)
Inspire ID: 890749
Status: VALIDATED
Authors:
  • David Grellscheid
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • BSM signal events at 7000 GeV.

0-lepton search for squarks and gluinos by ATLAS at 7 TeV with an integrated luminosity of $35\,\mathrm{pb}^{-1}$. Event counts in four signal regions A-D are implemented as one-bin histograms.

ATLAS_2011_S8994773

Calo-based underlying event at 900 GeV and 7 TeV in ATLAS
Experiment: ATLAS (LHC)
Inspire ID: 891834
Status: VALIDATED
Authors:
  • Jinlong Zhang
  • Andy Buckley
References: Beams: p+ p+
Beam energies: (450.0, 450.0); (3500.0, 3500.0) GeV
Run details:
  • pp QCD interactions at 900 GeV and 7 TeV. Diffractive events should be included, but only influence the lowest bins. Multiple kinematic cuts should not be required.

Underlying event measurements with the ATLAS detector at the LHC at center-of-mass energies of 900 GeV and 7 TeV, using calorimeter clusters rather than charged tracks.

ATLAS_2011_S9002537

Muon charge asymmetry in W events at 7 TeV in ATLAS
Experiment: ATLAS (LHC)
Inspire ID: 892704
Status: VALIDATED
Authors:
  • Frank Krauss
  • Hendrik Hoeth
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • $W \to \mu\nu$ events at 7 TeV

Measurement of the muon charge asymmetry from W bosons produced in proton-proton collisions at a centre-of-mass energy of 7 TeV with ATLAS. The asymmetry is measured in the $W \to \mu$ decay mode as a function of the muon pseudorapidity using a data sample corresponding to a total integrated luminosity of 31 pb$^{-1}$.

ATLAS_2011_S9019561

Two lepton supersymmetry search
Experiment: ATLAS (LHC)
Inspire ID: 894578
Status: VALIDATED
Authors:
  • Angela Chen
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • BSM signal events at 7000 GeV.

2-lepton search for supersymmetric particles by ATLAS at 7 TeV. Event counts in signal regions (3 same sign and 3 opposite sign) are implemented as one bin histograms. Histograms for missing transverse energy are implemented.

ATLAS_2011_S9035664

Measurement of J/Psi production
Experiment: ATLAS (LHC)
Inspire ID: 896268
Status: VALIDATED
Authors:
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • pp to hadrons including both prompt J/Psi production and the production in B decays

The inclusive $J/\psi$ production cross-section and fraction of $J/\psi$ mesons produced in B-hadron decays are measured in proton-proton collisions at $\sqrt{s} = 7$ TeV with the ATLAS detector at the LHC, as a function of the transverse momentum and rapidity of the J/psi, using 2.3$\textrm{pb}^{-1}$ of integrated luminosity. The cross section is measured from a minimum $p_T$ of 1 GeV to a maximum of 70 GeV and for rapidities within $|y| < 2.4$ giving the widest reach of any measurement of $J/\psi$ production to date.

ATLAS_2011_S9041966

1-lepton and 2-lepton search for first or second generation leptoquarks
Experiment: ATLAS (LHC)
Inspire ID: 897002
Status: OBSOLETE
Authors:
  • Angela Chen
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • BSM signal events at 7000 GeV.

Single and dilepton search for first and second generation scalar leptoquarks by ATLAS at 7 TeV. Event counts in four signal regions (single lepton and dilepton for first and second generation) are implemented as one-bin histograms. Histograms for event transverse energy are implemented for dilepton signal regions and histograms for leptoquark mass are implemented for single lepton signal regions. Histograms for observables in six control regions are implemented.

ATLAS_2011_S9108483

Long-lived heavy charged particle search
Experiment: ATLAS (LHC)
Inspire ID: 914491
Status: UNVALIDATED
Authors:
  • Peter Richardson
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • BSM signal events at 7000 GeV.

ATLAS search for long-lived heavy charged particles for four different mass cuts. Currently only the slepton search is implemented.

ATLAS_2011_S9120807

Inclusive isolated diphoton analysis
Experiment: ATLAS (LHC 7TeV)
Inspire ID: 916832
Status: VALIDATED
Authors:
  • Giovanni Marchiori
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Inclusive diphoton + $X$ events at $\sqrt{s} = 7$ TeV.

A measurement of the cross section for inclusive isolated photon production at $\sqrt{s} = 7$ TeV. The measurement is done in bins of $M_{\gamma\gamma}$, $p_{T\gamma\gamma}$, and $\Delta\phi_{\gamma\gamma}$, for isolated photons with $|\eta|<2.37$ and $E_T^\gamma>16$ GeV. The measurement uses 37 pb$^{-1}$ of integrated luminosity collected with the ATLAS detector.

ATLAS_2011_S9126244

Measurement of dijet production with a veto on additional central jet activity
Experiment: ATLAS (LHC)
Inspire ID: 917526
Status: VALIDATED
Authors:
  • Graham Jones
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Require QCD interactions at 7TeV. A substantial number of events are required to populate the large rapidity seperation region.

A measurement of the jet activity in rapidity intervals bounded by a dijet system. The fraction of events passing a veto requirement are shown as a function of both the rapidity interval size and the average transverse momentum of the dijet system. The average number of jets above the veto threshold are also shown as a function of the same variables. There are two possible selection criteria applied to data. Either the two highest transverse momentum jets or the jets most forward and backward in rapidity are taken to define the dijet system, where the veto threhsold is 20\;GeV. Additionally for the latter selection an alternative veto transverse momentum threshold which is equal to the average transverse momentum is applied. Jet selections are based on the anti-$k_t$ algorithm with $R=0.6$, $p_\perp > 20$\;GeV and $|y_\text{jet}| < 4.4$.

ATLAS_2011_S9128077

Measurement of multi-jet cross sections
Experiment: ATLAS (LHC)
Inspire ID: 917599
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Pure QCD, inclusive enough for jet pT down to 60 GeV.

Inclusive multi-jet production is studied using an integrated luminosity of 2.4 pb-1. Results on multi-jet cross sections are presented differential in pT of the four leading jets, HT. Additionally three-to-two jet fractions are presented differential in different observables. Jets are anti-$k_t$ with $R=0.4$ and $R=0.6$, $p_\perp>80(60)$ GeV and $|\eta|<2.8$.

ATLAS_2011_S9131140

Measurement of the Z pT with electrons and muons at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 917931
Status: VALIDATED
Authors:
  • Elena Yatsenko
  • Judith Katzy
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Run with inclusive $Z$ events, with $Z/\gamma^*$ decays to electrons and/or muons.

The Z pT at $\sqrt{s} = 7$\;TeV is measured using electron and muon $Z$ decay channels. The dressed leptons definition uses photons clustered in a cone around the charged leptons, while the bare lepton definition uses the post-FSR charged leptons only in the $Z$ reconstruction. The data used in the bare leptons calculation are based on a forward application of a PHOTOS-based energy loss correction and are hence not quite model-independent.

ATLAS_2011_S9212183

0-lepton squark and gluino search
Experiment: ATLAS (LHC)
Inspire ID: 930002
Status: VALIDATED
Authors:
  • Chris Wymant
  • David Grellscheid
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • BSM signal events at 7000 GeV.

0-lepton search for squarks and gluinos by ATLAS at 7 TeV with an integrated luminosity of $1.04\,\mathrm{fb}^{-1}$. Event counts in five signal regions are implemented as one-bin histograms.

ATLAS_2011_S9212353

Single lepton search for supersymmetry
Experiment: ATLAS (LHC)
Inspire ID: 930005
Status: OBSOLETE
No authors listed References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • BSM signal events at 7000 GeV.

Single lepton search for supersymmmetric particles by ATLAS at 7 TeV. Event counts in electron and muon signal regions are implemented as one-bin histograms. Histograms for missing transverse energy and effective mass are implemented for the two signal regions.

ATLAS_2011_S9225137

High jet multiplicity squark and gluino search
Experiment: ATLAS (LHC)
Inspire ID: 939504
Status: VALIDATED
Authors:
  • Peter Richardson
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • BSM signal events at 7000 GeV.

Search for SUSY using events with 6 or more jets in association with missing transverse momentum produced in proton-proton collisions at a centre-of-mass energy of 7 TeV. The data sample has a total integrated luminosity of 1.34 fb$^{-1}$. Distributions in the $W$ and top control regions are not produced, while in addition to the plots from the paper the count of events in the different signal regions is included.

ATLAS_2012_CONF_2012_001

4 or more lepton plus missing transverse energy SUSY search
Experiment: ATLAS (LHC)
Status: PRELIMINARY
Authors:
  • Peter Richardson
References:
  • ATLAS-CONF-2012-001
  • ATLAS-CONF-2012-035
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • BSM signal events at 7000 GeV.

Search for SUSY using events with 4 or more leptons in association with missing transverse energy in proton-proton collisions at a centre-of-mass energy of 7 TeV. The data sample has a total integrated luminosity of 2.06 fb$^{-1}$. There is no reference data and in addition to the control plots from the paper the number of events in the two signal regions, correctly normalized to an integrated luminosity 2.06 fb$^{-1}$, are calculated.

ATLAS_2012_CONF_2012_103

High jet multiplicity squark and gluino search
Experiment: ATLAS (LHC)
Status: OBSOLETE
Authors:
  • Peter Richardson
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • BSM signal events at 8000 GeV.

Search for SUSY using events with 6 or more jets in association with missing transverse momentum produced in proton-proton collisions at a centre-of-mass energy of 8 TeV. The data sample has a total integrated luminosity of 5.8 fb$^{-1}$. Distributions in the W and top control regions are not produced, while in addition to the plots from the paper the count of events in the different signal regions is included. The analysis is identical to the previous 7 TeV paper.

ATLAS_2012_CONF_2012_104

Search for supersymmetry at 8 TeV in final states with jets, missing transverse momentum and one lepton with the ATLAS detector.
Experiment: ATLAS (LHC)
Status: OBSOLETE
Authors:
  • Peter Richardson
References:
  • ATLAS-CONF-2012-104
Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • BSM signal events at 8000 GeV.

One lepton search for supersymmmetric particles by ATLAS at 8 TeV with $5.8\,\text{fb}^{-1}$ integrated luminosity. Event counts in the signal regions are implemented as one-bin histograms. Histograms for effective mass are implemented for the two signal hard lepton signal regions and the ratio of missing transverse energy to effective mass for the soft lepton region.

ATLAS_2012_CONF_2012_105

Search for supersymmetry with 2 same-sign leptons, jets and missing transverse energy
Experiment: ATLAS (LHC)
Status: OBSOLETE
Authors:
  • Peter Richardson
References:
  • ATLAS-CONF-2012-105
Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • BSM signal events at 8000 GeV.

Results of the search for the production of supersymmetric particles decaying into final states with missing transverse momentum and two isolated same-sign leptons, electrons or muons. The analysis uses a data sample collected during the first half of 2012 that corresponds to a total integrated luminosity o1 $5.8\,\text{fb}^{-1}$ of $\sqrt{s} = 8$\,TeV proton-proton collisions recorded with the ATLAS detector at the Large Hadron Collider. Opposite-sign and same-sign dilepton events are studied separately.

ATLAS_2012_CONF_2012_109

0-lepton squark and gluino search
Experiment: ATLAS (LHC)
Inspire ID: 1125961
Status: OBSOLETE
Authors:
  • Peter Richardson
  • David Grellscheid
  • Chris Wymant
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • BSM signal events at 8000 GeV.

0-lepton search for squarks and gluinos by ATLAS at 8 TeV. Event counts in five signal regions are implemented as one-bin histograms.

ATLAS_2012_CONF_2012_153

4 or more lepton plus missing transverse energy SUSY search
Experiment: ATLAS (LHC)
Status: PRELIMINARY
Authors:
  • Peter Richardson
References:
  • ATLAS-CONF-2012-153
Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • BSM signal events at 8000 GeV.

Search for SUSY using events with 4 or more leptons in association with missing transverse energy in proton-proton collisions at a centre-of-mass energy of 8 TeV. The data sample has a total integrated luminosity of 13.0 fb$^{-1}$. There is no reference data and in addition to the control plots from the paper the number of events in the two signal regions, correctly normalized to an integrated luminosity 13.0 fb$^{-1}$, are calculated.

ATLAS_2012_I1082009

$D^{*\pm}$ production in jets
Experiment: ATLAS (LHC)
Inspire ID: 1082009
Status: VALIDATED
Authors:
  • Peter Richardson
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • All flavours of quark and gluon jet production at 7 TeV

Measurement of $D^{*\pm}$ meson production in jets from proton-proton collisions at a centre-of-mass energy of $\sqrt{s}=7$ TeV at the LHC. The measurement is based on a data sample recorded with the ATLAS detector with an integrated luminosity of $0.30\,\text{pb}^{-1}$ for jets with transverse momentum between 25 and 70 GeV in the pseudorapidity range $|eta| < 2.5$.

ATLAS_2012_I1082936

Inclusive jet and dijet cross sections at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1082936
Status: VALIDATED
Authors:
  • Holger Schulz hschulz@physik.hu-berlin.de
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • QCD jet production with a minimum leading jet pT of 30 GeV and minimum second jet pT of 20 GeV at 7 TeV.

Inclusive jet and dijet cross sections have been measured in proton-proton collisions at a centre-of-mass energy of 7 TeV using the ATLAS detector at the Large Hadron Collider. The cross sections were measured using jets clustered with the anti-kT algorithm with parameters R=0.4 and R=0.6. These measurements are based on the 2010 data sample, consisting of a total integrated luminosity of 37 inverse picobarns. Inclusive jet double-differential cross sections are presented as a function of jet transverse momentum, in bins of jet rapidity. Dijet double-differential cross sections are studied as a function of the dijet invariant mass, in bins of half the rapidity separation of the two leading jets. The measurements are performed in the jet rapidity range $|y|<4.4$, covering jet transverse momenta from 20 GeV to 1.5 TeV and dijet invariant masses from 70 GeV to 5 TeV. This is the successor analysis of ATLAS_2010_S8817804

ATLAS_2012_I1083318

$W$+jets production at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1083318
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • W+jet events in either the electron or the muon decay channel (but not both).

Differential cross-sections of properties of the four leading jets in $W$+jets production, using the full 2010 dataset of 36 pb$^-1$. Observables include jet multiplicities, $pT$, $H_T$, angular distances, and others. All observables are available using jets with $pT>30$ and $pT>20$ GeV.

ATLAS_2012_I1084540

Rapidity gap cross sections measured with the ATLAS detector in $pp$ collisions at $\sqrt{s} = 7$ TeV.
Experiment: ATLAS (LHC 7TeV)
Inspire ID: 1084540
Status: VALIDATED
Authors:
  • Oldrich Kepka
  • Tim Martin
  • Paul Newman
  • Pavel Ruzicka
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Minimum bias inelastic pp collision at 7 TeV including diffractive component and overall cross section.

Pseudorapidity gap distributions in proton-proton collisions at $\sqrt{s} = 7$ TeV are studied using a minimum bias data sample with an integrated luminosity of 7.1 inverse microbarns. Cross sections are measured differentially in terms of $\Delta \eta_F$, the larger of the pseudorapidity regions extending to the limits of the ATLAS sensitivity, at $\eta = \pm 4.9$, in which no final state particles are produced above a transverse momentum threshold $p_\perp$ cut. The measurements span the region $0 < \Delta \eta_F < 8$ for $200 < p_T\text{ cut} < 800\;\text{MeV}$. At small $\Delta \eta_F$, the data test the reliability of hadronisation models in describing rapidity and transverse momentum fluctuations in final state particle production. The measurements at larger gap sizes are dominated by contributions from the single diffractive dissociation process ($pp \to Xp$), enhanced by double dissociation ($pp \to XY$) where the invariant mass of the lighter of the two dissociation systems satisfies $M_Y \lesssim 7\;\text{GeV}$. The resulting cross section is $\mathrm{d} \sigma / \mathrm{d} \Delta \eta_F \sim 1$ mb for $\Delta \eta_F \gtrsim 3$. The large rapidity gap data are used to constrain the value of the pomeron intercept appropriate to triple Regge models of soft diffraction. The cross section integrated over all gap sizes is compared with other LHC inelastic cross section measurements.

ATLAS_2012_I1091481

Azimuthal ordering of charged hadrons
Experiment: ATLAS (LHC)
Inspire ID: 1091481
Status: VALIDATED
Authors:
  • Sharka Todorova
  • Holger Schulz
  • Christian Guetschow
References: Beams: p+ p+
Beam energies: (450.0, 450.0); (3500.0, 3500.0) GeV
Run details:
  • QCD events with diffractives switched on.

Measurement of the ordering of charged hadrons in the azimuthal angle relative to the beam axis at the Large Hadron Collider (LHC). A spectral analysis of correlations between longitudinal and transverse components of the momentum of the charged hadrons is performed. Data were recorded with the ATLAS detector at centre-of-mass energies of $\sqrt{s} = 900\;\text{GeV}$ and $\sqrt{s} = 7\;\text{TeV}$. The correlations measured in a phase space region dominated by low-$p_\perp$ particles are not well described by conventional models of hadron production. The measured spectra show features consistent with the fragmentation of a QCD string represented by a helix-like ordered gluon chain.

ATLAS_2012_I1093734

Forward-backward and $\phi$ correlations at 900 GeV and 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1093734
Status: VALIDATED
Authors:
  • Camille Belanger-Champagne
  • Andy Buckley
  • Craig Buttar
  • Roman Lysak
References: Beams: p+ p+
Beam energies: (450.0, 450.0); (3500.0, 3500.0) GeV
Run details:
  • QCD events at 7 TeV and 900 GeV. Diffractive events should be included.

Using inelastic proton-proton interactions at $\sqrt{s}$ = 900 GeV and 7 TeV, recorded by the ATLAS detector at the LHC, measurements have been made of the correlations between forward and backward charged-particle multiplicities and, for the first time, between forward and backward charged-particle summed transverse momentum. In addition, jet-like structure in the events is studied by means of azimuthal distributions of charged particles relative to the charged particle with highest transverse momentum in a selected kinematic region of the event.

ATLAS_2012_I1093738

Isolated prompt photon + jet cross-section
Experiment: ATLAS (LHC)
Inspire ID: 1093738
Status: VALIDATED
Authors:
  • Giovanni Marchiori
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Inclusive photon+jet+X events at $\sqrt{s} = 7$ TeV.

A measurement of the production cross section for isolated photons in association with jets in $pp$ collisions at $\sqrt{s} = 7$ TeV. Photons with $|\eta|<1.37$ and $E_T>25$ GeV and jets with $|y|<4.4$ and $p_T>20$ GeV are selected. The differential cross section as a function of the photon transverse energy is measured, for three leading jet rapidity configurations, separately for the cases where the photon and jet rapidities have the same or the opposite sign. The measurement uses 37 pb$^{-1}$ of integrated luminosity collected with the ATLAS detector.

ATLAS_2012_I1094564

Jet mass and substructure of inclusive jets at 7 TeV
Experiment: ATLAS (LHC 7TeV)
Inspire ID: 1094564
Status: VALIDATED
Authors:
  • Karl Nordstrom
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • pp QCD events at 7 TeV

In this analysis, the assumption that the internal substructure of jets generated by QCD radiation is well understood is tested on an inclusive sample of jets recorded with the ATLAS detector in 2010, which corresponds to 35 $pb^{-1}$ of $pp$ collisions delivered by the LHC at $\sqrt{s} = 7$ TeV. Jet invariant mass, $k_{t}$ splitting scales and $N$-subjettiness variables are presented for anti-$k_{t}$ $R = 1.0$ jets and Cambridge-Aachen $R = 1.2$ jets. Jet invariant-mass spectra for Cambridge-Aachen $R = 1.2$ jets after a splitting and filtering procedure are also presented.

ATLAS_2012_I1094568

Measurement of ttbar production with a veto on additional central jet activity
Experiment: ATLAS (LHC)
Inspire ID: 1094568
Status: VALIDATED
Authors:
  • Kiran Joshi
References:
  • arXiv: 1203.5015
  • Eur.Phys.J. C72 (2012) 2043
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Require dileptonic ttbar events at 7TeV. It is important to not include semileptonic decay channels in the runs, as they can not be vetoed in the analysis in a generator-independent fashion but have been subtracted from the particle level measurement. The tau decay channels also count as leptonic.

A measurement of the additional jet activity in dileptonic ttbar events. The fraction of events passing a veto requirement are shown as a function the veto scale for four central rapidity intervals. Two veto definitions are used: events are vetoed if they contain an additional jet in the rapidity interval with transverse momentum above a threshold, or alternatively, if the scalar transverse momentum sum of all additional jets in the rapidity interval is above a threshold.

ATLAS_2012_I1095236

$b$-jets search for supersymmetry with 0- and 1-leptons
Experiment: ATLAS (LHC)
Inspire ID: 1095236
Status: UNVALIDATED
Authors:
  • Peter Richardson
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • BSM signal events at 7000 GeV.

Search for supersymmmetric particles by ATLAS at 7 TeV in events with b-jets, large missing energy, and zero or one leptons. Event counts in six zero lepton and two one lepton signal regions are implemented as one-bin histograms. Histograms for missing transverse energy, and effective mass are also implemented for some signal regions.

ATLAS_2012_I1112263

3 lepton plus missing transverse energy SUSY search
Experiment: ATLAS (LHC)
Inspire ID: 1112263
Status: VALIDATED
Authors:
  • Peter Richardson
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • BSM signal events at 7000 GeV.

Search for SUSY using events with 3 leptons in association with missing transverse energy in proton-proton collisions at a centre-of-mass energy of 7 TeV. The data sample has a total integrated luminosity of 2.06 fb$^{-1}$. There is no reference data and in addition to the control plots from the paper the number of events in the two signal regions, correctly normalized to an integrated luminosity 2.06 fb$^{-1}$, are calculated.

ATLAS_2012_I1117704

High jet multiplicity squark and gluino search
Experiment: ATLAS (LHC)
Inspire ID: 1117704
Status: VALIDATED
Authors:
  • Peter Richardson
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • BSM signal events at 7000 GeV.

Search for SUSY using events with 6 or more jets in association with missing transverse momentum produced in proton-proton collisions at a centre-of-mass energy of 7 TeV. The data sample has a total integrated luminosity of 4.7 fb$^{-1}$. Distributions in the W and top control regions are not produced, while in addition to the plots from the paper the count of events in the different signal regions is included.

ATLAS_2012_I1118269

$b$-hadron production cross-section using decays to $D^*\mu^-X$ at $\sqrt{s} = 7$\;TeV
Experiment: ATLAS (LHC)
Inspire ID: 1118269
Status: VALIDATED
Authors:
  • Andy Buckley
  • Sercan Sen
  • Peter Skands
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • pp to b-hadron + X at 7 TeV, i.e. switch on "HardQCD:gg2bbbar" and "HardQCD:qqbar2bbbar" flags in Pythia8.

Measurement of $b$-hadron production cross section using 3.3\;pb$^{-1}$ of integrated luminosity, collected during the 2010 LHC run. The $b$-hadrons are selected by partially reconstructing $D^{*}\mu^-X$ final states using only direct semileptonic decays of $b$ to $D^*\mu^-X$. Differential cross sections as functions of $p_\perp$ and $|\eta|$.

ATLAS_2012_I1119557

Jet shapes and jet masses
Experiment: ATLAS (LHC 7TeV)
Inspire ID: 1119557
Status: VALIDATED
Authors:
  • Lily Asquith
  • Roman Lysak
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • QCD events at 7 TeV, leading-pT jets with $p_\perp > 300\;GeV$.

Measurements are presented of the properties of high transverse momentum jets, produced in proton-proton collisions at a center-of-mass energy of $\sqrt{s} = 7$\;TeV. Jet mass, width, eccentricity, planar flow and angularity are measured for jets reconstructed using the anti-$k_t$ algorithm with distance parameters $R = 0.6$ and 1.0, with transverse momentum $pT > 300$\;GeV and pseudorapidity $|\eta| < 2$.

ATLAS_2012_I1124167

Measurement of charged-particle event shape variables
Experiment: ATLAS (LHC)
Inspire ID: 1124167
Status: VALIDATED
Authors:
  • Deepak Kar
References:
  • arXiv: 1207.6915
  • Phys.Rev. D88 (2013) 032004
  • 10.1103/PhysRevD.88.032004
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Minimum bias events with at least 6 charged particles at 7 TeV

The measurement of charged-particle event shape variables is presented in inclusive inelastic $pp$ collisions at a center-of-mass energy of 7 TeV using the ATLAS detector at the LHC. The observables studied are the transverse thrust, thrust minor, and transverse sphericity, each defined using the final-state charged particles momentum components perpendicular to the beam direction. Events with at least six charged particles are selected by a minimum-bias trigger. In addition to the differential distributions, the evolution of each event shape variable as a function of the leading charged-particle transverse momentum, charged-particle multiplicity, and summed transverse momentum is presented.

ATLAS_2012_I1125575

Studies of the underlying event at 7 TeV with track-jets
Experiment: ATLAS (LHC)
Inspire ID: 1125575
Status: VALIDATED
Authors:
  • Kiran Joshi
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Minimum bias events at 7 TeV.

Distributions sensitive to the underlying event are studied in events containing one or more charged particles. Jets are reconstructed using the anti-$k_t$ algorithm with radius parameter $R$ varying between 0.2 and 1.0. Distributions of the charged-particle multiplicity, the scalar sum of the transverse momentum of charged particles, and the average charged-particle pT are measured as functions of $p_\perp^\text{jet}$ in regions transverse to and opposite the leading jet for $4 \text{GeV} < p_\perp^\text{jet} < 100 \text{GeV}$. In addition, the $R$-dependence of the mean values of these observables is studied.

ATLAS_2012_I1125961

0-lepton squark and gluino search
Experiment: ATLAS (LHC)
Inspire ID: 1125961
Status: VALIDATED
Authors:
  • Peter Richardson
  • David Grellscheid
  • Chris Wymant
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • BSM signal events at 7000 GeV.

0-lepton search for squarks and gluinos by ATLAS at 7 TeV. Event counts in five signal regions are implemented as one-bin histograms.

ATLAS_2012_I1126136

SUSY top partner search in jets with missing transverse momentum
Experiment: ATLAS (LHC)
Inspire ID: 1126136
Status: UNVALIDATED
Authors:
  • Peter Richardson
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • BSM signal events at 7000 GeV.

Search for direct pair production of supersymmetric top squarks, assuming the stop_1 decays into a top quark and the lightest supersymmetric particle, and that both top quarks decay to purely hadronic final states. This search has an integrated luminosity of 4.7 fb$^{-1}$ at $\sqrt{s} = 8$\,TeV.

ATLAS_2012_I1180197

Search for supersymmetry at 7 TeV in final states with jets, missing transverse momentum and isolated leptons with the ATLAS detector.
Experiment: ATLAS (LHC)
Inspire ID: 1180197
Status: UNVALIDATED
Authors:
  • Peter Richardson
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • BSM signal events at 7000 GeV.

One and two lepton search for supersymmmetric particles by ATLAS at 7 TeV. Event counts in the signal regions are implemented as one-bin histograms. Histograms for effective mass are implemented for the two signal hard lepton signal regions and the ratio of missing transverse energy to effective mass for the soft lepton region. Only the one lepton plots are currently implemented as taken from a conf note originally.

ATLAS_2012_I1183818

Pseudorapidity dependence of the total transverse energy at 7 TeV
Experiment: ATLAS (LHC 7TeV)
Inspire ID: 1183818
Status: VALIDATED
Authors:
  • Robindra Prabhu
  • Peter Wijeratne
  • Roman Lysak
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • pp QCD interactions at 7 TeV, min bias and di-jet events

The measurement of the sum of the transverse energy of particles as a function of particle pseudorapidity, eta, in proton-proton collisions at a centre-of-mass energy, $\sqrt{s} = 7\;\text{TeV}$ using the ATLAS detector at the Large Hadron Collider. The measurements are performed in the region $|\eta| < 4.8$ for two event classes: those requiring the presence of particles with a low transverse momentum and those requiring particles with a significant transverse momentum (dijet events where both jets have $E_T > 20$ GeV). In the second dataset measurements are made in the region transverse to the hard scatter.

ATLAS_2012_I1186556

Search for a heavy top-quark partner in final states with two leptons.
Experiment: ATLAS (LHC)
Inspire ID: 1186556
Status: UNVALIDATED
Authors:
  • Peter Richardson
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • BSM signal events at 7000 GeV.

Search for direct pair production of heavy top-quark partners with 4.7 fb$^{-1}$ integrated luminosity at $\sqrt{s} = 7 TeV$ by the ATLAS experiment. Heavy top-quark partners decaying into a top quark and a neutral non-interacting particle are searched for in events with two leptons in the final state.

ATLAS_2012_I1188891

Flavour composition of dijet events at 7 TeV
Experiment: ATLAS (LHC 7TeV)
Inspire ID: 1188891
Status: VALIDATED
Authors:
  • Cecile Lapoire
  • Roman Lysak
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • pp di-jet events at 7 TeV

The measurement of the flavour composition of dijet events produced in pp collisions at $\sqrt{s}=7\;\text{TeV}$ using the ATLAS detector. Six possible combinations of light, charm and bottom jets are identified in the dijet events, where the jet flavour is defined by the presence of bottom, charm or solely light flavour hadrons in the jet. The fractions of these dijet flavour states as functions of the leading jet transverse momentum in the range 40 GeV to 500 GeV and jet rapidity $|y| < 2.1$ are measured.

ATLAS_2012_I1190891

4 or more lepton plus missing transverse energy SUSY search
Experiment: ATLAS (LHC)
Inspire ID: 1190891
Status: UNVALIDATED
Authors:
  • Peter Richardson
References:
  • ATLAS-CONF-2012-001
  • ATLAS-CONF-2012-035
  • arXiv: 1210.4457
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • BSM signal events at 7000 GeV.

Search for R-parity violating SUSY using events with 4 or more leptons in association with missing transverse energy in proton-proton collisions at a centre-of-mass energy of 7 TeV. The data sample has a total integrated luminosity of 4.7 fb$^{-1}$.

ATLAS_2012_I1199269

Inclusive diphoton $+ X$ events at $\sqrt{s} = 7$ TeV
Experiment: ATLAS (LHC)
Inspire ID: 1199269
Status: VALIDATED
Authors:
  • Giovanni Marchiori
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Inclusive diphoton $+ X$ events at $\sqrt{s} = 7$ TeV.

The ATLAS experiment at the LHC has measured the production cross section of events with two isolated photons in the final state, in proton-proton collisions at $\sqrt{s} = 7$ TeV. The full data set collected in 2011, corresponding to an integrated luminosity of 4.9 fb$^{-1}$, is used. The amount of background, from hadronic jets and isolated electrons, is estimated with data-driven techniques and subtracted. The total cross section, for two isolated photons with transverse energies above 25 GeV and 22 GeV respectively, in the acceptance of the electromagnetic calorimeter ($|\eta|<1.37$ and $1.52<|\eta|<2.37$) and with an angular separation $\Delta R>0.4$, is $44.0^{+3.2}_{-4.2}$ pb. The differential cross sections as a function of the di-photon invariant mass, transverse momentum, azimuthal separation, and cosine of the polar angle of the largest transverse energy photon in the Collins--Soper di-photon rest frame are also measured. The results are compared to the prediction of leading-order parton-shower and next-to-leading-order and next-to-next-to-leading-order parton-level generators.

ATLAS_2012_I1203852

Measurement of the $ZZ(*)$ production cross-section in $pp$ collisions at 7 TeV with ATLAS
Experiment: ATLAS (LHC)
Inspire ID: 1203852
Status: VALIDATED
Authors:
  • Oldrich Kepka
  • Katerina Moudra
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Run with inclusive $Z$ events, with $Z$ decays to 4 leptons or 2 leptons + MET.

Measurement of the fiducial cross section for $ZZ(*)$ production in proton proton collisions at a centre-of mass energy of 7 TeV, is presented, using data corresponding to an integrated luminosity of 4.6/fb collected by the ATLAS experiment at the Large Hadron Collider. The cross-section is measured using processes with two $Z$ bosons decaying to electrons or muons or with one $Z$ boson decaying to electrons or muons and a second $Z$ boson decaying to neutrinos. The fiducial region contains dressed leptons in restricted $p_T$ and $\eta$ ranges. The selection has specific requirements for both production processes. A measurement of the normalized fiducial cross-section as a function of $ZZ$ invariant mass, leading $Z$ $p_T$ and angle of two leptons coming from the leading $Z$ is also presented for both signal processes.

ATLAS_2012_I1204447

Inclusive multi-lepton search
Experiment: ATLAS (LHC)
Inspire ID: 1204447
Status: VALIDATED
Authors:
  • Joern Mahlstedt
References:
  • arXiv: 1211.6312
  • Phys. Rev. D 87, 052002 (2013)
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Any process producing at least 3 leptons (e.g. pair production of doubly-charged Higgs)

A generic search for anomalous production of events with at least three charged leptons is presented. The search uses a pp-collision data sample at a center-of-mass energy of $\sqrt{s}$ = 7 TeV corresponding to 4.6/fb of integrated luminosity collected in 2011 by the ATLAS detector at the CERN Large Hadron Collider. Events are required to contain at least two electrons or muons, while the third lepton may either be an additional electron or muon, or a hadronically decaying tau lepton. Events are categorized by the presence or absence of a reconstructed tau-lepton or Z-boson candidate decaying to leptons. No significant excess above backgrounds expected from Standard Model processes is observed. Results are presented as upper limits on event yields from non-Standard-Model processes producing at least three prompt, isolated leptons, given as functions of lower bounds on several kinematic variables. Fiducial efficiencies for model testing are also provided. This Rivet module implements the event selection and the fiducial efficiencies to test various models for their exclusion based on observed/excluded limits.

ATLAS_2012_I1204784

Measurement of angular correlations in Drell-Yan lepton pairs to probe $Z/\gamma^*$ boson transverse momentum
Experiment: ATLAS (LHC)
Inspire ID: 1204784
Status: VALIDATED
Authors:
  • Elena Yatsenko
  • Kiran Joshi
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • $Z/\gamma^*$ production with decays to electrons and/or muons.

A measurement of angular correlations in Drell-Yan lepton pairs via the $\phi^*$ observable is presented. This variable probes the same physics as the $Z/\gamma^*$ boson transverse momentum with a better experimental resolution. The $Z/\gamma^* \to ee$ and $Z/\gamma^* \to \mu \mu$ decays produced in proton--proton collisions at a centre-of-mass energy of $\sqrt{s} = 7\;\text{TeV}$ are used. Normalised differential cross sections as a function of $\phi^*$ are measured separately for electron and muon decay channels. The cross-section is also measured double differentially as a function of $\phi^*$ for three independent bins of the $Z$ boson rapidity.

ATLAS_2012_I943401

Search for supersymmetry with 2 leptons and missing transverse energy
Experiment: ATLAS (LHC)
Inspire ID: 943401
Status: VALIDATED
Authors:
  • Peter Richardson
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • BSM signal events at 7000 GeV.

Results of three searches for the production of supersymmetric particles decaying into final states with missing transverse momentum and exactly two isolated leptons, electrons or muons. The analysis uses a data sample collected during the first half of 2011 that corresponds to a total integrated luminosity of 1 $\text{fb}^{-1}$ of $\sqrt{s} = 7$\,TeV proton-proton collisions recorded with the ATLAS detector at the Large Hadron Collider. Opposite-sign and same-sign dilepton events are studied separately. Additionally, in opposite- sign events, a search is made for an excess of same-flavour over different-flavour lepton pairs.

ATLAS_2012_I946427

Search for supersymmetry with diphotons and mising Transverse Momentum
Experiment: ATLAS (LHC)
Inspire ID: 946427
Status: OBSOLETE
Authors:
  • Peter Richardson
References:
  • arXiv: 1111.4116
  • Phys. Lett. B710 (2012) 519-537
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • BSM signal events at 7000 GeV.

Search for diphoton events with large missing transverse momentum with integrated luminosity 1.07$\text{fb}^{-1}$ at $\sqrt{s}=7$. No excess of events was observed.

ATLAS_2013_I1190187

Measurement of the $W^+ W^-$ production cross-section at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1190187
Status: VALIDATED
Authors:
  • Oldrich Kepka
  • Katerina Moudra
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Run with inclusive $W^+ W^-$ events, with $W$ decays to electron + MET, muon + MET, or tau + MET.

Measurement of the fiducial cross section for $W^+ W^-$ production in proton proton collisions at a centre-of mass energy of 7 TeV, is presented, using data corresponding to an integrated luminosity of 4.6/fb collected by the ATLAS experiment at the Large Hadron Collider. The cross section is measured in the leptonic decay channels, using electron+MET and muon+MET $W$ decays. $W \to \tau$ processes with the tau decaying into electron + MET or muon + MET are also included in the measurement. The fiducial region contains dressed leptons in restricted $p_T$ and $\eta$ ranges. The selection has specific requirements for each production channel. A measurement of the normalized fiducial cross section as a function of the leading lepton transverse momentum is also presented.

ATLAS_2013_I1216670

W + DPI at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1216670
Status: VALIDATED
Authors:
  • Tim Martin
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • W + 2 jets (W -> l nu)

The production of $W$ bosons in association with two jets in proton-proton collisions at a centre-of-mass energy of $\sqrt{s} = 7$ TeV has been analysed for the presence of double-parton interactions using data corresponding to an integrated luminosity of 36/pb, collected with the ATLAS detector at the LHC.

ATLAS_2013_I1217863_W

W + gamma production at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1217863
Status: VALIDATED
Authors:
  • Chritian Gutschow
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • W+gamma in the electron channel

Measurements of the differential fiducial cross sections for the production of a W boson in association with a high-energy photon are measured using pp collisions at \sqrt{s}=7 TeV. The analysis uses a data sample with an integrated luminosity of 4.6 fb-1 collected by the ATLAS detector during the 2011 LHC data-taking period. Events are selected using leptonic decays of the W bosons with the requirement of an associated isolated photon. The default routine will consider the electron decay channel of the W boson. Use ATLAS_2013_I1217863_W_EL and ATLAS_2013_I1217863_W_MU to specify the decay channel directly.

ATLAS_2013_I1217863_W_EL

W + gamma production at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1217863
Status: VALIDATED
Authors:
  • Chritian Gutschow
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • W+gamma in the electron channel

Measurements of the differential fiducial cross sections for the production of a W boson in association with a high-energy photon are measured using pp collisions at \sqrt{s}=7 TeV. The analysis uses a data sample with an integrated luminosity of 4.6 fb-1 collected by the ATLAS detector during the 2011 LHC data-taking period. Events are selected using leptonic decays of the W bosons with the requirement of an associated isolated photon. The default routine will consider the electron decay channel of the W boson. Use ATLAS_2013_I1217863_W_EL and ATLAS_2013_I1217863_W_MU to specify the decay channel directly.

ATLAS_2013_I1217863_W_MU

W + gamma production at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1217863
Status: VALIDATED
Authors:
  • Chritian Gutschow
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • W+gamma in the muon channel

Measurements of the differential fiducial cross sections for the production of a W boson in association with a high-energy photon are measured using pp collisions at \sqrt{s}=7 TeV. The analysis uses a data sample with an integrated luminosity of 4.6 fb-1 collected by the ATLAS detector during the 2011 LHC data-taking period. Events are selected using leptonic decays of the W bosons with the requirement of an associated isolated photon. The default routine will consider the electron decay channel of the W boson. Use ATLAS_2013_I1217863_W_EL and ATLAS_2013_I1217863_W_MU to specify the decay channel directly.

ATLAS_2013_I1217863_Z

Z + gamma production at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1217863
Status: VALIDATED
Authors:
  • Chritian Gutschow
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Z+gamma in the electron channel

Measurements of the differential fiducial cross sections for the production of a Z boson in association with a high-energy photon are measured using pp collisions at \sqrt{s}=7 TeV. The analysis uses a data sample with an integrated luminosity of 4.6 fb-1 collected by the ATLAS detector during the 2011 LHC data-taking period. Events are selected using leptonic decays of the Z bosons with the requirement of an associated isolated photon. The default routine will consider the electron decay channel of the Z boson. Use ATLAS_2013_I1217863_Z_EL and ATLAS_2013_I1217863_Z_MU to specify the decay channel directly.

ATLAS_2013_I1217863_Z_EL

Z + gamma production at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1217863
Status: VALIDATED
Authors:
  • Chritian Gutschow
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Z+gamma in the electron channel

Measurements of the differential fiducial cross sections for the production of a Z boson in association with a high-energy photon are measured using pp collisions at \sqrt{s}=7 TeV. The analysis uses a data sample with an integrated luminosity of 4.6 fb-1 collected by the ATLAS detector during the 2011 LHC data-taking period. Events are selected using leptonic decays of the Z bosons with the requirement of an associated isolated photon. The default routine will consider the electron decay channel of the Z boson. Use ATLAS_2013_I1217863_Z_EL and ATLAS_2013_I1217863_Z_MU to specify the decay channel directly.

ATLAS_2013_I1217863_Z_MU

Z + gamma production at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1217863
Status: VALIDATED
Authors:
  • Chritian Gutschow
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Z+gamma in the muon channel

Measurements of the differential fiducial cross sections for the production of a Z boson in association with a high-energy photon are measured using pp collisions at \sqrt{s}=7 TeV. The analysis uses a data sample with an integrated luminosity of 4.6 fb-1 collected by the ATLAS detector during the 2011 LHC data-taking period. Events are selected using leptonic decays of the Z bosons with the requirement of an associated isolated photon. The default routine will consider the electron decay channel of the Z boson. Use ATLAS_2013_I1217863_Z_EL and ATLAS_2013_I1217863_Z_MU to specify the decay channel directly.

ATLAS_2013_I1217867

kT splitting scales in W->lv events
Experiment: ATLAS (LHC)
Inspire ID: 1217867
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • W+jet events in the electron and/or the muon decay channel.

Cluster splitting scales are measured in events containing W bosons decaying to electrons or muons. The measurement comprises the four hardest splitting scales in a kT cluster sequence of the hadronic activity accompanying the W boson, and ratios of these splitting scales.

ATLAS_2013_I1219109

W + b production at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1219109
Status: VALIDATED
Authors:
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • W+b in the electron channel

Measurements of the W+b-jets ($W+b+X$ and $W+b\bar{b}+X$) production cross-section in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC. These results are based on data corresponding to an integrated luminosity of 4.6 $fb^{−1}$, collected with the ATLAS detector. Cross-sections are presented as a function of jet multiplicity and of the transverse momentum of the leading b-jet for both the combined muon and electron decay modes of the W boson. The default routine will consider the electron decay channel of the W boson. Use ATLAS_2013_I1217863_W_EL and ATLAS_2013_I1217863_W_MU to specify the decay channel directly.

ATLAS_2013_I1219109_EL

W + b production at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1219109
Status: VALIDATED
Authors:
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • W+b in the electron channel

Measurements of the W+b-jets ($W+b+X$ and $W+b\bar{b}+X$) production cross-section in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC. These results are based on data corresponding to an integrated luminosity of 4.6 $fb^{−1}$, collected with the ATLAS detector. Cross-sections are presented as a function of jet multiplicity and of the transverse momentum of the leading b-jet for both the combined muon and electron decay modes of the W boson. The default routine will consider the electron decay channel of the W boson. Use ATLAS_2013_I1219109_EL and ATLAS_2013_I1219109_MU to specify the decay channel directly.

ATLAS_2013_I1219109_MU

W + b production at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1219109
Status: VALIDATED
Authors:
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • W+b in the muon channel

Measurements of the W+b-jets ($W+b+X$ and $W+b\bar{b}+X$) production cross-section in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC. These results are based on data corresponding to an integrated luminosity of 4.6 $fb^{−1}$, collected with the ATLAS detector. Cross-sections are presented as a function of jet multiplicity and of the transverse momentum of the leading b-jet for both the combined muon and electron decay modes of the W boson. The default routine will consider the electron decay channel of the W boson. Use ATLAS_2013_I1219109_EL and ATLAS_2013_I1219109_MU to specify the decay channel directly.

ATLAS_2013_I1230812

$Z$ + jets in $pp$ at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1230812
Status: VALIDATED
Authors:
  • Katharina Bierwagen
  • Frank Siegert
References:
  • arXiv: 1304.7098
  • J. High Energy Phys. 07 (2013) 032
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Z+jets, electronic Z-decays (data are a weighted combination of electron/muon).

Measurements of the production of jets of particles in association with a $Z$ boson in $pp$ collisions at $\sqrt{s}$ = 7 TeV are presented, using data corresponding to an integrated luminosity of 4.6/fb collected by the ATLAS experiment at the Large Hadron Collider. Inclusive and differential jet cross sections in $Z$ events, with Z decaying into electron or muon pairs, are measured for jets with transverse momentum $p_T > 30$ GeV and rapidity $|y| < 4.4$. This Rivet module implements the event selection for the weighted combination of both decay channels and uses the data from that combination (as in the paper plots). But for simplification of its usage it only requires events with the electronic final state (muonic final state will be ignored). This allows to use it with either pure electronic samples, or mixed electron/muon events. If you want to use it with a pure muon sample, please refer to ATLAS\_2013\_I1230812\_MU.

ATLAS_2013_I1230812_EL

$Z +$ jets in $pp$ at 7 TeV (electron channel)
Experiment: ATLAS (LHC)
Inspire ID: 1230812
Status: VALIDATED
Authors:
  • Katharina Bierwagen
  • Frank Siegert
References:
  • arXiv: 1304.7098
  • J. High Energy Phys. 07 (2013) 032
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Z+jets, electronic Z-decays

Measurements of the production of jets of particles in association with a Z boson in pp collisions at $\sqrt{s}$ = 7 TeV are presented, using data corresponding to an integrated luminosity of 4.6/fb collected by the ATLAS experiment at the Large Hadron Collider. Inclusive and differential jet cross sections in Z events, with Z decaying into electron or muon pairs, are measured for jets with transverse momentum $p_T > 30$ GeV and rapidity $|y| < 4.4$. This Rivet module implements the event selection for Z decaying into electrons and uses the data measured explicitly in this channel (not the combined results shown in the paper plots). If you want to use muonic events, please refer to ATLAS\_2013\_I1230812\_MU.

ATLAS_2013_I1230812_MU

$Z +$ jets in $pp$ at 7 TeV (muon channel)
Experiment: ATLAS (LHC)
Inspire ID: 1230812
Status: VALIDATED
Authors:
  • Katharina Bierwagen
  • Frank Siegert
References:
  • arXiv: 1304.7098
  • J. High Energy Phys. 07 (2013) 032
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Z+jets, muonic Z-decays

Measurements of the production of jets of particles in association with a Z boson in pp collisions at $\sqrt{s}$ = 7 TeV are presented, using data corresponding to an integrated luminosity of 4.6/fb collected by the ATLAS experiment at the Large Hadron Collider. Inclusive and differential jet cross sections in Z events, with Z decaying into electron or muon pairs, are measured for jets with transverse momentum $p_T > 30$ GeV and rapidity $|y| < 4.4$. This Rivet module implements the event selection for Z decaying into muons and uses the data measured explicitly in this channel (not the combined results shown in the paper plots). If you want to use electronic events, please refer to ATLAS\_2013\_I1230812\_EL.

ATLAS_2013_I1234228

High-mass Drell-Yan at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1234228
Status: VALIDATED
Authors:
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Drell-Yan production in pp collisons at 7 TeV

This Letter reports a measurement of the high-mass Drell-Yan differential cross-section in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC. Based on an integrated luminosity of 4.9 fb$^{-1}$, the differential cross-section in the $Z/\gamma^\ast \rightarrow e^+e^-$ channel is measured with the ATLAS detector as a function of the invariant mass, $m_{ee}$, in the range $116< m_{ee} <1500$ GeV, for a fiducial region in which both the electron and the positron have transverse momentum $p_\text{T}>25$ GeV and pseudorapidity $|\eta|<2.5$. A comparison is made to various event generators and to the predictions of perturbative QCD calculations at next-to-next-to-leading order.

ATLAS_2013_I1243871

Measurement of jet shapes in top quark pair events at $\sqrt{s} = 7$ TeV with ATLAS
Experiment: ATLAS (LHC)
Inspire ID: 1243871
Status: VALIDATED
Authors:
  • Javier Llorente
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Top quark pair production in $pp$ collisions at $\sqrt{s} = 7$ TeV

Measurement of jet shapes in top pair events in the ATLAS 7 TeV run. b-jets are shown to have a wider energy density distribution than light-quark induced jets.

ATLAS_2013_I1244522

Photon + jets
Experiment: ATLAS (LHC)
Inspire ID: 1244522
Status: VALIDATED
Authors:
  • Josu Cantero
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • p + p -> gamma + jet + X

Measurements of isolated photon plus jet production in $pp$ collisions at a centre-of-mass energy of 7 TeV with the ATLAS detector at the LHC using an integrated luminosity of $37 \text{pb}^{-1}$. Differential cross sections are presented as functions of photon transverse energy, jet transverse momentum and jet rapidity. In addition, the differential cross sections as functions of the difference between the azimuthal angles of the photon and the jet, the photon-jet invariant mass as well as the scattering angle in the photon-jet centre-of-mass frame have been measured.

ATLAS_2013_I1263495

Inclusive isolated prompt photon analysis with 2011 LHC data
Experiment: ATLAS (LHC 7TeV)
Inspire ID: 1263495
Status: VALIDATED
Authors:
  • Giovanni Marchiori
References:
  • arXiv: 1311.1440
  • Phys.Rev. D89 (2014) 052004
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Inclusive photon $+ X$ events (primary $\gamma$+jet events) at $\sqrt{s} = 7$ TeV.

A measurement of the cross section for the production of isolated prompt photons in pp collisions at a center-of-mass energy $sqrt{s} = 7$ TeV is presented. The results are based on an integrated luminosity of 4.6 fb$^{-1}$ collected with the ATLAS detector at the LHC. The cross section is measured as a function of photon pseudorapidity $\eta^\gamma$ and transverse energy $E_T^\gamma$ in the kinematic range $100 < E_T^\gamma < 1000$ GeV and in the regions $|\eta^\gamma| < 1.37$ and $1.52 < |\eta^\gamma| < 2.37$. The results are compared to leading-order parton-shower Monte Carlo models and next-to-leading order perturbative QCD calculations. Next to-leading-order perturbative QCD calculations agree well with the measured cross sections as a function of $E_T^\gamma$ and $\eta^\gamma$.

ATLAS_2014_I1268975

High-mass dijet cross section
Experiment: ATLAS (LHC)
Inspire ID: 1268975
Status: VALIDATED
Authors:
  • Christopher Meyer
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • QCD jet production with a minimum leading jet pT of 100 GeV and minimum second jet pT of 50 GeV at 7 TeV.

Double-differential dijet cross sections measured in pp collisions at the LHC with a 7 TeV centre-of-mass energy are presented as functions of dijet mass and rapidity separation of the two highest-pT jets. These measurements are obtained using data corresponding to an integrated luminosity of 4.5/fb, recorded by the ATLAS detector in 2011. The data are corrected for detector effects so that cross sections are presented at the particle level. Cross sections are measured up to 5 TeV dijet mass using jets reconstructed with the anti-kt algorithm for values of the jet radius parameter of 0.4 and 0.6. The cross sections are compared with next-to-leading-order perturbative QCD calculations by NLOJET++ corrected to account for non-perturbative effects. Comparisons with POWHEG predictions, using a next-to-leading-order matrix element calculation interfaced to a parton-shower Monte Carlo simulation, are also shown. Electroweak effects are accounted for in both cases. The quantitative comparison of data and theoretical predictions obtained using various parameterizations of the parton distribution functions is performed using a frequentist method. An example setting a lower limit on the compositeness scale for a model of contact interactions is presented, showing that the unfolded results can be used to constrain contributions to dijet production beyond that predicted by the Standard Model.

ATLAS_2014_I1279489

Measurements of electroweak production of dijets + $Z$ boson, and distributions sensitive to vector boson fusion
Experiment: ATLAS (LHC)
Inspire ID: 1279489
Status: VALIDATED
Authors:
  • Kiran Joshi
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • Generate $Z$+jets events at 8 TeV, with $Z$ decaying to muons or electrons and $pT(j1)>55$ GeV, $pT(j2)>45$ GeV.

Measurements differential distributions for inclusive $Z$-boson-plus-dijet production are performed in five fiducial regions, each with different sensitivity to the electroweak contribution. Measured distributions include the differential cross section as a function of the dijet invariant mass, the differential cross section and a function of the dijet rapidity separation, the differential cross section as a function of the number of jets in the rapidity interval bounded by the two leading jets. Other measurements include the jet veto effiency as a function of the dijet invariant mass and rapdity separation, the normalized transverse momentum balance cut efficiency, and the average number of jets falling into the rapidity interval boundd by the two leading jets, as a function of dijet invariant mass and dijet rapidity separation.

ATLAS_2014_I1282441

The differential production cross section of the $\phi(1020)$ meson in $\sqrt{s}=7$ TeV $pp$ collisions measured with the ATLAS detector
Experiment: ATLAS (LHC)
Inspire ID: 1282441
Status: VALIDATED
Authors:
  • Tim Martin
  • Kiran Joshi
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Run minimum bias events

A measurement is presented of the $\phi \rightarrow K^+K^-$ production cross section at $\sqrt{s}$ = 7 TeV using pp collision data corresponding to an integrated luminosity of 383 $\mu$b$^{-1}$ collected with the ATLAS experiment at the LHC. Selection of $\phi(1020)$ mesons is based on the identification of charged kaons by their energy loss in the pixel detector. The differential cross section is measured as a function of the transverse momentum, $pT,\phi$, and rapidity, $y_\phi$, of the $\phi(1020)$ meson in the fiducial region 500 < $pT,\phi$ < 1200 MeV, |$y_\phi$| < 0.8, kaon $pT,K$ > 230 MeV and kaon momentum $p_K$ < 800 MeV. The integrated $\phi(1020)$ production cross section in this fiducial range is measured to be $\sigma_{\phi \rightarrow K^+K^-}$ = 570 \pm 8 (stat) \pm 66 (syst) \pm 20 (lumi) $\mu$b.

ATLAS_2014_I1282447

W + charm production at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1282447
Status: VALIDATED
Authors:
  • Kristin Lohwasser
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • W+c and inclusive double production in pp collisions

This routine implements the measurement of $W$ boson production in association with a single charm quark with $4.6 \text{fb}^{-1}$ of $pp$ collision data at $\sqrt{s} = 7$ TeV collected with the ATLAS detector at the Large Hadron Collider. Results are quoted for the $W$ boson production decaying into either an electron or muon and the charm quark being identified as any charmed hadron above 5 GeV inside $\Delta R = 0.4$ of a jet with more than 25 GeV. Alternatively the presence of the charm quark is indicated by the presence of a $D$ or a $D^*$ meson with a $p_\text{T}$ above 8 GeV. The cross sections are quoted for the number of opposite sign minus same sign events, where the signs under consideration are the charge of the $W$ boson and the charmed hadrons tagging the event. Given are the integrated and differential cross sections as a function of the pseudorapidity of the lepton from the $W$-boson decay are measured. Additionally, the cross-section ratios $\sigma(W^+ + bar{c}) / \sigma(W^- + c)$ as well as the $p_\text{T}$ dependent cross sections of the $D$/$D^*$ mesons normalized to the $W$ inclusive cross sections are published. The measured data is unfolded to the Born level. One should therefore take care to run on samples without QED radiation off of the electrons. IMPORTANT NOTICE --- For the MC predictions in the paper, the branching fractions to $D$ and $D^*$ mesons have been adapted to be 0.2256 ($D$) and 0.2287 ($D^*$) (LEP/HERA combination). Some suggestion on how to do post-processing -- in case separate samples for $W^+ + c$ and $W^- + c$ and inclusive $W$ are used -- are included in the cc-file. This post-processing is needed to properly display the histograms for the cross section ratio plots $\sigma(W^+ + bar{c}) / \sigma(W^- + c)$ as well as for the cross section ratios of $W + D^{(*)}$ production over inclusive $W$ production ($\sigma(W^{+/-} D^{(*)}) / \sigma(W^{+/-})$) as a function of the $D^{(*)}$ meson transverse momentum.

ATLAS_2014_I1288706

Measurement of the low-mass Drell-Yan differential cross section at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1288706
Status: VALIDATED
Authors:
  • Elena Yatsenko
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Run with inclusive $Z$ events, with $Z/\gamma^*$ decays to electrons and/or muons at $\sqrt{s} = 7$ TeV.

Measurements of the differential cross section for the process $Z/\gamma^\ast \rightarrow l$ $(l = e, \mu)$ as a function of dilepton invariant mass in pp collisions at $\sqrt{s} = 7$ TeV. The measurement is performed in the $e$ and $\mu$ channels for invariant masses between 26 GeV and 66 GeV in the fiducial region $p_\text{T}^\text{leading} > 15$ GeV, $p_\text{T}^\text{subleading} > 12$ GeV, $|\eta| < 2.4$ using an integrated luminosity of 1.6 $\text{fb}^{-1}$. The analysis is extended to invariant masses as low as 12 GeV in the muon channel within a fiducal region of $p_\text{T}^\text{leading} > 9$ GeV, $p_\text{T}^\text{subleading} > 6$ GeV, $|\eta| < 2.4$ with 35 $\text{pb}^{-1}$.

ATLAS_2014_I1298023

Same-sign WW cross section
Experiment: ATLAS (LHC)
Inspire ID: 1298023
Status: VALIDATED
Authors:
  • Simone Pagan Griso
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • p + p -> W W j j, where the W bosons decay leptonically

First measurement of $W^\pm W^\pm jj$, same-electric-charge diboson production in association with two jets, using $20.3 {\rm fb}^{-1}$ of proton-proton collision data at $\sqrt{s} = 8$\,TeV recorded by the ATLAS detector at the Large Hadron Collider. Events with two reconstructed same-charge leptons ($e^\pm e^\pm$, $e^\pm \mu^\pm$, and $\mu^\pm \mu^\pm$) and two or more jets are analyzed. Production cross sections are measured in two fiducial regions, with different sensitivities to the electroweak and strong production mechanisms. First evidence for $W^\pm W^\pm j j$ production and electroweak-only $W^\pm W^\pm jj$ production is observed with a significance of 4.5 and 3.6 standard deviations, respectively.

ATLAS_2014_I1298811

Leading jet underlying event at 7 TeV in ATLAS
Experiment: ATLAS (LHC)
Inspire ID: 1298811
Status: VALIDATED
Authors:
  • Andy Buckley
References:
  • arXiv: 1406.0392
  • Eur.Phys.J. C74 (2014) 2965
  • DOI:10.1140/epjc/s10052-014-2965-5
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • pp QCD interactions at 7 TeV, recommended weighted and enhanced in lead jet pT.

Underlying event measurements with the ATLAS detector at the LHC at a center-of-mass energy of 7 TeV, using the leading jet for event azimuthal orientation and constructing standard transverse region observables from both charged tracks and calorimeter clusters.

ATLAS_2014_I1300647

Measurement of $Z/\gamma^*$ boson $p_T$ at $\sqrt{s} = 7\text{TeV}$
Experiment: ATLAS (LHC)
Inspire ID: 1300647
Status: VALIDATED
Authors:
  • Elena Yatsenko
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • $Z/\gamma^*$ production with decays to electrons and/or muons.

A measurement of the $Z/\gamma^*$ transverse momentum spectrum using ATLAS proton-proton collision data at a center of mass energy of $\sqrt{s} = 7{\text{TeV}}$ at the LHC. The measurement is performed in both $Z/\gamma^* \rightarrow ee$ and $Z/\gamma^* \rightarrow \mu \mu$ channels.

ATLAS_2014_I1304688

Measurement of jet multiplicity and transverse momentum spectra in top events using full 7 TeV ATLAS dataset
Experiment: ATLAS (LHC)
Inspire ID: 1304688
Status: VALIDATED
Authors:
  • W. H. Bell
  • A. Grohsjean
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • ttbar events with at least one lepton in the ttbar final state at 7 TeV, i.e. both semileptonic and dileptonic decays should be enabled. The tau decay channels also count as leptonic.

Measurement of the differential t$\bar{\mathrm t}$ production cross-section in 7 TeV proton-proton collisions in the single-lepton channel from ATLAS. The data comprise the full 2011 data sample corresponding to an integrated luminosity of $4.6\,\mathrm{fb}^{-1}$. The differential cross-sections are measured as a function of the jet multiplicity for up to eight jets using jet transverse momentum thresholds of 25, 40, 60, and 80 GeV, and as a function of jet transverse momentum up to the fifth leading jet. The results after background subtraction are corrected for all detector effects, within a kinematic range closely matched to the experimental acceptance.

ATLAS_2014_I1306294

Measurement of Z boson in association with b-jets at 7 TeV in ATLAS (electron channel)
Experiment: ATLAS (LHC)
Inspire ID: 1306294
Status: VALIDATED
Authors:
  • Gavin Hesketh
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Z+b(b) production in $pp$ collisions at $\sqrt{s} = 7$ TeV, electronic Z-decays

Measurements of differential production cross-sections of a $Z$ boson in association with $b$-jets in $pp$ collisions at $\sqrt{s}=7$ TeV are reported. The data analysed correspond to an integrated luminosity of 4.6 fb$^{-1}$ recorded with the ATLAS detector at the Large Hadron Collider. Particle-level cross-sections are determined for events with a $Z$ boson decaying into an electron or muon pair, and containing $b$-jets. For events with at least one $b$-jet, the cross-section is presented as a function of the $Z$ boson transverse momentum and rapidity, together with the inclusive $b$-jet cross-section as a function of $b$-jet transverse momentum, rapidity and angular separations between the $b$-jet and the $Z$ boson. For events with at least two $b$-jets, the cross-section is determined as a function of the invariant mass and angular separation of the two highest transverse momentum $b$-jets, and as a function of the $Z$ boson transverse momentum and rapidity. Results are compared to leading-order and next-to-leading-order perturbative QCD calculations. This Rivet module implements the event selection for Z decaying into electrons. If you want to use muonic events, please refer to ATLAS\_2014\_I1306294\_MU

ATLAS_2014_I1306294_EL

Measurement of Z boson in association with b-jets at 7 TeV in ATLAS, (electron channel)
Experiment: ATLAS (LHC)
Inspire ID: 1306294
Status: VALIDATED
Authors:
  • Gavin Hesketh
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Z+b(b) production in $pp$ collisions at $\sqrt{s} = 7$ TeV, electronic Z-decays

Measurements of differential production cross-sections of a $Z$ boson in association with $b$-jets in $pp$ collisions at $\sqrt{s}=7$ TeV are reported. The data analysed correspond to an integrated luminosity of 4.6 fb$^{-1}$ recorded with the ATLAS detector at the Large Hadron Collider. Particle-level cross-sections are determined for events with a $Z$ boson decaying into an electron or muon pair, and containing $b$-jets. For events with at least one $b$-jet, the cross-section is presented as a function of the $Z$ boson transverse momentum and rapidity, together with the inclusive $b$-jet cross-section as a function of $b$-jet transverse momentum, rapidity and angular separations between the $b$-jet and the $Z$ boson. For events with at least two $b$-jets, the cross-section is determined as a function of the invariant mass and angular separation of the two highest transverse momentum $b$-jets, and as a function of the $Z$ boson transverse momentum and rapidity. Results are compared to leading-order and next-to-leading-order perturbative QCD calculations. This Rivet module implements the event selection for Z decaying into electrons. If you want to use muonic events, please refer to ATLAS\_2014\_I1306294\_MU

ATLAS_2014_I1306294_MU

Measurement of Z boson in association with b-jets at 7 TeV in ATLAS (muon channel)
Experiment: ATLAS (LHC)
Inspire ID: 1306294
Status: VALIDATED
Authors:
  • Gavin Hesketh
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Z+b(b) production in $pp$ collisions at $\sqrt{s} = 7$ TeV, muonic Z-decays

Measurements of differential production cross-sections of a $Z$ boson in association with $b$-jets in $pp$ collisions at $\sqrt{s}=7$ TeV are reported. The data analysed correspond to an integrated luminosity of 4.6 fb$^{-1}$ recorded with the ATLAS detector at the Large Hadron Collider. Particle-level cross-sections are determined for events with a $Z$ boson decaying into an electron or muon pair, and containing $b$-jets. For events with at least one $b$-jet, the cross-section is presented as a function of the $Z$ boson transverse momentum and rapidity, together with the inclusive $b$-jet cross-section as a function of $b$-jet transverse momentum, rapidity and angular separations between the $b$-jet and the $Z$ boson. For events with at least two $b$-jets, the cross-section is determined as a function of the invariant mass and angular separation of the two highest transverse momentum $b$-jets, and as a function of the $Z$ boson transverse momentum and rapidity. Results are compared to leading-order and next-to-leading-order perturbative QCD calculations. This Rivet module implements the event selection for Z decaying into muons. If you want to use electronic events, please refer to ATLAS\_2014\_I1306294\_EL

ATLAS_2014_I1306615

Higgs diphoton events at 8 TeV in ATLAS
Experiment: ATLAS (LHC)
Inspire ID: 1306615
Status: VALIDATED
Authors:
  • Michaela Queitsch-Maitland
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • pp Higgs production at 8 TeV, include all processes (ggH, VH, VBF, ttH)

Measurements of fiducial and differential cross sections are presented for Higgs boson production in proton-proton collisions at a centre-of-mass energy of 8TeV. The analysis is performed in the Higgs diphoton decay channel using 20.3/fb of data recorded by the ATLAS experiment at the CERN Large Hadron Collider. The signal yields are corrected for the effects of detector inefficiency and resolution. Differential cross sections are also presented, as a function of variables related to the diphoton kinematics and the jet activity produced in the Higgs boson events. The observed spectra are statistically limited but broadly in line with the theoretical expectations.

ATLAS_2014_I1307243

Measurements of jet vetoes and azimuthal decorrelations in dijet events produced in pp collisions at $\sqrt{s}$ = 7 TeV using the ATLAS detector
Experiment: ATLAS (LHC)
Inspire ID: 1307243
Status: VALIDATED
Authors:
  • James Robinson
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • pp -> jet jet x. sqrt(s) = 7000 GeV. Jets with pT > 60, 50 GeV

Additional jet activity in dijet events is measured using $pp$ collisions at ATLAS at a centre-of-mass energy of 7 TeV, for jets reconstructed using the anti-kt algorithm with radius parameter R=0.6. This is done using variables such as the fraction of dijet events without an additional jet in the rapidity interval bounded by the dijet subsystem and correlations between the azimuthal angles of the dijets. They are presented, both with and without a veto on additional jet activity in the rapidity interval, as a function of the mean transverse momentum of the dijets and of the rapidity interval size. The double differential dijet cross section is also measured as a function of the interval size and the azimuthal angle between the dijets. These variables probe differences in the approach to resummation of large logarithms when performing QCD calculations. The data are compared to POWHEG, interfaced to the PYTHIA 8 and HERWIG parton shower generators, as well as to HEJ with and without interfacing it to the ARIADNE parton shower generator. None of the theoretical predictions agree with the data across the full phase-space considered; however, POWHEG+PYTHIA 8 and HEJ+ARIADNE are found to provide the best agreement with the data. These measurements use the full data sample collected with the ATLAS detector in 7 TeV $pp$ collisions at the LHC and correspond to integrated luminosities of 36.1 pb$^-1$ and 4.5 fb$^-1$ for data collected during 2010 and 2011 respectively.

ATLAS_2014_I1307756

Search for scalar diphoton resonances in ATLAS at $\sqrt{s} = 8$ \text{TeV}
Experiment: ATLAS (LHC 8 TeV)
Inspire ID: 1307756
Status: VALIDATED
Authors:
  • Jessica Leveque
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • Inclusive diphotons events at $\sqrt(s)$ = 8 TeV

A search for narrow resonances $m_X$ decaying into two photons in the mass range $65 < mX < 600$ GeV was performed using 20.3 inverse femtobarns of $pp$ collisions data collected by the ATLAS experiment at the Large Hadron Collider. The results are presented as a model-independent limit on the fiducial production cross-section of a scalar boson times branching ratio into two photons. This routine applies the fiducial cuts on the photons (kinematic cuts and isolation cuts) and computes the fiducial cross-section. The total cross-section times branching ratio to two photons must be given as input to the routine.

ATLAS_2014_I1312627

Ratios of $V$+jets observables between $W$ and $Z$ events
Experiment: ATLAS (LHC)
Inspire ID: 1312627
Status: VALIDATED
Authors:
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Inclusive $W$ and inclusive $Z$ in both electron and muon channels

Measurements of the ratio of the production cross sections for $W$ and $Z$ bosons in association with jets in proton–proton collisions at $\sqrt{s} = 7$ TeV with the ATLAS experiment at the Large Hadron Collider. The measurement is based on the entire 2011 dataset, corresponding to an integrated luminosity of 4.6fb−1. Inclusive and differential cross-section ratios for massive vector bosons decaying to electrons and muons are measured in association with jets with transverse momentum $p_\text{T} > 30$ GeV and jet rapidity $|y| < 4.4$. The default routine will pick up the electron decay channel of the heavy bosons and compare it to the combined (muon and electron channel) data. Individual channels (for data) are available as well, use ATLAS_2014_I1312627_EL and ATLAS_2014_I1312627_MU to specify the decay channel directly. NB #1: The "x01" Scatter2D objects are constructed from the ratio of "x02" to "x03" Histo1D objects. If several output yoda files are merged with yodamerge, the merged "x01" objects will become meaningless. New "x01" Scatter2Ds can easil be constructed in a postprocessing step from the merged "x02" (nominator) and "x03" (denominator) objects. NB #2: Special care ought to be taken when evaluating theoretical uncertainties due to potential cancellations/correlations between numerator and denominator.

ATLAS_2014_I1312627_EL

Ratios of $V$+jets observables between $W$ and $Z$ events, electron channel
Experiment: ATLAS (LHC)
Inspire ID: 1312627
Status: VALIDATED
Authors:
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Inclusive $W$ and inclusive $Z$ in the electron channel

Measurements of the ratio of the production cross sections for $W$ and $Z$ bosons in association with jets in proton–proton collisions at $\sqrt{s} = 7$ TeV with the ATLAS experiment at the Large Hadron Collider. The measurement is based on the entire 2011 dataset, corresponding to an integrated luminosity of 4.6fb−1. Inclusive and differential cross-section ratios for massive vector bosons decaying to electrons and muons are measured in association with jets with transverse momentum $p_\text{T} > 30$ GeV and jet rapidity $|y| < 4.4$. The default routine will pick up the electron decay channel of the heavy bosons and compare it to the combined (muon and electron channel) data. Individual channels (for data) are available as well, use ATLAS_2014_I1312627_EL and ATLAS_2014_I1312627_MU to specify the decay channel directly. NB #1: The "x01" Scatter2D objects are constructed from the ratio of "x02" to "x03" Histo1D objects. If several output yoda files are merged with yodamerge, the merged "x01" objects will become meaningless. New "x01" Scatter2Ds can easil be constructed in a postprocessing step from the merged "x02" (nominator) and "x03" (denominator) objects. NB #2: Special care ought to be taken when evaluating theoretical uncertainties due to potential cancellations/correlations between numerator and denominator.

ATLAS_2014_I1312627_MU

Ratios of $V$+jets observables between $W$ and $Z$ events, muon channel
Experiment: ATLAS (LHC)
Inspire ID: 1312627
Status: VALIDATED
Authors:
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Inclusive $W$ and inclusive $Z$ in the muon channel

Measurements of the ratio of the production cross sections for $W$ and $Z$ bosons in association with jets in proton–proton collisions at $\sqrt{s} = 7$ TeV with the ATLAS experiment at the Large Hadron Collider. The measurement is based on the entire 2011 dataset, corresponding to an integrated luminosity of 4.6fb−1. Inclusive and differential cross-section ratios for massive vector bosons decaying to electrons and muons are measured in association with jets with transverse momentum $p_\text{T} > 30$ GeV and jet rapidity $|y| < 4.4$. The default routine will pick up the electron decay channel of the heavy bosons and compare it to the combined (muon and electron channel) data. Individual channels (for data) are available as well, use ATLAS_2014_I1312627_EL and ATLAS_2014_I1312627_MU to specify the decay channel directly. NB #1: The "x01" Scatter2D objects are constructed from the ratio of "x02" to "x03" Histo1D objects. If several output yoda files are merged with yodamerge, the merged "x01" objects will become meaningless. New "x01" Scatter2Ds can easil be constructed in a postprocessing step from the merged "x02" (nominator) and "x03" (denominator) objects. NB #2: Special care ought to be taken when evaluating theoretical uncertainties due to potential cancellations/correlations between numerator and denominator.

ATLAS_2014_I1315949

Distributions sensitive to the underlying event in inclusive Z-boson production at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1315949
Status: VALIDATED
Authors:
  • Deepak Kar
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • p + p -> Z + X ( Z -> mu^+ mu^- or e^+ e^- ). \sqrt{s} = 7 TeV

Charged-particle distributions sensitive to the properties of the underlying event are measured for an inclusive sample of events containing a $Z$-boson, decaying to an electron or muon pair. The measurement is based on data collected using the ATLAS detector at the LHC in proton–proton collisions at a centre-of-mass energy of 7 TeV with an integrated luminosity of 4.6 $\text{fb}^{−1}$. Distributions of the charged particle multiplicity and of the charged particle transverse momentum are measured in regions of azimuthal angle defined with respect to the $Z$-boson direction.

ATLAS_2014_I1319490

W + jets
Experiment: ATLAS (LHC)
Inspire ID: 1319490
Status: VALIDATED
Authors:
  • Matthew Mondragon
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • inclusive W production in the electron channel

Measurements of cross sections for the production of a $W$ boson in association with jets in proton–proton collisions at $\sqrt{s} = 7$ TeV with the ATLAS experiment at the Large Hadron Collider. With an integrated luminosity of 4.6 $\text{fb}^{−1}$, this data set allows for an exploration of a large kinematic range, including jet production up to a transverse momentum of 1 TeV and multiplicities up to seven associated jets. The production cross sections for W bosons are measured in both the electron and muon decay channels. Differential cross sections for many observables are also presented including measurements of the jet observables such as the rapidities and the transverse momenta as well as measurements of event observables such as the scalar sums of the transverse momenta of the jets. The default routine will pick up the electron decay channel of the $W$ boson and compare it to the combined (muon and electron channel) data. Individual channels (for data) are available as well, use ATLAS_2014_I1312627_EL and ATLAS_2014_I1312627_MU to specify the decay channel directly.

ATLAS_2014_I1319490_EL

W + jets
Experiment: ATLAS (LHC)
Inspire ID: 1319490
Status: VALIDATED
Authors:
  • Matthew Mondragon
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • inclusive W production in the electron channel

Measurements of cross sections for the production of a $W$ boson in association with jets in proton–proton collisions at $\sqrt{s} = 7$ TeV with the ATLAS experiment at the Large Hadron Collider. With an integrated luminosity of 4.6 $\text{fb}^{−1}$, this data set allows for an exploration of a large kinematic range, including jet production up to a transverse momentum of 1 TeV and multiplicities up to seven associated jets. The production cross sections for W bosons are measured in both the electron and muon decay channels. Differential cross sections for many observables are also presented including measurements of the jet observables such as the rapidities and the transverse momenta as well as measurements of event observables such as the scalar sums of the transverse momenta of the jets. The default routine will pick up the electron decay channel of the $W$ boson and compare it to the combined (muon and electron channel) data. Individual channels (for data) are available as well, use ATLAS_2014_I1312627_EL and ATLAS_2014_I1312627_MU to specify the decay channel directly.

ATLAS_2014_I1319490_MU

W + jets
Experiment: ATLAS (LHC)
Inspire ID: 1319490
Status: VALIDATED
Authors:
  • Matthew Mondragon
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • inclusive W production in the muon channel

Measurements of cross sections for the production of a $W$ boson in association with jets in proton–proton collisions at $\sqrt{s} = 7$ TeV with the ATLAS experiment at the Large Hadron Collider. With an integrated luminosity of 4.6 $\text{fb}^{−1}$, this data set allows for an exploration of a large kinematic range, including jet production up to a transverse momentum of 1 TeV and multiplicities up to seven associated jets. The production cross sections for W bosons are measured in both the electron and muon decay channels. Differential cross sections for many observables are also presented including measurements of the jet observables such as the rapidities and the transverse momenta as well as measurements of event observables such as the scalar sums of the transverse momenta of the jets. The default routine will pick up the electron decay channel of the $W$ boson and compare it to the combined (muon and electron channel) data. Individual channels (for data) are available as well, use ATLAS_2014_I1312627_EL and ATLAS_2014_I1312627_MU to specify the decay channel directly.

ATLAS_2014_I1325553

Measurement of the inclusive jet cross-section at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1325553
Status: VALIDATED
Authors:
  • Vojtech Pleskot
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • p p -> jet + X. $\sqrt{s} = 7$ TeV.

Measurement of the inclusive jet cross-section in proton--proton collisions at a centre-of-mass energy of 7 TeV using a data set corresponding to an integrated luminosity of 4.5/fb collected with the ATLAS detector at the Large Hadron Collider in 2011. Jets are identified using the anti-$k_t$ algorithm with radius parameter values of 0.4 and 0.6. The double-differential cross-sections are presented as a function of the jet transverse momentum and the jet rapidity, covering jet transverse momenta from 100 GeV to 2 TeV.

ATLAS_2014_I1326641

3-jet cross section with 7 TeV data
Experiment: ATLAS (LHC)
Inspire ID: 326641
Status: VALIDATED
Authors:
  • Aliaksei Hrynevich
  • Pavel Starovoitov
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • QCD jet production with at least three leading jets

Double-differential three-jet production cross-sections have been measured in proton-proton collisions at a centre-of-mass energy of $\sqrt{s} = 7\,$TeV using the ATLAS detector at the Large Hadron Collider. The measurements are presented as a function of the three-jet mass ($m_{jjj}$), in bins of the sum of the absolute rapidity separations between the three leading jets ($\left|Y^\ast\right|$). Invariant masses extending up to 5\,TeV are reached for $8<\left|Y^\ast\right|<10$. These measurements use a sample of data recorded using the ATLAS detector in 2011, which corresponds to an integrated luminosity of $4.51\,\text{fb}^{-1}$. Jets are identified using the anti-$k_\text{t}$ algorithm with two different jet radius parameters, $R=0.4$ and $R=0.6$.

ATLAS_2014_I1327229

Inclusive multilepton search at 8 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1327229
Status: VALIDATED
Authors:
  • Joern Mahlstedt
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • Any process producing at least 3 leptons (e.g. pair production of doubly-charged Higgs or excited leptons)

A generic search for anomalous production of events with at least three charged leptons is presented. The data sample consists of $pp$ collisions at $\sqrt{s} = 8$\,TeV collected in 2012 by the ATLAS experiment at the CERN Large Hadron Collider, and corresponds to an integratedi luminosity of 20.3\,$\text{fb}^{−1}$. Events are required to have at least three selected lepton candidates, at least two of which must be electrons or muons, while the third may be a hadronically decaying tau. Selected events are categorized based on their lepton flavour content and signal regions are constructed using several kinematic variables of interest. No significant deviations from Standard Model predictions are observed. Model-independent upper limits on contributions from beyond the Standard Model phenomena are provided for each signal region, along with prescription to re-interpret the limits for any model. Constraints are also placed on models predicting doubly charged Higgs bosons and excited leptons. For doubly charged Higgs bosons decaying to $e\tau$ or $\muon\tau$, lower limits on the mass are set at 400\,GeV at 95\,\% confidence level. For excited leptons, constraints are provided as functions of both the mass of the excited state and the compositeness scale $\Lambda$, with the strongest mass constraints arising in regions where the mass equals $\Lambda$. In such scenarios, lower mass limits are set at 3.0\,TeV for excited electrons and muons, 2.5\,TeV for excited taus, and 1.6\,TeV for every excited-neutrino flavour.

ATLAS_2015_CONF_2015_041

Z+jets at 13 TeV
Experiment: ATLAS (LHC)
Inspire ID: None
Status: OBSOLETE
Authors:
  • Christian Gutschow
References:
  • ATLAS-CONF-2015-041
Beams: p+ p+
Beam energies: (6500.0, 6500.0) GeV
Run details:
  • inclusive Z production in the electron channel

Preliminary measurements of the cross section for the production of a $Z$ boson in association with jets in pp collisions at $\sqrt{s} = 13$\,TeV are presented, using data corresponding to an integrated luminosity of $85\,\text{pb}^{-1}$ collected by the ATLAS experiment at the Large Hadron Collider. The cross sections are measured for events containing a $Z$ boson decaying to electrons or muons and produced in association with up to four jets in the kinematical range of $p_\text{T} > 30$\,GeV and $|y| < 2.5$. NB--Use the pliugin names ATLAS_2015_CONF_2015_041_EL or ATLAS_2015_CONF_2015_041_MU to specify the lepton channel. Note -- this analysis is superseeded by ATLAS_2017_I1514251

ATLAS_2015_CONF_2015_041_EL

Z+jets at 13 TeV
Experiment: ATLAS (LHC)
Inspire ID: None
Status: PRELIMINARY
Authors:
  • Christian Gutschow
References:
  • ATLAS-CONF-2015-041
Beams: p+ p+
Beam energies: (6500.0, 6500.0) GeV
Run details:
  • inclusive Z production in the electron channel

Preliminary measurements of the cross section for the production of a $Z$ boson in association with jets in pp collisions at $\sqrt{s} = 13$\,TeV are presented, using data corresponding to an integrated luminosity of $85\,\text{pb}^{-1}$ collected by the ATLAS experiment at the Large Hadron Collider. The cross sections are measured for events containing a $Z$ boson decaying to electrons or muons and produced in association with up to four jets in the kinematical range of $p_\text{T} > 30$\,GeV and $|y| < 2.5$. NB--Use the plugin names ATLAS_2015_CONF_2015_041_EL or ATLAS_2015_CONF_2015_041_MU to specify the lepton channel.

ATLAS_2015_CONF_2015_041_MU

Z+jets at 13 TeV
Experiment: ATLAS (LHC)
Inspire ID: None
Status: PRELIMINARY
Authors:
  • Christian Gutschow
References:
  • ATLAS-CONF-2015-041
Beams: p+ p+
Beam energies: (6500.0, 6500.0) GeV
Run details:
  • inclusive Z production in the muon channel

Preliminary measurements of the cross section for the production of a $Z$ boson in association with jets in pp collisions at $\sqrt{s} = 13$\,TeV are presented, using data corresponding to an integrated luminosity of $85\,\text{pb}^{-1}$ collected by the ATLAS experiment at the Large Hadron Collider. The cross sections are measured for events containing a $Z$ boson decaying to electrons or muons and produced in association with up to four jets in the kinematical range of $p_\text{T} > 30$\,GeV and $|y| < 2.5$. NB--Use the plugin names ATLAS_2015_CONF_2015_041_EL or ATLAS_2015_CONF_2015_041_MU to specify the lepton channel.

ATLAS_2015_I1345452

Pseudo-top-antitop cross sections
Experiment: ATLAS (LHC)
Inspire ID: 1345452
Status: VALIDATED
Authors:
  • Longen Lan
  • Aldo Saavedra
  • Kevin Finelli
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • top-antitop production, reconstructed from leptons + jets final state

Various differential cross-sections are measured in top-quark pair ($t\bar{t}$) events produced in proton-proton collisions at a centre-of-mass energy of $\sqrt{s}=7$ TeV at the LHC with the ATLAS detector. These differential cross-sections are presented in a data set corresponding to an integrated luminosity of 4.6 fb$^{-1}$. The differential cross-sections are presented in terms of kinematic variables of a top-quark proxy referred to as the pseudo-top-quark whose dependence on theoretical models is minimal. The pseudo-top-quark can be defined in terms of either reconstructed detector objects or stable particles in an analogous way. The measurements are performed on $t\bar{t}$ events in the lepton+jets channel, requiring exactly one charged lepton and at least four jets with at least two of them tagged as originating from a $b$-quark. The hadronic and leptonic pseudo-top-quarks are defined via the leptonic or hadronic decay mode of the W boson produced by the top-quark decay in events with a single charged lepton. The cross-section is measured as a function of the transverse momentum and rapidity of both the hadronic and leptonic pseudo-top-quark as well as the transverse momentum, rapidity and invariant mass of the pseudo-top-quark pair system. The measurements are corrected for detector effects and are presented within a kinematic range that closely matches the detector acceptance.

ATLAS_2015_I1351916

$Z$ forward-backward asymmetry
Experiment: ATLAS (LHC)
Inspire ID: 1351916
Status: VALIDATED
Authors:
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Inclusive $Z$ in the electron channel

Measurements from the ATLAS experiment of the forward-backward asymmetry in the reaction $pp \rightarrow Z / \gamma^\ast \rightarrow \ell^+\ell^-$, with $\ell$ being electrons or muons. The results are based on the full set of data collected in 2011 in $pp$ collisions at the LHC at $\sqrt{s} = 7$ TeV, corresponding to an integrated luminosity of 4.8 $\text{fb}^{-1}$. The measured asymmetry values are found to be in agreement with the corresponding Standard Model predictions. The default routine will pick up the electron decay channel of the $Z$ boson. Individual channels can be specified directly with the plugins ATLAS_2014_I1312627_EL and ATLAS_2014_I1312627_MU, respectively. N.B. When running on multiple files, the asymmetry might have to be reconstructed in a post-processing step. To that end, the necessary Histo1D objects are written out as well. The asymmetry is a Scatter2D objects ending in y01 and is constructed from the Histo1D objects (ending in y02 and y03) in the following way: y01 = (y02 - y03) / (y02 + y03)

ATLAS_2015_I1351916_EL

$Z$ forward-backward asymmetry
Experiment: ATLAS (LHC)
Inspire ID: 1351916
Status: VALIDATED
Authors:
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Inclusive $Z$ in the electron channel

Measurements from the ATLAS experiment of the forward-backward asymmetry in the reaction $pp \rightarrow Z / \gamma^\ast \rightarrow \ell^+\ell^-$, with $\ell$ being electrons or muons. The results are based on the full set of data collected in 2011 in $pp$ collisions at the LHC at $\sqrt{s} = 7$ TeV, corresponding to an integrated luminosity of 4.8 $\text{fb}^{-1}$. The measured asymmetry values are found to be in agreement with the corresponding Standard Model predictions. The default routine will pick up the electron decay channel of the $Z$ boson. Individual channels can be specified directly with the plugins ATLAS_2014_I1312627_EL and ATLAS_2014_I1312627_MU, respectively. N.B. When running on multiple files, the asymmetry might have to be reconstructed in a post-processing step. To that end, the necessary Histo1D objects are written out as well. The asymmetry is a Scatter2D objects ending in y01 and is constructed from the Histo1D objects (ending in y02 and y03) in the following way: y01 = (y02 - y03) / (y02 + y03)

ATLAS_2015_I1351916_MU

$Z$ forward-backward asymmetry
Experiment: ATLAS (LHC)
Inspire ID: 1351916
Status: VALIDATED
Authors:
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Inclusive $Z$ in the muon channel

Measurements from the ATLAS experiment of the forward-backward asymmetry in the reaction $pp \rightarrow Z / \gamma^\ast \rightarrow \ell^+\ell^-$, with $\ell$ being electrons or muons. The results are based on the full set of data collected in 2011 in $pp$ collisions at the LHC at $\sqrt{s} = 7$ TeV, corresponding to an integrated luminosity of 4.8 $\text{fb}^{-1}$. The measured asymmetry values are found to be in agreement with the corresponding Standard Model predictions. The default routine will pick up the electron decay channel of the $Z$ boson. Individual channels can be specified directly with the plugins ATLAS_2014_I1312627_EL and ATLAS_2014_I1312627_MU, respectively. N.B. When running on multiple files, the asymmetry might have to be reconstructed in a post-processing step. To that end, the necessary Histo1D objects are written out as well. The asymmetry is a Scatter2D objects ending in y01 and is constructed from the Histo1D objects (ending in y02 and y03) in the following way: y01 = (y02 - y03) / (y02 + y03)

ATLAS_2015_I1364361

Total and differential Higgs cross sections at 8 TeV with ATLAS
Experiment: ATLAS (LHC)
Inspire ID: 1364361
Status: VALIDATED
Authors:
  • Michaela Queitsch-Maitland
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • pp Higgs production at 8 TeV, include all processes (ggH, VH, VBF, ttH), stable Higgs

WARNING --- this analysis requires stable higgs bosons --- Measurements of the total and differential cross sections of Higgs boson production are performed using 20.3 fb−1 of pp collisions produced by the Large Hadron Collider at a center-of-mass energy of 8 TeV and recorded by the ATLAS detector. Cross sections are obtained from measured Higgs to diphoton and ZZ* event yields, which are combined accounting for detector efficiencies, fiducial acceptances and branching fractions. Differential cross sections are reported as a function of Higgs boson transverse momentum, Higgs boson rapidity, number of jets in the event, and transverse momentum of the leading jet. The total production cross section is determined to be 33.0 ± 5.3 (stat) ± 1.6 (sys) pb.

ATLAS_2015_I1376945

Colour flow in hadronic top decay at 8 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1376945
Status: VALIDATED
Authors:
  • Ben Nachman
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • ttbar production with one W decaying leptonically, the other one hadronically

The distribution and orientation of energy inside jets is predicted to be an experimental handle on colour connections between the hard-scatter quarks and gluons initiating the jets. This is a measurement of the distribution of one such variable, the jet pull angle. The pull angle is measured for jets produced in $t\bar{t}$ events with one $W$ boson decaying leptonically and the other decaying to jets using 20.3\,$\text{fb}^{-1}$ of data recorded with the ATLAS detector at a centre-of-mass energy of $\sqrt{s} = 8$\,TeV at the LHC. The jet pull angle distribution is corrected for detector resolution and acceptance effects.

ATLAS_2015_I1387176

Energy-energy correlation
Experiment: ATLAS (LHC)
Inspire ID: 1387176
Status: VALIDATED
Authors:
  • Javier Llorente
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • inclusive jets

High transverse momentum jets produced in $pp$ collisions at a centre-of-mass energy of 7\,TeV are used to measure the transverse energy-energy correlation function and its associated azimuthal asymmetry. The data were recorded with the ATLAS detector at the LHC in the year 2011 and correspond to an integrated luminosity of $158\,\text{pb}^{−1}$. The selection criteria demand the average transverse momentum of the two leading jets in an event to be larger than 250\,GeV. The data are unfolded to the particle level. NB--If the routine is to be run on several samples (with different cross sections), the asymmetry has to be calculated again in a post-processing step using the merged output file.

ATLAS_2015_I1390114

$tt+b(b)$ at 8 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1390114
Status: VALIDATED
Authors:
  • Matthias Danninger
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • Top-antitop production

Fiducial cross-sections for $t\bar{t}$ production with one or two additional $b$-jets are presented, using an integrated luminosity of 20.3 fb${}^{-1}$ of proton-proton collisions at a centre-of-mass energy of 8 TeV at the Large Hadron Collider, collected with the ATLAS detector. The cross-section times branching ratio for $t\bar{t}$ events with at least one additional $b$-jet is measured to be 950 $\pm$ 70 (stat.) ${}^{+240}_{-190}$ (syst.) fb in the lepton-plus-jets channel and 50 $\pm$ 10 (stat.) ${}^{+15}_{-10}$ (syst.) fb in the $e\mu$ channel. The cross-section times branching ratio for events with at least two additional $b$-jets is measured to be 19.3 $\pm$ 3.5 (stat.) $\pm$ 5.7 (syst.) fb in the dilepton channel ($e\mu$, $\mu\mu$, $ee$) using a method based on tight selection criteria, and 13.5 $\pm$ 3.3 (stat.) $\pm$ 3.6 (syst.) fb using a looser selection that allows the background normalisation to be extracted from data. The latter method also measures a value of 1.30 $\pm$ 0.33 (stat.) $\pm$ 0.28 (syst.)$\%$ for the ratio of $t\bar{t}$ production with two additional $b$-jets to $t\bar{t}$ production with any two additional jets. NB: When merging several output YODA files, the ratio (d02-x01-y01) needs to be reconstructed in a post-processing step.

ATLAS_2015_I1393758

Jet charge
Experiment: ATLAS (LHC)
Inspire ID: 1393758
Status: VALIDATED
Authors:
  • Ben Nachman
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • dijet production

The momentum-weighted sum of the charges of tracks associated to a jet is sensitive to the charge of the initiating quark or gluon. This paper presents a measurement of the distribution of momentum-weighted sums, called jet charge, in dijet events using 20.3 fb${}^{-1}$ of data recorded with the ATLAS detector at $\sqrt{s} = 8$ TeV in $pp$ collisions at the LHC. The jet charge distribution is unfolded to remove distortions from detector effects and the resulting particle-level distribution is compared with several models. The $p_\text{T}$ dependence of the jet charge distribution average and standard deviation are compared to predictions obtained with several leading-order and next-to-leading-order parton distribution functions. The data are also compared to different Monte Carlo simulations of QCD dijet production using various settings of the free parameters within these models. The chosen value of the strong coupling constant used to calculate gluon radiation is found to have a significant impact on the predicted jet charge. There is evidence for a $p_\text{T}$ dependence of the jet charge distribution for a given jet flavor. In agreement with perturbative QCD predictions, the data show that the average jet charge of quark-initiated jets decreases in magnitude as the energy of the jet increases.

ATLAS_2015_I1394679

Multijets at 8 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1394679
Status: VALIDATED
Authors:
  • Sabrina Sacerdoti
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • p + p -> j j j j + X

Differential cross sections for the production of at least four jets have been measured in proton-proton collisions at $\sqrt{s}=8$\,TeV at the Large Hadron Collider using the ATLAS detector. The dataset corresponds to an integrated luminosity of 20.3\,fb^{−1}. The cross sections are corrected for detector effects and presented as a function of the jet momenta, invariant masses, minimum and maximum opening angles and other kinematic variables.

ATLAS_2015_I1394865

Inclusive 4-lepton lineshape
Experiment: ATLAS (LHC)
Inspire ID: 1394865
Status: VALIDATED
Authors:
  • Bing Li
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • $p p \to \ell \ell \ell \ell + X$

The four-lepton (4$\ell$, $\ell = e,\mu$) production cross section is measured in the mass range from 80 to 1000 GeV using 20.3 fb$^{-1}$ of data in $pp$ collisions at $\sqrt{s}=8$ TeV collected with the ATLAS detector at the LHC. The $4\ell$ events are produced in the decays of resonant $Z$ and Higgs bosons and the non-resonant $ZZ$ continuum originating from $q\bar{q}$, $gg$, $qg$ initial states. A total of 476 signal candidate events are observed with a background expectation of 26.2$\pm$3.6 events, enabling the measurement of the integrated cross section and the differential cross section as a function of the invariant mass and transverse momentum of the four-lepton system.

ATLAS_2015_I1397635

$Wt$ at 8 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1397635
Status: VALIDATED
Authors:
  • Reinhard Schwienhorst
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • Single top $Wt$ + top--antitop production

Fiducial cross-section for $Wt+t\bar{t}$ production in events with two leptons and exactly one jet, using an integrated luminosity of 20.3 fb${}^{-1}$ of proton-proton collisions at a centre-of-mass energy of 8 TeV at the Large Hadron Collider, collected with the ATLAS detector. The cross-section for the production of a top quark and a $W$ boson is measured in a fiducial acceptance requiring two leptons with $p_\perp > 25$ GeV and $|\eta| < 2.5$, one jet with $p_\perp > 20$ GeV and $|\eta| < 2.5$, and $E^\text{miss}_\text{T}  > 20$ GeV, including both $Wt$ and top-quark pair events as signal. The measured value of the fiducial cross-section is $0.85 \pm 0.01$ (stat.) $\pm 0.07$ (syst.) $\pm 0.03$ (lumi.) pb.

ATLAS_2015_I1397637

Boosted ttbar differential cross-section
Experiment: ATLAS (LHC)
Inspire ID: 1397637
Status: VALIDATED
Authors:
  • Lorenzo Massa
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • Top-antitop production

The differential cross-section for pair production of top quarks with high transverse momentum is measured in 20.3fb${}^{-1}$ of proton-proton collisions at a center-of-mass energy of 8 TeV. The measurement is performed for $t\bar{t}$ events in the lepton+jets channel. The cross-section is reported as a function of the hadronically decaying top quark transverse momentum for values above 300 GeV. The hadronically decaying top quark is reconstructed as an anti-$k_\text{t}$ jet with radius parameter $R=1.0$ and identified with jet substructure techniques. The observed yield is corrected for detector effects to obtain a cross-section at particle level in a fiducial region close to the event selection.

ATLAS_2015_I1404878

ttbar (to l+jets) differential cross sections at 8 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1404878
Status: VALIDATED
Authors:
  • Francesco La Ruffa
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • non-all-hadronic ttbar production at 8 TeV

Measurements of normalized differential cross-sections of top-quark pair production are presented as a function of the top-quark, $t\bar{t}$ system and event-level kinematic observables in proton-proton collisions at a centre-of-mass energy of $\sqrt{s} = 8$ TeV. The observables have been chosen to emphasize the $t\bar{t}$ production process and to be sensitive to effects of initial- and final-state radiation, to the different parton distribution functions, and to non-resonant processes and higher-order corrections. The dataset corresponds to an integrated luminosity of 20.3 fb${}^{-1}$, recorded in 2012 with the ATLAS detector at the CERN Large Hadron Collider. Events are selected in the lepton$+$jets channel, requiring exactly one charged lepton and at least four jets with at least two of the jets tagged as originating from a $b$-quark. The measured spectra are corrected for detector effects and are compared to several Monte Carlo simulations. The results are in fair agreement with the predictions over a wide kinematic range. Nevertheless, most generators predict a harder top-quark transverse momentum distribution at high values than what is observed in the data. Predictions beyond NLO accuracy improve the agreement with data at high top-quark transverse momenta. Using the current settings and parton distribution functions, the rapidity distributions are not well modelled by any generator under consideration. However, the level of agreement is improved when more recent sets of parton distribution functions are used.

ATLAS_2015_I1408516

$Z$ $p_T$ and $Z$ $\phi^*$
Experiment: ATLAS (LHC)
Inspire ID: 1408516
Status: VALIDATED
Authors:
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • inclusive Z production in the electron channel

Distributions of transverse momentum $p_\text{T}^{\ell\ell}$ and the angular variable $\phi^\ast_\eta$ of Drell-Yan lepton pairs are measured in $20.3\,\text{fb}^{-1}$ of proton-proton collisions at $\sqrt{s}=8$\,TeV with the ATLAS detector at the LHC. Measurements in electron-pair and muon-pair final states are corrected for detector effects. Compared to previous measurements in proto--proton collisions at i$\sqrt{s}=7$\,TeV, these new measurements benefit from a larger data sample and improved control of systematic uncertainties. Measurements are performed in bins of lepton-pair mass above, around and below the $Z$-boson mass peak. Specify the lepton channel (default is Z->ee) by using the dedicated plugins ATLAS_2015_I1408516_EL and ATLAS_2015_I1408516_MU.

ATLAS_2015_I1408516_EL

$Z$ $p_T$ and $Z$ $\phi^*$ in electron channel
Experiment: ATLAS (LHC)
Inspire ID: 1408516
Status: VALIDATED
Authors:
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • inclusive Z production in the electron channel

Distributions of transverse momentum $p_\text{T}^{\ell\ell}$ and the angular variable $\phi^\ast_\eta$ of Drell-Yan lepton pairs are measured in $20.3\,\text{fb}^{-1}$ of proton-proton collisions at $\sqrt{s}=8$\,TeV with the ATLAS detector at the LHC. Measurements in electron-pair and muon-pair final states are corrected for detector effects. Compared to previous measurements in proto--proton collisions at i$\sqrt{s}=7$\,TeV, these new measurements benefit from a larger data sample and improved control of systematic uncertainties. Measurements are performed in bins of lepton-pair mass above, around and below the $Z$-boson mass peak. Specify the lepton channel (default is Z->ee) by using the dedicated plugins ATLAS_2015_I1408516_EL and ATLAS_2015_I1408516_MU.

ATLAS_2015_I1408516_MU

$Z$ $p_T$ and $Z$ $\phi^*$ in muon channel
Experiment: ATLAS (LHC)
Inspire ID: 1408516
Status: VALIDATED
Authors:
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • inclusive Z production in the muon channel

Distributions of transverse momentum $p_\text{T}^{\ell\ell}$ and the angular variable $\phi^\ast_\eta$ of Drell-Yan lepton pairs are measured in $20.3\,\text{fb}^{-1}$ of proton-proton collisions at $\sqrt{s}=8$\,TeV with the ATLAS detector at the LHC. Measurements in electron-pair and muon-pair final states are corrected for detector effects. Compared to previous measurements in proto--proton collisions at i$\sqrt{s}=7$\,TeV, these new measurements benefit from a larger data sample and improved control of systematic uncertainties. Measurements are performed in bins of lepton-pair mass above, around and below the $Z$-boson mass peak. Specify the lepton channel (default is Z->ee) by using the dedicated plugins ATLAS_2015_I1408516_EL and ATLAS_2015_I1408516_MU.

ATLAS_2016_CONF_2016_037

Search for SUSY in events with 2 same-sign leptons or 3 leptons, at 13 \text{TeV}
Experiment: ATLAS (LHC)
Status: UNVALIDATED
Authors:
  • Andy Buckley
No references listed
Beams: p+ p+
Beam energies: (6500.0, 6500.0) GeV
Run details:
  • BSM signal events

A search for strongly produced supersymmetric particles using signatures involving multiple energetic jets and either two isolated same-sign leptons ($e$ or $\mu$) or at least three isolated leptons. The analysis also utilises other observables, such as $b$-tagged jets or missing transverse momentum, to extend its sensitivity. A data sample of proton--proton collisions at $\sqrt{s} = 13 \text{TeV}$ recorded with the ATLAS detector at the Large Hadron Collider in 2015 and 2016, corresponding to a total integrated luminosity of 13.2/fb, is used for the search. No significant excess over the Standard Model expectation is observed.

ATLAS_2016_CONF_2016_054

ATLAS 2016 1-lepton SUSY search at 13 \text{TeV}, from 14.8/fb CONF note
Experiment: ATLAS (LHC)
Status: UNVALIDATED
Authors:
  • Andy Buckley
No references listed
Beams: p+ p+
Beam energies: (6500.0, 6500.0) GeV
Run details:
  • BSM signal events

A search for squarks and gluinos in final states with an isolated electron or muon, multiple jets and large missing transverse momentum using proton--proton collision data at a centre-of-mass energy of $\sqrt{s} = 13 \text{TeV}$. The dataset corresponds to an integrated luminosity of 14.8/fb, recorded in 2015 and 2016 by the ATLAS experiment at the Large Hadron Collider.

ATLAS_2016_CONF_2016_078

ATLAS ICHEP16 0-lepton SUSY search at 13 \text{TeV} with 13.2/fb
Experiment: ATLAS (LHC)
Status: VALIDATED
Authors:
  • Andy Buckley
No references listed
Beams: p+ p+
Beam energies: (6500.0, 6500.0) GeV
Run details:
  • BSM signal events.

ATLAS search for SUSY in 13 TeV $pp$ collisions at LHC Run 2, using 13.2/fb of integrated luminosity and events containing missing transverse momentum and no isolated high-energy leptons.

ATLAS_2016_CONF_2016_092

Inclusive jet cross sections using early 13 TeV data
Experiment: ATLAS (LHC)
Inspire ID: 1482689
Status: VALIDATED
Authors:
  • Stefan von Buddenbrock
References:
  • ATLAS-CONF-2016-092
Beams: p+ p+
Beam energies: (6500.0, 6500.0) GeV
Run details:
  • Soft and hard QCD events

This note presents the measurement of inclusive-jet cross-sections in proton--proton collisions at a centre-of-mass energy of 13TeV. The measurement uses data corresponding to an integrated luminosity of 3.2 fb$^{-1}$ collected with the ATLAS detector at the Large Hadron Collider in 2015. Jets are clustered using the anti-$k_\text{t}$ algorithm with a radius parameter value of $R = 0.4$. Double differential inclusive-jet cross-sections are presented as a function of the jet transverse momentum, covering the range from 100 GeV to about 3.2 TeV, and of the absolute jet rapidity, up to $|y| = 3$. The predictions of next-to-leading-order QCD calculations using several parton distribution function (PDF) sets and corrected for non-perturbative and electroweak effects are compared to the measured cross-sections. The predictions are consistent with the measured cross-sections within uncertainties.

ATLAS_2016_CONF_2016_094

ATLAS 2016 1-lepton + many jets SUSY search at 13 \text{TeV}, from 14.8/fb CONF note
Experiment: ATLAS (LHC)
Status: UNVALIDATED
Authors:
  • Andy Buckley
No references listed
Beams: p+ p+
Beam energies: (6500.0, 6500.0) GeV
Run details:
  • BSM signal events

A search for new phenomena in final states characterized by high jet multiplicity, an isolated lepton (electron or muon), and either zero or at least three $b$-tagged jets is. The search uses 14.8/fb of $\sqrt{s} = 13 \text{TeV}$ proton--proton collision data collected by the ATLAS experiment at the Large Hadron Collider in 2015 and 2016.

ATLAS_2016_I1419070

Number of tracks in jets
Experiment: ATLAS (LHC)
Inspire ID: 1419070
Status: VALIDATED
Authors:
  • Ben Nachman
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • dijet production

The number of charged particles inside jets is a widely used discriminant for identifying the quark or gluon nature of the initiating parton and is sensitive to both the perturbative and non-perturbative components of fragmentation. This analysis presents a measurement of the average number of charged particles with $p_\text{T}>500$ MeV inside high-momentum jets in dijet events using 20.3 fb${}^{-1}$ of data recorded with the ATLAS detector in $pp$ collisions at $\sqrt{s}=8$ TeV collisions at the LHC. The jets considered have transverse momenta from 50 GeV up to and beyond 1.5 TeV. The reconstructed charged-particle track multiplicity distribution is unfolded to remove distortions from detector effects.

ATLAS_2016_I1419652

Track-based minimum bias at 13 TeV in ATLAS
Experiment: ATLAS (LHC)
Inspire ID: 1419652
Status: VALIDATED
Authors:
  • Roman Lysak
References: Beams: p+ p+
Beam energies: (6500.0, 6500.0) GeV
Run details:
  • $pp$ QCD interactions at 13 TeV. Diffractive events should be included. Multiple kinematic cuts should not be required.

Measurements from proton-proton collisions at centre-of-mass energy of $\sqrt{s} = 13$ TeV recorded with the ATLAS detector at the LHC. Events were collected using a single-arm minimum-bias trigger. The charged-particle multiplicity, its dependence on transverse momentum and pseudorapidity and the relationship between the mean transverse momentum and charged-particle multiplicity are measured. The observed distributions are corrected to well-defined phase-space regions ($p_\text{T} > 500$ MeV and $|\eta| < 2.5$ of the particles), using model-independent corrections.

ATLAS_2016_I1424838

Event shapes in leptonic $Z$-events
Experiment: ATLAS (LHC)
Inspire ID: 1424838
Status: VALIDATED
Authors:
  • Holger Schulz
No references listed
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • $Z \to \ell\ell$ with $p_\perp(\ell)>20$ GeV

Measurement of transverse event-shape observables ($N_\text{ch}$, $\sump_\perp$, thrust, beam-thrust, $F$-parameter, and spherocity) in $Z \to \ell\ell$ events at 7 TeV for different $p_\perp(Z)$ regions.

ATLAS_2016_I1426515

WW production at 8 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1426515
Status: VALIDATED
Authors:
  • Kristin Lohwasser
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • pp -> WW production at 8 TeV

The production of $W$ boson pairs in proton-proton collisions at $\sqrt{s} = 8$ TeV is studied using data corresponding to 20.3 fb${}^{-1}$ of integrated luminosity collected by the ATLAS detector during 2012 at the CERN Large Hadron Collider. The $W$ bosons are reconstructed using their leptonic decays into electrons or muons and neutrinos. Events with reconstructed jets are not included in the candidate event sample. A total of 6636 $WW$ candidate events are observed. Measurements are performed in fiducial regions closely approximating the detector acceptance. The integrated measurement is corrected for all acceptance effects and for the $W$ branching fractions to leptons in order to obtain the total $WW$ production cross section, which is found to be $71.1 \pm 1.1$ (stat) ${}^{+5.7}_{-5.0}$ (syst) $\pm 1.4$ (lumi) pb. This agrees with the next-to-next-to-leading-order Standard Model prediction of $63.2 {}^{+1.6}_{-1.4}$ (scale) $\pm 1.2$ (PDF) pb. Fiducial differential cross sections are measured as a function of each of six kinematic variables. The distribution of the transverse momentum of the leading lepton is used to set limits on anomalous triple-gauge-boson couplings.

ATLAS_2016_I1426695

Track-based minimum bias at 8 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1426695
Status: VALIDATED
Authors:
  • Roman Lysak
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • $pp$ QCD interactions at 8 TeV. Diffractive events should be included. Multiple kinematic cuts should not be required.

This paper presents measurements of distributions of charged particles which are produced in proton-proton collisions at a centre-of-mass energy of $\sqrt{s} = 8$ TeV and recorded by the ATLAS detector at the LHC. A special dataset recorded in 2012 with a small number of interactions per beam crossing (below 0.004) and corresponding to an integrated luminosity of 160 $\mu\text{b}^{-1}$ was used. A minimum-bias trigger was utilised to select a data sample of more than 9 million collision events. The multiplicity, pseudorapidity, and transverse momentum distributions of charged particles are shown in different regions of kinematics and charged-particle multiplicity, including measurements of final states at high multiplicity. The results are corrected for detector effects and are compared to the predictions of various Monte Carlo event generator models which simulate the full hadronic final state.

ATLAS_2016_I1444991

Higgs-to-WW differential cross sections at 8 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1444991
Status: VALIDATED
Authors:
  • Kathrin Becker
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • gg -> H -> W W* -> enu munu production at 8 TeV

This paper describes a measurement of fiducial and differential cross sections of gluon-fusion Higgs boson production in the $H\rightarrow W W^\ast \rightarrow e\nu\mu\nu$ channel, using 20.3 fb$^{-1}$ of proton-proton collision data. The data were produced at a centre-of-mass energy of $\sqrt{s} = 8$ TeV at the CERN Large Hadron Collider and recorded by the ATLAS detector in 2012. Cross sections are measured from the observed $H\rightarrow W W^\ast \rightarrow e\nu\mu\nu$ signal yield in categories distinguished by the number of associated jets. The total cross section is measured in a fiducial region defined by the kinematic properties of the charged leptons and neutrinos. Differential cross sections are reported as a function of the number of jets, the Higgs boson transverse momentum, the dilepton rapidity, and the transverse momentum of the leading jet. The jet-veto efficiency, or fraction of events with no jets above a given transverse momentum threshold, is also reported. All measurements are compared to QCD predictions from Monte Carlo generators and fixed-order calculations, and are in agreement with the Standard Model predictions.

ATLAS_2016_I1448301

Zg(g) cross sections at 8 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1448301
Status: VALIDATED
Authors:
  • Hulin Wang
  • Evgeny Soldatov
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • p + p -> e+ e- gamma (gamma) at 8 TeV

The production of $Z$ bosons with one or two isolated high-energy photons is studied using pp collisions at $\sqrt{s}=8$ TeV. The analyses use a data sample with an integrated luminosity of 20.3 fb${}^{-1}$ collected by the ATLAS detector during the 2012 LHC data taking. The $Z\gamma$ and $Z\gamma\gamma$ production cross sections are measured with leptonic ($e^+e^-$, $\mu^+\mu^-$, $\nu\bar{\nu}$) decays of the Z boson, in extended fiducial regions defined in terms of the lepton and photon acceptance. They are then compared to cross-section predictions from the Standard Model, where the sources of the photons are radiation off initial-state quarks and radiative Z-boson decay to charged leptons, and from fragmentation of final-state quarks and gluons into photons. The yields of events with photon transverse energy $E_\text{T}>250$ GeV from $\ell^+\ell^-\gamma$ events and with $E_\text{T}>400$ GeV from $\nu\bar{\nu}\gamma$ events are used to search for anomalous triple gauge-boson couplings $ZZ\gamma$ and $Z\gamma\gamma$. The yields of events with diphoton invariant mass $m_{\gamma\gamma}>200$ GeV from $\ell^+\ell^-\gamma\gamma$ events and with $m_{\gamma\gamma}>300$ GeV from $\nu\bar{\nu}\gamma\gamma$ events are used to search for anomalous quartic gauge-boson couplings $ZZ\gamma\gamma$ and $Z\gamma\gamma\gamma$. No deviations from Standard Model predictions are observed and limits are placed on parameters used to describe anomalous triple and quartic gauge-boson couplings. The lepton channel can be specified by using the relevant plugins (_EL, _MU, _NU). The default plugin uses the electron channel.

ATLAS_2016_I1448301_EL

Zg(g) cross sections at 8 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1448301
Status: VALIDATED
Authors:
  • Hulin Wang
  • Evgeny Soldatov
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • p + p -> e+ e- gamma (gamma) at 8 TeV

The production of $Z$ bosons with one or two isolated high-energy photons is studied using pp collisions at $\sqrt{s}=8$ TeV. The analyses use a data sample with an integrated luminosity of 20.3 fb${}^{-1}$ collected by the ATLAS detector during the 2012 LHC data taking. The $Z\gamma$ and $Z\gamma\gamma$ production cross sections are measured with leptonic ($e^+e^-$, $\mu^+\mu^-$, $\nu\bar{\nu}$) decays of the Z boson, in extended fiducial regions defined in terms of the lepton and photon acceptance. They are then compared to cross-section predictions from the Standard Model, where the sources of the photons are radiation off initial-state quarks and radiative Z-boson decay to charged leptons, and from fragmentation of final-state quarks and gluons into photons. The yields of events with photon transverse energy $E_\text{T}>250$ GeV from $\ell^+\ell^-\gamma$ events and with $E_\text{T}>400$ GeV from $\nu\bar{\nu}\gamma$ events are used to search for anomalous triple gauge-boson couplings $ZZ\gamma$ and $Z\gamma\gamma$. The yields of events with diphoton invariant mass $m_{\gamma\gamma}>200$ GeV from $\ell^+\ell^-\gamma\gamma$ events and with $m_{\gamma\gamma}>300$ GeV from $\nu\bar{\nu}\gamma\gamma$ events are used to search for anomalous quartic gauge-boson couplings $ZZ\gamma\gamma$ and $Z\gamma\gamma\gamma$. No deviations from Standard Model predictions are observed and limits are placed on parameters used to describe anomalous triple and quartic gauge-boson couplings. The lepton channel can be specified by using the relevant plugins (_EL, _MU, _NU). The default plugin uses the electron channel.

ATLAS_2016_I1448301_MU

Zg(g) cross sections at 8 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1448301
Status: VALIDATED
Authors:
  • Hulin Wang
  • Evgeny Soldatov
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • p + p -> mu+ mu- gamma (gamma) at 8 TeV

The production of $Z$ bosons with one or two isolated high-energy photons is studied using pp collisions at $\sqrt{s}=8$ TeV. The analyses use a data sample with an integrated luminosity of 20.3 fb${}^{-1}$ collected by the ATLAS detector during the 2012 LHC data taking. The $Z\gamma$ and $Z\gamma\gamma$ production cross sections are measured with leptonic ($e^+e^-$, $\mu^+\mu^-$, $\nu\bar{\nu}$) decays of the Z boson, in extended fiducial regions defined in terms of the lepton and photon acceptance. They are then compared to cross-section predictions from the Standard Model, where the sources of the photons are radiation off initial-state quarks and radiative Z-boson decay to charged leptons, and from fragmentation of final-state quarks and gluons into photons. The yields of events with photon transverse energy $E_\text{T}>250$ GeV from $\ell^+\ell^-\gamma$ events and with $E_\text{T}>400$ GeV from $\nu\bar{\nu}\gamma$ events are used to search for anomalous triple gauge-boson couplings $ZZ\gamma$ and $Z\gamma\gamma$. The yields of events with diphoton invariant mass $m_{\gamma\gamma}>200$ GeV from $\ell^+\ell^-\gamma\gamma$ events and with $m_{\gamma\gamma}>300$ GeV from $\nu\bar{\nu}\gamma\gamma$ events are used to search for anomalous quartic gauge-boson couplings $ZZ\gamma\gamma$ and $Z\gamma\gamma\gamma$. No deviations from Standard Model predictions are observed and limits are placed on parameters used to describe anomalous triple and quartic gauge-boson couplings. The lepton channel can be specified by using the relevant plugins (_EL, _MU, _NU). The default plugin uses the electron channel.

ATLAS_2016_I1448301_NU

Zg(g) cross sections at 8 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1448301
Status: VALIDATED
Authors:
  • Hulin Wang
  • Evgeny Soldatov
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • p + p -> MET gamma (gamma) at 8 TeV

The production of $Z$ bosons with one or two isolated high-energy photons is studied using pp collisions at $\sqrt{s}=8$ TeV. The analyses use a data sample with an integrated luminosity of 20.3 fb${}^{-1}$ collected by the ATLAS detector during the 2012 LHC data taking. The $Z\gamma$ and $Z\gamma\gamma$ production cross sections are measured with leptonic ($e^+e^-$, $\mu^+\mu^-$, $\nu\bar{\nu}$) decays of the Z boson, in extended fiducial regions defined in terms of the lepton and photon acceptance. They are then compared to cross-section predictions from the Standard Model, where the sources of the photons are radiation off initial-state quarks and radiative Z-boson decay to charged leptons, and from fragmentation of final-state quarks and gluons into photons. The yields of events with photon transverse energy $E_\text{T}>250$ GeV from $\ell^+\ell^-\gamma$ events and with $E_\text{T}>400$ GeV from $\nu\bar{\nu}\gamma$ events are used to search for anomalous triple gauge-boson couplings $ZZ\gamma$ and $Z\gamma\gamma$. The yields of events with diphoton invariant mass $m_{\gamma\gamma}>200$ GeV from $\ell^+\ell^-\gamma\gamma$ events and with $m_{\gamma\gamma}>300$ GeV from $\nu\bar{\nu}\gamma\gamma$ events are used to search for anomalous quartic gauge-boson couplings $ZZ\gamma\gamma$ and $Z\gamma\gamma\gamma$. No deviations from Standard Model predictions are observed and limits are placed on parameters used to describe anomalous triple and quartic gauge-boson couplings. The lepton channel can be specified by using the relevant plugins (_EL, _MU, _NU). The default plugin uses the electron channel.

ATLAS_2016_I1449082

Charge asymmetry in top quark pair production in dilepton channel
Experiment: ATLAS (LHC)
Inspire ID: 1449082
Status: VALIDATED
Authors:
  • Roman Lysak
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • pp --> top + antitop events at 8 TeV

Measurements of the top-antitop quark pair production charge asymmetry in the dilepton channel are presented using data corresponding to an integrated luminosity of $20.3\;\text{fb}^{-1}$ from $pp$ collisions at a center-of-mass energy of $\sqrt{s} = 8$ TeV collected with the ATLAS detector at the Large Hadron Collider at CERN. Inclusive and differential measurements as a function of the invariant mass, transverse momentum, and longitudinal boost of the $t\bar{t}$ system are performed both in the full phase space and in a fiducial phase space closely matching the detector acceptance (at least 2 leptons and 2 jets with $p_\text{T} > 25$ GeV and $|\eta| < 2.5$). Two observables are studied: $A_C^{\ell\ell}$ based on the selected leptons and $A_C^{t\bar{t}}$ based on the reconstructed $t\bar{t}$ final state. The unfolded distributions of $\Delta|\eta| = |\eta|_{\ell^+} - |\eta|_{\ell^-}$ and $\Delta|y| = |y|_\text{top} - |y|_\text{antitop}$ are provided. USERS SHOULD NOTE THAT EXPLICIT RECONSTRUCTION OF INDIVIDUAL STANDARD MODEL NEUTRINOS IS USED IN THIS ANALYSIS ROUTINE TO MATCH THE MONTE-CARLO-BASED CORRECTION TO THE FIDUCIAL REGION APPLIED IN THE PAPER.

ATLAS_2016_I1452559

Monojet + missing energy search with 3.2/fb of 13 TeV $pp$ data
Experiment: ATLAS (LHC)
Inspire ID: 1452559
Status: UNVALIDATED
Authors:
  • Andy Buckley
  • Shehu AbdusSalam
References:
  • Phys.Rev. D94 (2016) no.3, 032005
  • DOI: 10.1103/PhysRevD.94.032005
  • CERN-EP-2016-075
  • arXiv: 1604.07773
Beams: p+ p+
Beam energies: (6500.0, 6500.0) GeV
Run details:
  • BSM signal events

A search for new phenomena in final states with an energetic jet and large missing transverse momentum. The search uses proton-proton collision data corresponding to an integrated luminosity of 3.2/fb of $pp$ collisions at 13\;\text{TeV}, collected in 2015 with the ATLAS detector. Events are required to have at least one jet with a transverse momentum above 250 GeV and no leptons. Several signal regions are considered with increasing missing-transverse-momentum requirements between $E_T^\mathrm{miss} > 250\;\text{GeV}$ and 700\;\text{GeV}. Good agreement is observed between the number of events in data and Standard Model predictions.

ATLAS_2016_I1457605

Inclusive prompt photons at 8 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1457605
Status: VALIDATED
Authors:
  • Mark Stockton
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • Inclusive prompt photon production

A measurement of the cross section for the inclusive production of isolated prompt photons in proton-proton collisions at a centre-of-mass energy of $\sqrt{s} = 8$ TeV is presented. The measurement covers the pseudorapidity ranges $|\eta^\gamma| < 1.37$ $1.56 < |\eta^\gamma| < 2.37$ in the transverse energy range $25 < E^\gamma_\text{T} < 1500$ GeV. The results are based on an integrated luminosity of 20.2 fb${}^{-1}$, recorded by the ATLAS detector at the LHC. Photon candidates are identified by combining information from the calorimeters and the inner tracker. The background is subtracted using a data-driven technique, based on the observed calorimeter shower-shape variables and the deposition of hadronic energy in a narrow cone around the photon candidate.

ATLAS_2016_I1458270

0-lepton SUSY search with 3.2/fb of 13 TeV $pp$ data
Experiment: ATLAS (LHC)
Inspire ID: 1458270
Status: VALIDATED
Authors:
  • Andy Buckley
References:
  • Eur.Phys.J. C76 (2016) no.7, 392
  • DOI:10.1140/epjc/s10052-016-4184-8
  • arXiv: 1605.03814
Beams: p+ p+
Beam energies: (6500.0, 6500.0) GeV
Run details:
  • BSM signal events

ATLAS 0-lepton SUSY search using 3.2/fb of LHC $pp$ data at 13\;\text{TeV}, recorded in 2015. The event selection is via signal regions requiring from 2-6 high-energy jets, and significant missing transverse energy.

ATLAS_2016_I1467230

Track-based minimum bias with low-pT tracks at 13 TeV
Experiment: ATLAS (LHC)
Spires ID: 1467230
Status: VALIDATED
Authors:
  • Roman Lysak
References: Beams: p+ p+
Beam energies: (6500.0, 6500.0) GeV
Run details:
  • $pp$ QCD interactions at 13 TeV. Diffractive events should be included. Multiple kinematic cuts should not be required.

Measurements of distributions of charged particles produced in proton-proton collisions with a centre-of-mass energy of 13 TeV are presented. The data were recorded by the ATLAS detector at the LHC and correspond to an integrated luminosity of 151 $\mu$b$^{-1}$. The particles are required to have a transverse momentum greater than 100 MeV and an absolute pseudorapidity less than 2.5. The charged-particle multiplicity, its dependence on transverse momentum and pseudorapidity and the dependence of the mean transverse momentum on multiplicity are measured in events containing at least two charged particles satisfying the above kinematic criteria. The results are corrected for detector effects and compared to the predictions from several Monte Carlo event generators.

ATLAS_2016_I1467454

High-mass Drell-Yan at 8 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1467454
Status: VALIDATED
Authors:
  • Markus Zinser
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • Drell-Yan production in $pp$ collisons at 8 TeV, leptonic $Z$ decays

This paper presents a measurement of the double-differential cross section for the Drell-Yan $Z/\gamma^\ast \rightarrow \ell^+\ell^-$ and photon-induced $\gamma\gamma \rightarrow \ell^+\ell^-$ processes where $\ell$ is an electron or muon. The measurement is performed for invariant masses of the lepton pairs, $m_{\ell\ell}$, between 116 GeV and 1500 GeV using a sample of 20.3 fb$^{-1}$ of pp collisions data at centre-of-mass energy of $\sqrt{s} = 8$ TeV collected by the ATLAS detector at the LHC in 2012. The data are presented double differentially in invariant mass and absolute dilepton rapidity as well as in invariant mass and absolute pseudorapidity separation of the lepton pair. The single-differential cross section as a function of $m_{\ell\ell}$ is also reported. The electron and muon channel measurements are combined and a total experimental precision of better than 1\% is achieved at low $m_{\ell\ell}$. A comparison to next-to-next-to-leading order perturbative QCD predictions using several recent parton distribution functions and including next-to-leading order electroweak effects indicates the potential of the data to constrain parton distribution functions. In particular, a large impact of the data on the photon PDF is demonstrated.

ATLAS_2016_I1467454_EL

High-mass Drell-Yan at 8 TeV, electron channel
Experiment: ATLAS (LHC)
Inspire ID: 1467454
Status: VALIDATED
Authors:
  • Markus Zinser
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • Drell-Yan production in $pp$ collisons at 8 TeV, $Z$ decaying to muons

This paper presents a measurement of the double-differential cross section for the Drell-Yan $Z/\gamma^\ast \rightarrow \ell^+\ell^-$ and photon-induced $\gamma\gamma \rightarrow \ell^+\ell^-$ processes where $\ell$ is an electron or muon. The measurement is performed for invariant masses of the lepton pairs, $m_{\ell\ell}$, between 116 GeV and 1500 GeV using a sample of 20.3 fb$^{-1}$ of pp collisions data at centre-of-mass energy of $\sqrt{s} = 8$ TeV collected by the ATLAS detector at the LHC in 2012. The data are presented double differentially in invariant mass and absolute dilepton rapidity as well as in invariant mass and absolute pseudorapidity separation of the lepton pair. The single-differential cross section as a function of $m_{\ell\ell}$ is also reported. The electron and muon channel measurements are combined and a total experimental precision of better than 1\% is achieved at low $m_{\ell\ell}$. A comparison to next-to-next-to-leading order perturbative QCD predictions using several recent parton distribution functions and including next-to-leading order electroweak effects indicates the potential of the data to constrain parton distribution functions. In particular, a large impact of the data on the photon PDF is demonstrated.

ATLAS_2016_I1467454_MU

High-mass Drell-Yan at 8 TeV, muon channel
Experiment: ATLAS (LHC)
Inspire ID: 1467454
Status: VALIDATED
Authors:
  • Markus Zinser
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • Drell-Yan production in $pp$ collisons at 8 TeV, $Z$ decaying to muons

This paper presents a measurement of the double-differential cross section for the Drell-Yan $Z/\gamma^\ast \rightarrow \ell^+\ell^-$ and photon-induced $\gamma\gamma \rightarrow \ell^+\ell^-$ processes where $\ell$ is an electron or muon. The measurement is performed for invariant masses of the lepton pairs, $m_{\ell\ell}$, between 116 GeV and 1500 GeV using a sample of 20.3 fb$^{-1}$ of pp collisions data at centre-of-mass energy of $\sqrt{s} = 8$ TeV collected by the ATLAS detector at the LHC in 2012. The data are presented double differentially in invariant mass and absolute dilepton rapidity as well as in invariant mass and absolute pseudorapidity separation of the lepton pair. The single-differential cross section as a function of $m_{\ell\ell}$ is also reported. The electron and muon channel measurements are combined and a total experimental precision of better than 1\% is achieved at low $m_{\ell\ell}$. A comparison to next-to-next-to-leading order perturbative QCD predictions using several recent parton distribution functions and including next-to-leading order electroweak effects indicates the potential of the data to constrain parton distribution functions. In particular, a large impact of the data on the photon PDF is demonstrated.

ATLAS_2016_I1468167

Measurement of the inelastic proton--proton cross-section at $\sqrt{s} = 13\,\text{TeV}$
Experiment: ATLAS (LHC)
Inspire ID: 1468167
Status: VALIDATED
Authors:
  • Zachary Marshall
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (6500.0, 6500.0) GeV
Run details:
  • Inelastic events (non-diffractive and inelastic diffractive).

Inelastic cross-section is measured for $\xi > 1 \times 10^{-6}$, where $\xi=M_X^2/s$ is calculated from the invariant mass, $M_X$, of hadrons selected using the largest rapidity gap in the event.

ATLAS_2016_I1468168

Dileptonic $e \mu$ $t\bar{t}$ early cross-section measurement at 13 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1468168
Status: VALIDATED
Authors:
  • Tom Neep
  • Barbara Alvarez Gonzalez
  • Yang Qin
References: Beams: p+ p+
Beam energies: (6500.0, 6500.0) GeV
Run details:
  • $t\bar{t}$ production

This paper describes a measurement of the inclusive top quark pair production cross-section ($\sigma_{t\bar{t}}$) with a data sample of 3.2 fb${}^{-1}$ of proton-proton collisions at a centre-of-mass energy of $\sqrt{s}=13$ TeV, collected in 2015 by the ATLAS detector at the LHC. This measurement uses events with an opposite-charge electron-muon pair in the final state. Jets containing $b$-quarks are tagged using an algorithm based on track impact parameters and reconstructed secondary vertices. The numbers of events with exactly one and exactly two $b$-tagged jets are counted and used to determine simultaneously $\sigma_{t\bar{t}}$ and the efficiency to reconstruct and $b$-tag a jet from a top quark decay, thereby minimising the associated systematic uncertainties. The cross-section is measured to be: $\sigma_{t\bar{t}} = 818 \pm 8$ (stat) $\pm 27$ (syst) $\pm 19$ (lumi) $\pm 12$ (beam) pb, where the four uncertainties arise from data statistics, experimental and theoretical systematic effects, the integrated luminosity and the LHC beam energy, giving a total relative uncertainty of 4.4\%. The result is consistent with theoretical QCD calculations at next-to-next-to-leading order. A fiducial measurement corresponding to the experimental acceptance of the leptons is also presented.

ATLAS_2016_I1479760

Hard double-parton scattering in four-jet events at 7 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1479760
Status: VALIDATED
Authors:
  • Orel Gueta
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Four-jet events at 7 TeV

Inclusive four-jet events produced in $pp$ collisions at a centre-of-mass energy of $\sqrt{s} = 7$ TeV have been analysed for the presence of hard double-parton scattering using data corresponding to an integrated luminosity of $(37.3 \pm 1.3)$ $\mathrm{pb}^{-1}$, collected with the ATLAS detector at the LHC. The distributions of observables sensitive to the contribution of hard double-parton scattering are provided for events containing at least four jets with $p_{\mathrm{T}} \geq 20$ GeV and $\eta \leq 4.4$, and at least one of which has $p_{\text{T}} \geq 42.5$ GeV.

ATLAS_2016_I1492320_2l2j

WWW production at 8 TeV, 2L2J mode
Experiment: ATLAS (LHC)
Inspire ID: 1492320
Status: VALIDATED
Authors:
  • Alex Long
  • Ismet Siral
  • Louis Helary
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • pp -> WWW production at 8 TeV

This paper reports a search for triboson $W^\pm W^\pm W^\mp$ production in two decay channels ($W^\pm W^\pm W^\mp \to \ell^\pm\nu \ell^\pm\nu \ell^\mp\nu$) and ($W^\pm W^\pm W^\mp \to \ell^\pm\nu \ell^\pm\nu jj$ with $\ell = e,\mu$) in proton-proton collision data corresponding to an integrated luminosity of 20.3 fb${}^{-1}$ at a centre-of-mass energy of 8 TeV with the ATLAS detector at the Large Hadron Collider. Events with exactly three charged leptons, or two leptons with the same electric charge in association with two jets, are selected. The total number of events observed in data is consistent with the Standard Model (SM) predictions. The observed 95 % confidence level upper limit on the SM $W^\pm W^\pm W^\mp$ production cross section is found to be 730 fb with an expected limit of 560 fb in the absence of SM $W^\pm W^\pm W^\mp$ production. Limits are also set on $WWWW$ anomalous quartic gauge couplings.

ATLAS_2016_I1492320_3l

WWW production at 8 TeV, 3L mode
Experiment: ATLAS (LHC)
Inspire ID: 1492320
Status: VALIDATED
Authors:
  • Alex Long
  • Ismet Siral
  • Louis Helary
  • Christian Gutschow
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • pp -> WWW production at 8 TeV

This paper reports a search for triboson $W^\pm W^\pm W^\mp$ production in two decay channels ($W^\pm W^\pm W^\mp \to \ell^\pm\nu \ell^\pm\nu \ell^\mp\nu$) and ($W^\pm W^\pm W^\mp \to \ell^\pm\nu \ell^\pm\nu jj$ with $\ell = e,\mu$) in proton-proton collision data corresponding to an integrated luminosity of 20.3 fb${}^{-1}$ at a centre-of-mass energy of 8 TeV with the ATLAS detector at the Large Hadron Collider. Events with exactly three charged leptons, or two leptons with the same electric charge in association with two jets, are selected. The total number of events observed in data is consistent with the Standard Model (SM) predictions. The observed 95 % confidence level upper limit on the SM $W^\pm W^\pm W^\mp$ production cross section is found to be 730 fb with an expected limit of 560 fb in the absence of SM $W^\pm W^\pm W^\mp$ production. Limits are also set on $WWWW$ anomalous quartic gauge couplings.

ATLAS_2017_I1509919

Track-based underlying event at 13 TeV in ATLAS
Experiment: ATLAS (LHC)
Inspire ID: 1509919
Status: VALIDATED
Authors:
  • Roman Lysak
References: Beams: p+ p+
Beam energies: (6500.0, 6500.0) GeV
Run details:
  • $pp$ QCD interactions at 13 TeV. Diffractive events should be included.

We present charged-particle distributions sensitive to the underlying event, measured by the ATLAS detector in proton-proton collisions at a centre-of-mass energy of 13 TeV, in low-luminosity Large Hadron Collider fills corresponding to an integrated luminosity of 1.6 nb${}^{-1}$. The distributions were constructed using charged particles with absolute pseudorapidity less than 2.5 and with transverse momentum greater than 500 MeV, in events with at least one such charged particle with transverse momentum above 1 GeV. These distributions characterise the angular distribution of energy and particle flows with respect to the charged particle with highest transverse momentum, as a function of both that momentum and of charged-particle multiplicity. The results have been corrected for detector effects and are compared to the predictions of various Monte Carlo event generators, experimentally establishing the level of underlying-event activity at LHC Run 2 energies and providing inputs for the development of event generator modelling. The current models in use for UE modelling typically describe this data to 5% accuracy, compared with data uncertainties of less than 1%.

ATLAS_2017_I1514251

Z plus jets at 13 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1514251
Status: VALIDATED
Authors:
  • Gavin Hesketh
References: Beams: p+ p+
Beam energies: (6500.0, 6500.0) GeV
Run details:
  • pp -> Z(->ll) + jets at 13 TeV

Measurements of the production cross section of a $Z$ boson in association with jets in proton-proton collisions at i $\sqrt{s}=13$ TeV are presented, using data corresponding to an integrated luminosity of 3.16 fb${}^{-1}$ collected by the ATLAS experiment at the CERN Large Hadron Collider in 2015. Inclusive and differential cross sections are measured for events containing a $Z$ boson decaying to electrons or muons and produced in association with up to seven jets with $p_\text{T}>30$ GeV and $|y|<2.5$. Predictions from different Monte Carlo generators based on leading-order and next-to-leading-order matrix elements for up to two additional partons interfaced with parton shower and fixed-order predictions at next-to-leading order and next-to-next-to-leading order are compared with the measured cross sections. Good agreement within the uncertainties is observed for most of the modelled quantities, in particular with the generators which use next-to-leading-order matrix elements and the more recent next-to-next-to-leading-order fixed-order predictions.

ATLAS_2017_I1514251_EL

Z plus jets at 13 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1514251
Status: VALIDATED
Authors:
  • Gavin Hesketh
References: Beams: p+ p+
Beam energies: (6500.0, 6500.0) GeV
Run details:
  • pp -> Z(->ee) + jets at 13 TeV

Measurements of the production cross section of a $Z$ boson in association with jets in proton-proton collisions at i $\sqrt{s}=13$ TeV are presented, using data corresponding to an integrated luminosity of 3.16 fb${}^{-1}$ collected by the ATLAS experiment at the CERN Large Hadron Collider in 2015. Inclusive and differential cross sections are measured for events containing a $Z$ boson decaying to electrons or muons and produced in association with up to seven jets with $p_\text{T}>30$ GeV and $|y|<2.5$. Predictions from different Monte Carlo generators based on leading-order and next-to-leading-order matrix elements for up to two additional partons interfaced with parton shower and fixed-order predictions at next-to-leading order and next-to-next-to-leading order are compared with the measured cross sections. Good agreement within the uncertainties is observed for most of the modelled quantities, in particular with the generators which use next-to-leading-order matrix elements and the more recent next-to-next-to-leading-order fixed-order predictions.

ATLAS_2017_I1514251_MU

Z plus jets at 13 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1514251
Status: VALIDATED
Authors:
  • Gavin Hesketh
References: Beams: p+ p+
Beam energies: (6500.0, 6500.0) GeV
Run details:
  • pp -> Z(->mumu) + jets at 13 TeV

Measurements of the production cross section of a $Z$ boson in association with jets in proton-proton collisions at i $\sqrt{s}=13$ TeV are presented, using data corresponding to an integrated luminosity of 3.16 fb${}^{-1}$ collected by the ATLAS experiment at the CERN Large Hadron Collider in 2015. Inclusive and differential cross sections are measured for events containing a $Z$ boson decaying to electrons or muons and produced in association with up to seven jets with $p_\text{T}>30$ GeV and $|y|<2.5$. Predictions from different Monte Carlo generators based on leading-order and next-to-leading-order matrix elements for up to two additional partons interfaced with parton shower and fixed-order predictions at next-to-leading order and next-to-next-to-leading order are compared with the measured cross sections. Good agreement within the uncertainties is observed for most of the modelled quantities, in particular with the generators which use next-to-leading-order matrix elements and the more recent next-to-next-to-leading-order fixed-order predictions.

ATLAS_2017_I1589844

$k_T$ splittings in $Z$ events at 8 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1589844
Status: VALIDATED
Authors:
  • Christian Gutschow
  • Frank Siegert
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • $pp \to Z(\to ee/\mu\mu) +$ jets at 8 TeV

A measurement of the splitting scales occuring in the $k_\text{t}$ jet-clustering algorithm is presented for final states containing a $Z$ boson. The measurement is done using 20.2 fb$^{-1}$ of proton-proton collision data collected at a centre-of-mass energy of $\sqrt{s} = 8$ TeV by the ATLAS experiment at the LHC in 2012. The measurement is based on charged-particle track information, which is measured with excellent precision in the $p_\text{T}$ region relevant for the transition between the perturbative and the non-perturbative regimes. The data distributions are corrected for detector effects, and are found to deviate from state-of-the-art predictions in various regions of the observables.

ATLAS_2017_I1589844_EL


Experiment: ()
Status: UNVALIDATED
No authors listed No references listed
Beams: * *
Beam energies: ANY
    No run details listed

ATLAS_2017_I1589844_MU


Experiment: ()
Status: UNVALIDATED
No authors listed No references listed
Beams: * *
Beam energies: ANY
    No run details listed

ATLAS_2017_I1591327

Inclusive diphoton cross-sections at 8 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1591327
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • $pp \to \gamma \gamma$ at 8 TeV

A measurement of the production cross section for two isolated photons in proton--proton collisions at a center-of-mass energy of $\sqrt{s}=8$ TeV is presented. The results are based on an integrated luminosity of 20.2 fb$^{-1}$ recorded by the ATLAS detector at the Large Hadron Collider. The measurement considers photons with pseudorapidities satisfying $|\eta^\gamma| < 1.37$ or $1.56 < |\eta^\gamma| < 2.37$ and transverse energies of respectively $E^\gamma_\text{T,1}>40$ GeV and $E^\gamma_\text{T,2}> 30$ GeV for the two leading photons ordered in transverse energy produced in the interaction. The background due to hadronic jets and electrons is subtracted using data-driven techniques. The fiducial cross sections are corrected for detector effects and measured differentially as a function of six kinematic observables. The measured cross section integrated within the fiducial volume is $16.8\pm0.8$ pb. The data are compared to fixed-order QCD calculations at next-to-leading-order and next-to-next-to-leading-order accuracy as well as next-to-leading-order computations including resummation of initial-state gluon radiation at next-to-next-to-leading logarithm or matched to a parton shower, with relative uncertainties varying from 5% to 20%.

BABAR_2003_I593379

Measurement of inclusive charmonium production
Experiment: BaBar (PEP-II)
Inspire ID: 593379
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Phys.Rev. D67 032002, 2003
  • hep-ex/0207097
Beams: e+ e-
Beam energies: (3.5, 8.0) GeV
Run details:
  • Production of charmionum at the $\Upsilon(4S)$ resonace.

Measurement of $J/\psi$, $\psi'$, $\chi_{c1}$ and $\chi_{c2}$ production using a data sample corresponding to an integrated luminosity of 20.3\;fb$^{-1}$ collected with the BABAR detector at the SLAC PEP-II electron-positron storage ring operating at a centre-of-mass energy near 10.58\;GeV.

BABAR_2005_S6181155

Production and decay of $\Xi^0_c$ at BABAR.
Experiment: BaBar (PEP-II)
Inspire ID: 679961
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Phys.Rev.Lett. 95 (2005) 142003
  • hep-ex/0504014
Beams: e+ e-
Beam energies: (3.5, 8.0); (3.5, 7.9) GeV
Run details:
  • $e^+ e^-$ analysis on the $\Upsilon(4S)$ resonance, with CoM boosts of 8.0 GeV ($e^-$) and 3.5 GeV ($e^+$)

Analysis of $\Xi_c^0$ production in B decays and from the $c\bar{c}$ continuum, with the $\Xi_c^0$ decaying into $\Omega^- K^+$ and $\Xi^- \pi^+$ final states measured using 116.1 $\text{fb}^{-1}$ of data collected by the BABAR detector. The normalisation of the data as been modifed from that presented in the original paper in order to produce a differential cross section rather than the cross section in each bin. In addition to the data presented in the paper plots are alos made with unit normalisation which can be more useful for Monte Carlo tuning.

BABAR_2007_S6895344

Inclusive $\Lambda_c^+$ Production in $e^+e^-$ Annihilation at $\sqrt{s}=10.54$ GeV and in $\Upsilon(4S)$ Decays.
Experiment: BaBar (PEP-II)
Inspire ID: 725377
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Phys.Rev. D75 (2007) 012003
  • hep-ex/0609004
Beams: e+ e-
Beam energies: (3.5, 8.0); (3.5, 7.9) GeV
Run details:
  • $e^+ e^-$ analysis on the $\Upsilon(4S)$ resonance, with CoM boosts of 8.0 GeV ($e^-$) and 3.5 GeV ($e^+$)

Measurements of the total production rates and momentum distributions of the charmed baryon $\Lambda_c^+$ in $e^+e^- \to$ hadrons at a centre-of-mass energy of 10.54 GeV and in $\Upsilon(4S)$ decays.

BABAR_2007_S7266081

Measurements of Semi-Leptonic Tau Decays into Three Charged Hadrons
Experiment: BaBar (PEP-II)
Inspire ID: 756323
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Phys.Rev.Lett.100:011801,2008
  • arXiv: 0707.2981
  • SLAC-R-936
Beams: e+ e-
Beam energies: (3.5, 8.0) GeV
Run details:
  • Tau production, can be any process but original data was in $e^+ e^-$ at the $\Upsilon(4S)$ resonance, with CoM boosts of 8.0 GeV ($e^-$) and 3.5 GeV ($e^+$)

Measurement of tau decays to three charged hadrons using a data sample corresponding to an integrated luminosity of 342 fb$^{-1}$ collected with the BABAR detector at the SLAC PEP-II electron-positron storage ring operating at a center-of-mass energy near 10.58 GeV.

BABAR_2013_I1116411

Exclusive semileptonic Bplus to omega decays.
Experiment: BABAR (PEP-II)
Inspire ID: 1116411
Status: VALIDATED
Authors:
  • Holger Schulz
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • Events with B-decays, either particle guns or collisions.

Implementation of Lorentz invariant q2 distributions ("form factor") for semileptonic Bplus decays

BABAR_2013_I1238276

Production of charged pions, kaons, and protons in $e^+e^-$ annihilations into hadrons at $\sqrt{s}=10.54$GeV
Experiment: BaBar (PEP-II)
Inspire ID: 1238276
Status: VALIDATED
Authors:
  • Peter Richardson
References: Beams: e+ e-
Beam energies: (3.5, 8.0) GeV
Run details:
  • $e^+ e^-$ analysis in the continuum near the $\Upsilon(4S)$ resonance, with CoM boosts of 8.0 GeV ($e^-$) and 3.5 GeV ($e^+$)

Measurement of charged pion, kaon and proton production in $e^+e^-$ collisions with the BABAR detector at the SLAC PEP-II electron-positron storage ring operating at a center-of-mass energy of 10.54 GeV. This is a measurement in the continuum.

BABAR_2015_I1334693

Exclusive semileptonic D0 to piminus decays.
Experiment: BABAR (PEP-II)
Inspire ID: 1334693
Status: VALIDATED
Authors:
  • Holger Schulz
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • Events with D-decays, either particle guns or collisions.

Implementation of Lorentz invariant q2 distributions ("form factor") for semileptonic D0 decays

BELLE_2001_S4598261

Measurement of inclusive production of neutral pions from $\Upsilon(4S)$ decays.
Experiment: Belle (KEKB)
Inspire ID: 554520
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Phys.Rev. D64 (2001) 072001
  • hep-ex/0103041
Beams: e+ e-
Beam energies: (3.5, 8.0) GeV
Run details:
  • $e^+ e^-$ analysis on the $\Upsilon(4S)$ resonance, with CoM boosts of 8.0 GeV ($e^-$) and 3.5 GeV ($e^+$)

Measurement of the mean multiplicity and the momentum spectrum of neutral pions from the decays of the Upsilon(4S) resonance using the Belle detector operating at the KEKB $e^+e^-$ storage ring. Useful for tuning $B$ meson decay models.

BELLE_2008_I786560

Measurement of Semi-Leptonic Tau Decays into $\pi^\pm\pi^0$
Experiment: Belle (KEKB)
Inspire ID: 786560
Status: VALIDATED
Authors:
  • Peter Richardson
References: Beams: e+ e-
Beam energies: (3.5, 8.0) GeV
Run details:
  • Tau production, can be any process but original data was in $e^+ e^-$ at the $\Upsilon(4S)$ resonance, with CoM boosts of 8.0 GeV ($e^-$) and 3.5 GeV ($e^+$)

High-statistics measurement of the branching fraction for $\tau\to\pi^-\pi^0\nu_\tau$ and the invariant mass spectrum of the produced $\pi^-\pi^0$ system using 72.2fb$^{-1}$of data recorded with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider.

BELLE_2011_I878990

Exclusive semileptonic B0 to pi minus decays.
Experiment: BELLE (KEKB)
Inspire ID: 878990
Status: VALIDATED
Authors:
  • Holger Schulz
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • Events with B-decays, either particle guns or collisions.

Implementation of Lorentz invariant q2 distributions ("form factor") for semileptonic B0 decays

BELLE_2013_I1216515

Pion and kaon identified particle spectra at $\sqrt{s}=10.52$ GeV
Experiment: Belle (KEKB)
Inspire ID: 1216515
Status: VALIDATED
Authors:
  • Peter Richardson
References: Beams: e+ e-
Beam energies: (3.5, 7.9) GeV
Run details:
  • $e^+ e^-$ analysis at 10.52

Analysis of the identified particle spectra for charged pions and kaons at 10.52 GeV. This is continuum data below the $\Upsilon(4S)$ resonance.

BELLE_2013_I1238273

Exclusive semileptonic B-decays
Experiment: BELLE (KEKB)
Inspire ID: 1238273
Status: VALIDATED
Authors:
  • Holger Schulz
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • Events with B-decays, either particle guns or collisions.

Implementation of Lorentz invariant q2 distributions ("form factor") for semileptonic B decays

BELLE_2015_I1397632

Exclusive semileptonic B to D decays.
Experiment: BELLE (KEKB)
Inspire ID: 1397632
Status: VALIDATED
Authors:
  • Holger Schulz
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • Events with B-decays, either particle guns or collisions.

Implementation of Lorentz invariant recoil w distributions for semileptonic B decays

BELLE_2017_I1512299

Decay kinematics of semileptonc B0bar to D*+ decays.
Experiment: BELLE (KEKB)
Inspire ID: 1512299
Status: VALIDATED
Authors:
  • Holger Schulz
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • Semileptonic B0bar (-511) decays.

Unfolded measurement of recoil w, helicity and decay plane angles of semileptonc B0bar to D*+ decays. The data was used to determine Vcb. Note that the data in the paper does not account for the bin wodths. The data shipped with rivet is divided by the bin width and all curves are normalised to the partial width of B0bar-> D*+ ell nu

CDF_1988_S1865951

CDF transverse momentum distributions at 630 GeV and 1800 GeV.
Experiment: CDF (Tevatron Run I)
Inspire ID: 263320
Status: VALIDATED
Authors:
  • Christophe Vaillant
  • Andy Buckley
References: Beams: p- p+
Beam energies: (315.0, 315.0); (900.0, 900.0) GeV
Run details:
  • QCD min bias events at $\sqrt{s} = 630$ GeV and 1800 GeV, $|\eta| < 1.0$.

Transverse momentum distributions at 630 GeV and 1800 GeV based on data from the CDF experiment at the Tevatron collider.

CDF_1990_S2089246

CDF pseudorapidity distributions at 630 and 1800 GeV
Experiment: CDF (Tevatron Run 0)
Inspire ID: 283352
Status: VALIDATED
Authors:
  • Andy Buckley
References: Beams: p- p+
Beam energies: (315.0, 315.0); (900.0, 900.0) GeV
Run details:
  • QCD min bias events at $\sqrt{s} = 630$ and 1800 GeV. Particles with $c \tau > 10$\;mm should be set stable.

Pseudorapidity distributions based on the CDF 630 and 1800 GeV runs from 1987. All data is detector corrected. The data confirms the UA5 measurement of a $\mathrm{d}{N}/\mathrm{d}{\eta}$ rise with energy faster than $\ln{\sqrt{s}}$, and as such this analysis is important for constraining the energy evolution of minimum bias and underlying event characteristics in MC simulations.

CDF_1993_S2742446

Angular distribution of prompt photon
Experiment: CDF (Tevatron Run 1)
Inspire ID: 354237
Status: UNVALIDATED
Authors:
  • Frank Siegert
References: Beams: p- p+
Beam energies: (900.0, 900.0) GeV
Run details:
  • All prompt photon production processes in $p \bar{p}$ at 1800 GeV. Hadronisation should be switched off, because non-prompt photon production has been corrected for.

Data taken with the Collider Detector at Fermilab (CDF) during the 1988-1989 run of the Tevatron are used to measure the distribution of the center-of-mass (rest frame of the initial state partons) angle between isolated prompt photons and the beam direction. WARNING --- Implemented is the simplified c.m. definition given in the paper. The rise of the data and the MC predictions presented in the latter could not be reproduced.

CDF_1994_S2952106

CDF Run I color coherence analysis.
Experiment: CDF (Tevatron Run 1)
Inspire ID: 374155
Status: VALIDATED
Authors:
  • Lars Sonnenschein
  • Andy Buckley
References: Beams: p- p+
Beam energies: (900.0, 900.0) GeV
Run details:
  • QCD events at $\sqrt{s} = 1800$ GeV. Leading jet $p_\perp_\text{min} = 100$ GeV.

CDF Run I color coherence analysis. Events with $\ge 3$ jets are selected and Et distributions of the three highest-pT jets are obtained. The plotted quantities are the $\Delta{R}$ between the 2nd and 3rd leading jets in the pT and pseudorapidity of the 3rd jet, and $\alpha = \mathrm{d}{\eta}/\mathrm{d}{\phi}$, where $\mathrm{d}{\eta}$ is the pseudorapidity difference between the 2nd and 3rd jets and $\mathrm{d}{\phi}$ is their azimuthal angle difference. Since the data has not been detector-corrected, a bin by bin correction is applied, based on the distributions with ideal and CDF simulation as given in the publication.

CDF_1996_S3108457

Properties of high-mass multijet events
Experiment: CDF (Tevatron Run 1)
Inspire ID: 393345
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p- p+
Beam energies: (900.0, 900.0) GeV
Run details:
  • Pure QCD events without underlying event (the paper states that UE was corrected for). Several runs with different kinematic cuts might be needed to fill the 2,3,4,5 and 6-jet properly.

Properties of two-, three-, four-, five-, and six-jet events... Multijet-mass, leading jet angle, jet pT.

CDF_1996_S3349578

Further properties of high-mass multijet events
Experiment: CDF (Tevatron Run 1)
Inspire ID: 418504
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p- p+
Beam energies: (900.0, 900.0) GeV
Run details:
  • Pure QCD events without underlying event (the paper states that UE was corrected for). Several runs with different kinematic cuts might be needed to fill the 2,3,4,5 and 6-jet properly.

Multijet distributions corresponding to ($4N-4$) variables that span the $N$-body parameter space in inclusive $N = 3$-, 4-, and 5-jet events.

CDF_1996_S3418421

Dijet angular distributions
Experiment: CDF (Tevatron Run 1)
Inspire ID: 423414
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p- p+
Beam energies: (900.0, 900.0) GeV
Run details:
  • QCD dijet events at Tevatron $\sqrt{s}=1.8$ TeV without MPI.

Measurement of jet angular distributions in events with two jets in the final state in 5 bins of dijet invariant mass. Based on $106 \mathrm{pb}^{-1}$

CDF_1997_S3541940

Properties of six-jet events with large six-jet mass
Experiment: CDF (Tevatron Run 1)
Inspire ID: 442265
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p- p+
Beam energies: (900.0, 900.0) GeV
Run details:
  • Pure QCD events without underlying event.

Multijet distributions corresponding to 20 variables that span the 6-body parameter space in inclusive 6-jet events.

CDF_1998_S3618439

Differential cross-section for events with large total transverse energy
Experiment: CDF (Tevatron Run 1)
Inspire ID: 448075
Status: VALIDATED
Authors:
  • Frank Siegert
References:
  • Phys.Rev.Lett.80:3461-3466,1998
  • 10.1103/PhysRevLett.80.3461
Beams: p- p+
Beam energies: (900.0, 900.0) GeV
Run details:
  • QCD events at Tevatron with $\sqrt{s}=1.8$ TeV without MPI.

Measurement of the differential cross section $\mathrm{d}\sigma/\mathrm{d}E_\perp^j$ for the production of multijet events in $p\bar{p}$ collisions where the sum is over all jets with transverse energy $E_\perp^j > E_\perp^\mathrm{min}$.

CDF_2000_S4155203

Z pT measurement in CDF Z -> $e^+e^-$ events
Experiment: CDF (Tevatron Run 1)
Inspire ID: 505738
Status: VALIDATED
Authors:
  • Hendrik Hoeth
References: Beams: p- p+
Beam energies: (900.0, 900.0) GeV
Run details:
  • $p\bar{p}$ collisions at 1800 GeV. $Z/\gamma^*$ Drell-Yan events with $e^+e^-$ decay mode only. Restrict $Z/\gamma^*$ mass range to roughly $50 \text{GeV}/c^2 < m_{ee} < 120 \text{GeV}/c^2$ for efficiency.

Measurement of transverse momentum and total cross section of $e^+e^-$ pairs in the Z-boson region of $66 \text{GeV}/c^2 < m_{ee} < 116 \text{GeV}/c^2$ from pbar-p collisions at $\sqrt{s} = 1.8$ TeV, with the Tevatron CDF detector. The $Z$ $p_\perp$, in a fully-factorised picture, is generated by the momentum balance against initial state radiation (ISR) and the primordial/intrinsic $p_\perp$ of the $Z$'s parent partons in the incoming hadrons. The $Z$ $p_\perp$ is important in generator tuning to fix the interplay of ISR and multi-parton interactions (MPI) in generating `underlying event' activity. This analysis is subject to ambiguities in the experimental Z pT definition, since the Rivet implementation reconstructs the Z momentum from the dilepton pair with finite cones for QED bremstrahlung summation, rather than non-portable direct use of the (sometimes absent) Z in the event record.

CDF_2000_S4266730

Inclusive jet cross section differential in dijet mass
Experiment: CDF (Tevatron Run 1)
Inspire ID: 511377
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p- p+
Beam energies: (900.0, 900.0) GeV
Run details:
  • Dijet events at Tevatron with $\sqrt{s}=1.8$ TeV

Measurement of the cross section for production of two or more jets as a function of dijet mass in the range 180 to 1000 GeV. It is based on an integrated luminosity of $86 \mathrm{pb}^{-1}$.

CDF_2001_S4517016

Two jet triply-differential cross-section
Experiment: CDF (Tevatron Run 1)
Inspire ID: 538041
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p- p+
Beam energies: (900.0, 900.0) GeV
Run details:
  • Dijet events at Tevatron with $\sqrt{s}=1.8$ TeV

A measurement of the two-jet differential cross section, $\mathrm{d}^3\sigma/\mathrm{d}E_T \, \mathrm{d}\eta_1 \, \mathrm{d}\eta_2$, based on an integrated luminosity of $86 \mathrm{pb}^{-1}$. The differential cross section is measured as a function of the transverse energy, $E_\perp$, of a jet in the pseudorapidity region $0.1 < |\eta_1| < 0.7$ for four different pseudorapidity bins of a second jet restricted to $0.1 < |\eta_2| < 3.0$.

CDF_2001_S4563131

Inclusive jet cross-section
Experiment: CDF (Tevatron Run 1)
Inspire ID: 552797
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p- p+
Beam energies: (900.0, 900.0) GeV
Run details:
  • Dijet events at Tevatron with $\sqrt{s}=1.8$ TeV

Measurement of the inclusive jet cross-section for jet transverse energies from 40 to 465 GeV in the pseudorapidity range $0.1<|\eta|<0.7$. The results are based on 87 $\mathrm{pb}^{-1}$ of data.

CDF_2001_S4751469

Field & Stuart Run I underlying event analysis.
Experiment: CDF (Tevatron Run 1)
Inspire ID: 564673
Status: VALIDATED
Authors:
  • Andy Buckley
References:
  • Phys.Rev.D65:092002,2002
  • FNAL-PUB 01/211-E
Beams: p- p+
Beam energies: (900.0, 900.0) GeV
Run details:
  • $p\bar{p}$ QCD interactions at 1800 GeV. The leading jet is binned from 0--49 GeV, and histos can usually can be filled with a single generator run without kinematic sub-samples.

The original CDF underlying event analysis, based on decomposing each event into a transverse structure with ``toward'', ``away'' and ``transverse'' regions defined relative to the azimuthal direction of the leading jet in the event. Since the toward region is by definition dominated by the hard process, as is the away region by momentum balance in the matrix element, the transverse region is most sensitive to multi-parton interactions. The transverse regions occupy $|\phi| \in [60^\circ, 120^\circ]$ for $|\eta| < 1$. The $p_\perp$ ranges for the leading jet are divided experimentally into the `min-bias' sample from 0--20 GeV, and the `JET20' sample from 18--49 GeV.

CDF_2002_S4796047

CDF Run 1 charged multiplicity measurement
Experiment: CDF (Tevatron Run 1)
Inspire ID: 567774
Status: VALIDATED
Authors:
  • Hendrik Hoeth
References: Beams: p- p+
Beam energies: (315.0, 315.0); (900.0, 900.0) GeV
Run details:
  • QCD events at $\sqrt{s} = 630$ and 1800 GeV.

A study of $p\bar{p}$ collisions at $\sqrt{s} = 1800$ and 630 GeV collected using a minimum bias trigger in which the data set is divided into two classes corresponding to `soft' and `hard' interactions. For each subsample, the analysis includes measurements of the multiplicity, transverse momentum (pT) spectra, and the average pT and event-by-event pT dispersion as a function of multiplicity. A comparison of results shows distinct differences in the behavior of the two samples as a function of the center of mass energy. The properties of the soft sample are invariant as a function of c.m. energy. It should be noticed that minimum bias tunings of PYTHIA made by ATLAS in early 2010, which used this among all other available data from CDF and from ATLAS at 900 GeV and 7 TeV, found an unavoidable tension between this data and the rest. Accordingly, this data was excluded from the fits. Whether this reflects a problem with this dataset or with the PYTHIA MPI model is a judgement for users to make!

CDF_2004_S5839831

Transverse cone and `Swiss cheese' underlying event studies
Experiment: CDF (Tevatron Run 1)
Inspire ID: 647490
Status: VALIDATED
Authors:
  • Andy Buckley
References: Beams: p- p+
Beam energies: (315.0, 315.0); (900.0, 900.0) GeV
Run details:
  • QCD events at $\sqrt{s} = 630$ \& 1800 GeV. Several $p_\perp^\text{min}$ cutoffs are probably required to fill the profile histograms, e.g. 0 (min bias), 30, 90, 150 GeV at 1800 GeV, and 0 (min bias), 20, 90, 150 GeV at 630 GeV.

This analysis studies the underlying event via transverse cones of $R = 0.7$ at 90 degrees in \phi relative to the leading (highest E) jet, at $\sqrt{s} = 630$ and 1800 GeV. This is similar to the 2001 CDF UE analysis, except that cones, rather than the whole central \eta range are used. The transverse cones are categorised as `TransMIN' and `TransMAX' on an event-by-event basis, to give greater sensitivity to the UE component. `Swiss Cheese' distributions, where cones around the leading $n$ jets are excluded from the distributions, are also included for $n = 2, 3$. This analysis is useful for constraining the energy evolution of the underlying event, since it performs the same analyses at two distinct CoM energies. WARNING! The pT plots are normalised to raw number of events. The min bias data have not been reproduced by MC, and are not recommended for tuning.

CDF_2005_S6080774

Differential cross sections for prompt diphoton production
Experiment: CDF (Tevatron Run 2)
Inspire ID: 667384
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • $p \bar{p} \to \gamma \gamma$ [+ jets] at 1960 GeV. The analysis uses photons with pT larger then 13 GeV. To allow for shifts in the shower, the ME cut on the transverse photon momentum shouldn't be too hard, e.g. 5 GeV.

Measurement of the cross section of prompt diphoton production in $p\bar{p}$ collisions at $\sqrt{s} = 1.96$ TeV using a data sample of 207 pb$^{-1}$ as a function of the diphoton mass, the transverse momentum of the diphoton system, and the azimuthal angle between the two photons.

CDF_2005_S6217184

CDF Run II jet shape analysis
Experiment: CDF (Tevatron Run 2)
Inspire ID: 682179
Status: VALIDATED
Authors:
  • Lars Sonnenschein
  • Andy Buckley
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • QCD events at $\sqrt{s} = 1960$ GeV. Jet $p_\perp^\text{min}$ in plots is 37 GeV/$c$ -- choose a generator min $p_\perp$ well below this.

Measurement of jet shapes in inclusive jet production in $p \bar{p}$ collisions at center-of-mass energy $\sqrt{s} = 1.96$ TeV. The data cover jet transverse momenta from 37--380 GeV and absolute jet rapidities in the range 0.1--0.7.

CDF_2006_S6450792

Inclusive jet cross section differential in pT
Experiment: CDF (Tevatron Run 2)
Inspire ID: 699933
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • $p\bar{p}$ -> jets at 1960 GeV

Measurement of the inclusive jet cross section in ppbar interactions at $\sqrt{s}=1.96$ TeV using 385 $\mathrm{pb}^{-1}$ of data. The data cover the jet transverse momentum range from 61 to 620 GeV/c in $0.1 < |y| < 0.7$. This analysis has been updated with more data in more rapidity bins in CDF_2008_S7828950.

CDF_2006_S6653332

b-jet cross section in Z + jets events
Experiment: CDF (Tevatron Run 2)
Inspire ID: 717572
Status: VALIDATED
Authors:
  • Lars Sonnenschein
  • Steffen Schumann <s.schumann(at)thphys.uni-heidelberg.de>
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • Z + jets events at $\sqrt{s} = 1960$ GeV. Jets min $p_\perp$ cut = 20 GeV, leptons min $p_\perp$ cut = 10\;GeV

Measurement of the $b$-jet cross section in events with $Z$ boson in $p\bar{p}$ collisions at center-of-mass energy $\sqrt{s} = 1.96$ TeV. The data cover jet transverse momenta above 20 GeV and jet pseudorapidities in the range -1.5 to 1.5. $Z$ bosons are identified in their electron and muon decay modes in an invariant dilepton mass range between 66 and 116 GeV.

CDF_2007_S7057202

CDF Run II inclusive jet cross-section using the kT algorithm
Experiment: CDF (Tevatron Run 2)
Inspire ID: 743342
Status: VALIDATED
Authors:
  • David Voong
  • Frank Siegert
References:
  • Phys.Rev.D75:092006,2007
  • Erratum-ibid.D75:119901,2007
  • FNAL-PUB 07/026-E
  • hep-ex/0701051
Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • p-pbar collisions at 1960 GeV. Jet pT bins from 54 GeV to 700 GeV. Jet rapidity $< |2.1|$.

CDF Run II measurement of inclusive jet cross sections at a p-pbar collision energy of 1.96 TeV. Jets are reconstructed in the central part of the detector ($|y|<2.1$) using the kT algorithm with an $R$ parameter of 0.7. The minimum jet pT considered is 54 GeV, with a maximum around 700 GeV. The inclusive jet pT is plotted in bins of rapidity $|y|<0.1$, $0.1<|y|<0.7$, $0.7<|y|<1.1$, $1.1<|y|<1.6$ and $1.6<|y|<2.1$.

CDF_2008_S7540469

Measurement of differential Z/$\gamma^*$ + jet + X cross sections
Experiment: CDF (Tevatron Run 2)
Inspire ID: 768451
Status: VALIDATED
Authors:
  • Frank Siegert
References:
  • Phys.Rev.Lett.100:102001,2008
  • arXiv: 0711.3717
Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • $p \bar{p} \to e^+ e^-$ + jets at 1960 GeV. Needs mass cut on lepton pair to avoid photon singularity, looser than $66 < m_{ee} < 116$

Cross sections as a function of jet transverse momentum in 1 and 2 jet events, and jet multiplicity in $p \bar{p}$ collisions at $\sqrt{s} = 1.96$ TeV, based on an integrated luminosity of $1.7 \text{fb}^{-1}$. The measurements cover the rapidity region $|y_\text{jet}| < 2.1$ and the transverse momentum range $p_\perp^\text{jet} > 30 \text{GeV}/c$.

CDF_2008_S7541902

Jet pT and multiplicity distributions in W + jets events
Experiment: CDF (Tevatron Run 2)
Inspire ID: 768579
Status: VALIDATED
Authors:
  • Ben Cooper
  • Emily Nurse
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • Requires the process $p\bar{p} \rightarrow {W} \rightarrow {e}\nu$. Additional hard jets will also have to be included to get a good description. The LO process in Herwig is set with IPROC=1451.

Measurement of the cross section for W boson production in association with jets in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV. The analysis uses 320 pb$^{-1}$ of data collected with the CDF II detector. W bosons are identified in their $e\nu$ decay channel and jets are reconstructed using an $R < 0.4$ cone algorithm. For each $W + \geq$ n-jet sample (where n = 1--4) a measurement of d$\sigma({p}\bar{p} \rightarrow W + \geq$ n jet)/d$E_T(n^{th}$-jet) $\times$ BR($W \rightarrow{e}\nu$) is made, where d$E_T(n^{th}$-jet) is the Et of the n$^{th}$-highest Et jet above 20 GeV. A measurement of the total cross section, $\sigma(p\bar{p} \rightarrow W + \geq$ $n$-jet) $\times$ BR($W \rightarrow{e}\nu)$ with $E_T(n^{th}-jet) > 25$ GeV is also made. Both measurements are made for jets with $|\eta| < 2$ and for a limited region of the $W \rightarrow{e}\nu$ decay phase space; $|\eta^{e}| < 1.1$, $p_{T}^{e} > 20$ GeV, $p_{T}^{\nu} > 30$ GeV and $M_{T} > 20$ GeV. The cross sections are corrected for all detector effects and can be directly compared to particle level $W$ + jet(s) predictions. These measurements can be used to test and tune QCD predictions for the number of jets in and kinematics of $W$ + jets events.

CDF_2008_S7782535

CDF Run II $b$-jet shape paper
Experiment: CDF (Tevatron Run 2)
Inspire ID: 787780
Status: VALIDATED
Authors:
  • Alison Lister
  • Emily Nurse
  • Andy Buckley
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • Requires $2 \rightarrow 2$ QCD scattering processes. The minimum jet $E_\perp$ is 52\;GeV, so kinematic cuts on pTmin may be required for statistical validity.

A measurement of the shapes of $b$-jets using 300 pb$^{-1}$ of data obtained with CDF II in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV. The measured quantity is the average integrated jet shape, which is computed over an ensemble of jets. This quantity is expressed as $\Psi(r/R) = \langle\frac{p_\perp(0 \rightarrow r)}{p_\perp(0 \rightarrow R)}\rangle$, where $p_\perp(0 \rightarrow r)$ is the scalar sum of the transverse momenta of all objects inside a sub-cone of radius $r$ around the jet axis. The integrated shapes are by definition normalized such that $\Psi(r/R =1) = 1$. The measurement is done in bins of jet pT in the range 52 to 300\;GeV/$c$. The jets have $|\eta| < 0.7$. The $b$-jets are expected to be broader than inclusive jets. Moreover, $b$-jets containing a single $b$-quark are expected to be narrower than those containing a $b \bar{b}$ pair from gluon splitting.

CDF_2008_S7828950

CDF Run II inclusive jet cross-section using the Midpoint algorithm
Experiment: CDF (Tevatron Run 2)
Inspire ID: 790693
Status: VALIDATED
Authors:
  • Craig Group
  • Frank Siegert
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • Requires $2\rightarrow{2}$ QCD scattering processes. The minimum jet $E_\perp$ is 62 GeV, so a cut on kinematic pTmin may be required for good statistics.

Measurement of the inclusive jet cross section in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV as a function of jet $E_\perp$, for $E_\perp >$ 62 GeV. The data is collected by the CDF II detector and has an integrated luminosity of 1.13 fb$^{-1}$. The measurement was made using the cone-based Midpoint jet clustering algorithm in rapidity bins within $|y|<2.1$. This measurement can be used to provide increased precision in PDFs at high parton momentum fraction $x$.

CDF_2008_S8093652

Dijet mass spectrum
Experiment: CDF (Tevatron Run 2)
Inspire ID: 805902
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • $p \bar{p} \to$ jets at 1960 GeV

Dijet mass spectrum from 0.2 TeV to 1.4 TeV in $p \bar{p}$ collisions at $\sqrt{s} = 1.96$ TeV, based on an integrated luminosity of 1.13 fb$^{-1}$.

CDF_2008_S8095620

CDF Run II Z+b-jet cross section paper, 2 fb-1
Experiment: CDF (Tevatron Run 2)
Inspire ID: 806082
Status: VALIDATED
Authors:
  • Emily Nurse
  • Steffen Schumann <s.schumann(at)thphys.uni-heidelberg.de>
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • Requires the process $p\bar{p} \rightarrow {Z} \rightarrow{\ell}\ell$, where $\ell$ is $e$ or $\mu$. Additional hard jets will also have to be included to get a good description.

Measurement of the b-jet production cross section for events containing a $Z$ boson produced in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV, using data corresponding to an integrated luminosity of 2 fb$^{-1}$ collected by the CDF II detector at the Tevatron. $Z$ bosons are selected in the electron and muon decay modes. Jets are considered with transverse energy $E_T>20$ GeV and pseudorapidity $|\eta|<1.5$. The ratio of the integrated $Z$ + b-jet cross section to the inclusive $Z$ production cross section is measured differentially in jet $E_T$, jet $\eta$, $Z$-boson transverse momentum, number of jets, and number of b-jets. The first two measurements have an entry for each b-jet in the event, the last three measurements have one entry per event.

CDF_2009_I856131

Z rapidity measurement
Experiment: CDF (Tevatron Run 2)
Inspire ID: 856131
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • $p \bar{p} \to e^+ e^-$ + jets at 1960 GeV. Needs mass cut on lepton pair to avoid photon singularity, looser than $66 < m_{ee} < 116$ GeV

CDF measurement of the total cross section and rapidity distribution, $\mathrm{d}\sigma/\mathrm{d}y$, for $q\bar{q}\to \gamma^{*}/Z\to e^{+}e^{-}$ events in the $Z$ boson mass region ($66<M_{ee}<116$ GeV/c$^2$) produced in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV with 2.1 fb$^{-1}$ of integrated luminosity.

CDF_2009_NOTE_9936

CDF Run 2 min bias charged multiplicity analysis
Experiment: CDF (Tevatron Run 2)
Spires ID: None
Status: OBSOLETE
Authors:
  • Holger Schulz
References:
  • CDF public note 9936
  • http://www-cdf.fnal.gov/physics/new/qcd/minbias_mult09/multpage.html
Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • $p\bar{p}$ QCD interactions at 1960 GeV. Particles with $c \tau > 10$ mm should be set stable.

Niccolo Moggi's min bias analysis. Minimum bias events are used to measure the charged multiplicity distribution. The multiplicity distribution was not published in S8233977 but the numbers and a public note are available from the CDF website given above. Note: the systematic and statistical errors in Rivet were added in quadrature.

CDF_2009_S8233977

CDF Run 2 min bias cross-section analysis
Experiment: CDF (Tevatron Run 2)
Inspire ID: 817466
Status: VALIDATED
Authors:
  • Hendrik Hoeth
  • Niccolo' Moggi
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • $p\bar{p}$ QCD interactions at 1960 GeV. Particles with $c \tau > 10$ mm should be set stable.

Niccolo Moggi's min bias analysis. Minimum bias events are used to measure the average track pT vs. charged multiplicity, a track pT distribution and an inclusive $\sum E_T$ distribution.

CDF_2009_S8436959

Measurement of the inclusive isolated prompt photon cross-section
Experiment: CDF (Tevatron Run 2)
Inspire ID: 834437
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • $\gamma$ + jet processes in ppbar collisions at $\sqrt{s} = 1960$ GeV. Minimum pT cut on the photon in the analysis is 30 GeV.

A measurement of the cross section for the inclusive production of isolated photons. The measurement covers the pseudorapidity region $|\eta^\gamma|<1.0$ and the transverse energy range $E_T^\gamma>30$ GeV and is based on 2.5 fb$^{-1}$ of integrated luminosity. The cross section is measured differential in $E_\perp(\gamma)$.

CDF_2010_S8591881_DY

CDF Run 2 underlying event in Drell-Yan
Experiment: CDF (Tevatron Run 2)
Inspire ID: 849042
Status: VALIDATED
Authors:
  • Hendrik Hoeth
References:
  • Phys.Rev.D82:034001,2010
Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • ppbar collisions at 1960 GeV. * Drell-Yan events with $Z/\gamma* -> e e$ and $Z/\gamma* -> \mu\mu$. * A mass cut $m_{ll} > 70 \text{GeV}$ can be applied on generator level. * Particles with $c \tau > 10 \text{mm}$ should be set stable.

Deepak Kar and Rick Field's measurement of the underlying event in Drell-Yan events. $Z -> ee$ and $Z -> \mu\mu$ events are selected using a $Z$ mass window cut between 70 and 110 GeV. ``Toward'', ``away'' and ``transverse'' regions are defined in the same way as in the original (2001) CDF underlying event analysis. The reconstructed $Z$ defines the $\phi$ direction of the toward region. The leptons are ignored after the $Z$ has been reconstructed. Thus the region most sensitive to the underlying event is the toward region (the recoil jet is boosted into the away region).

CDF_2010_S8591881_QCD

CDF Run 2 underlying event in leading jet events
Experiment: CDF (Tevatron Run 2)
Inspire ID: 849042
Status: VALIDATED
Authors:
  • Hendrik Hoeth
References:
  • Phys.Rev.D82:034001,2010
Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • $p\bar{p}$ QCD interactions at 1960 GeV. Particles with $c \tau > {}$10 mm should be set stable. Several $p_\perp^\text{min}$ cutoffs are probably required to fill the profile histograms. $p_\perp^\text{min} = {}$ 0 (min bias), 10, 20, 50, 100, 150 GeV. The corresponding merging points are at $p_T = $ 0, 30, 50, 80, 130, 180 GeV

Rick Field's measurement of the underlying event in leading jet events. If the leading jet of the event is within $|\eta| < 2$, the event is accepted and ``toward'', ``away'' and ``transverse'' regions are defined in the same way as in the original (2001) CDF underlying event analysis. The leading jet defines the $\phi$ direction of the toward region. The transverse regions are most sensitive to the underlying event.

CDF_2012_I1124333

CDF measurement of the Z pT in the electron channel using 2.1 fb-1
Experiment: CDF (Tevatron)
Inspire ID: 1124333
Status: VALIDATED
Authors:
  • Simone Amoroso
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • $Z\to ee$ event, a cut on the dilepton invariant mass between 60 and 120 GeV can be added to increase statistics

Measurement of the Z boson pT in the electron channel performed by the CDF experiment, using ppbar at 1960 GeV. A cut on the dielectron invariant mass of $66 GeV < m_{ee} < 116 GeV$ is applied.

CDF_2012_NOTE10874

CDF energy scan underlying event analysis
Experiment: CDF (Tevatron energy scan)
Status: VALIDATED
Authors:
  • Rick Field
References:
  • CDF Note 10874
Beams: p- p+
Beam energies: (150.0, 150.0); (450.0, 450.0); (980.0, 980.0) GeV
Run details:
  • $p\bar{p}$ QCD interactions at 300, 900, and 1960 GeV. Particles with $c \tau > {}$10 mm should be set stable.

In this analysis the behavior of the underlying event in hard scattering proton-antiproton collisions at 300 GeV, 900 GeV, and 1.96 TeV is studied. The 300 GeV and 900 GeV data are a result of the Tevatron Energy Scan which was performed just before the Tevatron was shut down. The energy ratio histograms can be created from different runs with a merging script available in the Rivet bin directory.

CDF_2015_I1388868


Experiment: ()
Status: UNVALIDATED
No authors listed No references listed
Beams: * *
Beam energies: ANY
    No run details listed

CLEO_2004_S5809304

Charm hadrons from fragmentation near the $\Upsilon(4S)$
Experiment: ()
Inspire ID: 645209
Status: VALIDATED
Authors:
  • Peter Richardson
References: Beams: e+ e-
Beam energies: (5.3, 5.3) GeV
Run details:
  • $e^+ e^-$ analysis near the $\Upsilon(4S)$ resonance

Analysis of charm quark fragmentation at 10.5 GeV, based on a data sample of 103 fb collected by the CLEO experiment. Fragmentation into charm is studied for the charmed hadron ground states, namely $D^0$, $D^+$, as well as the excited states $D^{*0}$ and $D^{*+}$. This analysis can be used to constrain charm fragmentation in Monte Carlo generators.

CMSTOTEM_2014_I1294140

Charged particle pseudorapidity distribution at $\sqrt{s}$=8 TeV
Experiment: CMS, TOTEM (LHC)
Inspire ID: 1294140
Status: VALIDATED
Authors:
  • Panos Katsas (Panos.Katsas@desy.de)
References:
  • CERN-PH-EP-2014-063
  • arXiv: 1405.0722
  • Submitted to EPJ C
Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • Inclusive, NSD-enhanced and SD-enhanced pp events.

The pseudorapidity distribution of charged particles produced in proton-proton collisions at a centre-of-mass energy of 8 TeV are measured in the ranges $|\eta| < 2.2$ and $5.3 < |\eta| < 6.4$, with the CMS and TOTEM detectors, respectively. The measurement is performed with a one-side TOTEM trigger, which is sensitive to 99\% of non-diffractive interactions and diffractive interactions with masses above 3.6 GeV, for three different event selections. An inclusive sample with the least selection bias, a sample enhanced in non-single diffractive events, and a sample enhanced in single-diffractive events were selected.

CMS_2010_S8547297

Charged particle transverse momentum and pseudorapidity spectra from proton-proton collisions at 900 and 2360 GeV.
Experiment: CMS (LHC)
Inspire ID: 845323
Status: VALIDATED
Authors:
  • A. Knutsson
References: Beams: p+ p+
Beam energies: (450.0, 450.0); (1180.0, 1180.0) GeV
Run details:
  • Non-single-diffractive (NSD) events only. Should include double-diffractive (DD) events and non-diffractive (ND) events but NOT single-diffractive (SD) events. Examples, in Pythia6 the SD processes to be turned off are 92 and 93, and in Pythia8 the SD processes are 103 and 104 (also called SoftQCD:singleDiffractive).

Charged particle spectra are measured in proton-proton collisions at center-of-mass energies 900 and 2360 GeV. The spectra are normalized to all non-single-diffractive (NSD) events using corrections for trigger and selection efficiency, acceptance, and branching ratios. There are transverse-momentum (pT) spectra from 0.1 to 2 GeV in bins of pseudorapidity (eta) and pT spectra from 0.1 to 4 GeV for |eta|<2.4. The eta spectra come from the average of three methods and cover |eta|<2.5 and are corrected to include all pT. The data were corrected according to the SD/DD/ND content of the CMS trigger, as predicted by PYTHIA6. The uncertainties connected with correct or incorrect modelling of diffraction were included in the systematic errors.

CMS_2010_S8656010

Charged particle transverse momentum and pseudorapidity spectra from proton-proton collisions at 7000 GeV.
Experiment: CMS (LHC)
Inspire ID: 855299
Status: VALIDATED
Authors:
  • A. Knutsson
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Non-single-diffractive (NSD) events only. Should include double-diffractive (DD) events and non-diffractive (ND) events but NOT single-diffractive (SD) events. For example, in Pythia6 the SD processes to be turned off are 92 and 93, and in Pythia8 the SD processes are 103 and 104 (also called SoftQCD:singleDiffractive).

Charged particle spectra are measured in proton-proton collisions at center-of-mass energies 7000 GeV. The spectra are normalized to all non-single-diffractive (NSD) events using corrections for trigger and selection efficiency, acceptance, and branching ratios. There are transverse-momentum ($p_\perp$) spectra from 0.1 to 2 GeV in bins of pseudorapidity ($\eta$) and the $p_\perp$ spectrum from 0.1 to 6 GeV for $|\eta| < 2.4$. The $\eta$ spectra come from the average of three methods and cover $|\eta| < 2.5$ and are corrected to include all $p_\perp$. The data were corrected according to the SD/DD/ND content of the CMS trigger, as predicted by PYTHIA6. The uncertainties connected with correct or incorrect modelling of diffraction were included in the systematic errors.

CMS_2011_I954992

Exclusive photon-photon production of muon pairs in proton-proton collisions at $\sqrt{s} = 7$ TeV
Experiment: CMS (LHC)
Inspire ID: 954992
Status: VALIDATED
Authors:
  • David d'Enterria
  • Jonathan Hollar
  • Sercan Sen
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • gamma gamma TO mu+ mu- process.

A measurement of the exclusive two-photon production of muon pairs in proton-proton collisions at at a centre-of-mass energy 7 TeV with the final state $p \mu^+ \mu^- p$, is reported using data corresponding to an integrated luminosity of 40 pb$^-1$ collected in 2010. The measured cross section is obtained with a fit to the dimuon $p_T$ distribution for muon pairs with invariant mass greater than 11.5 GeV with each muon $p_T > 4$ GeV and $|\eta| < 2.1$.

CMS_2011_S8884919

Measurement of the NSD charged particle multiplicity at $\sqrt{s} = 0.9$, 2.36, and 7 TeV with the CMS detector.
Experiment: CMS (LHC)
Inspire ID: 879315
Status: VALIDATED
Authors:
  • Romain Rougny
References: Beams: p+ p+
Beam energies: (450.0, 450.0); (1180.0, 1180.0); (3500.0, 3500.0) GeV
Run details:
  • Non-single-diffractive (NSD) events only. Should include double-diffractive (DD) events and non-diffractive (ND) events but NOT single-diffractive (SD) events. For example, in Pythia6 the SD processes to be turned off are 92 and 93 and in Pythia8 the SD processes are 103 and 104 (also called SoftQCD:singleDiffractive).

Measurements of primary charged hadron multiplicity distributions are presented for non-single-diffractive events in proton-proton collisions at centre-of-mass energies of $\sqrt{s} = 0.9$, 2.36, and 7 TeV, in five pseudorapidity ranges from $|\eta| < 0.5$ to $|\eta| < 2.4$. The data were collected with the minimum-bias trigger of the CMS experiment during the LHC commissioning runs in 2009 and the 7 TeV run in 2010. The average transverse momentum as a function of the multiplicity is also presented. The measurement of higher-order moments of the multiplicity distribution confirms the violation of Koba-Nielsen-Olesen scaling that has been observed at lower energies.

CMS_2011_S8941262

Production cross-sections of muons from $b$ hadron decays in $pp$ collisions
Experiment: CMS (LHC)
Inspire ID: 884811
Status: VALIDATED
Authors:
  • Wolfram Erdmann
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Inclusive QCD at 7 TeV, with no pT cuts.

A measurement of the $b$-hadron production cross-section in proton-proton collisions at $\sqrt{s} = 7$ TeV. The dataset, corresponding to 85 inverse nanobarns, was recorded with the CMS experiment at the LHC using a low-threshold single-muon trigger. Events are selected by the presence of a muon with transverse momentum greater than 6 GeV with respect to the beam direction and pseudorapidity less than 2.1. The transverse momentum of the muon with respect to the closest jet discriminates events containing $b$ hadrons from background. The inclusive $b$-hadron production cross section is presented as a function of muon transverse momentum and pseudorapidity.

CMS_2011_S8950903

Dijet azimuthal decorrelations in $pp$ collisions at $\sqrt{s} = 7$ TeV
Experiment: CMS (LHC)
Inspire ID: 885663
Status: VALIDATED
Authors:
  • Tomo Umer
References:
  • Phys. Rev. Lett. 106 (2011) 122003
  • arXiv: 1101.5029
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Inclusive QCD at $\sqrt{s} = 7\;\text{TeV}$, $\hat{p_\perp} (or equivalent) greater than 20 GeV

Measurements of dijet azimuthal decorrelations in $pp$ collisions at $\sqrt{s} = 7$ TeV using the CMS detector at the CERN LHC are presented. The analysis is based on an inclusive dijet event sample corresponding to an integrated luminosity of 2.9/pb. Jets are anti-$k_t$ with $R = 0.5$, $p_\perp > 80 (30)$ GeV and $|\eta| < 1.1$.

CMS_2011_S8957746

Event shapes
Experiment: CMS (LHC)
Inspire ID: 886332
Status: VALIDATED
Authors:
  • Hendrik Hoeth
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • pp QCD interactions at 7000 GeV. Particles with c*tau>10mm are stable.

Central transverse Thrust and Minor have been measured in proton-proton collisions at $\sqrt{s} = 7$ TeV, with a data sample collected with the CMS detector at the LHC. The sample corresponds to an integrated luminosity of 3.2 inverse picobarns. Input for the variables are anti-$k_t$ jets with $R = 0.5$.

CMS_2011_S8968497

Measurement of dijet angular distributions and search for quark compositeness in $pp$ collisions at $\sqrt{s} = 7$ TeV
Experiment: CMS (LHC)
Inspire ID: 889175
Status: VALIDATED
Authors:
  • A. Hinzmann
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • QCD dijet events

Measurement of dijet angular distributions in proton-proton collisions at a center-of-mass energy of 7 TeV. The data sample, collected with single jet triggers, has a total integrated luminosity of 36 pb$^{-1}$, with jets being reconstructed using the anti-$k_t$ clustering algorithm with $R=0.5$. The data are presented for the variable $\chi$ defined as $\chi = \exp(|y_1 - y_2|)$ where $y_1$ and $y_2$ are the rapidities of the two leading (highest $p_\perp$) jets.'

CMS_2011_S8973270

$B/\bar{B}$ angular correlations based on secondary vertex reconstruction in $pp$ collisions
Experiment: CMS (LHC)
Inspire ID: 889807
Status: VALIDATED
Authors:
  • Lukas Wehrli
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Inclusive QCD at 7 TeV. A $\hat{p_\perp}$ cut (or similar) is recommended since a leading jet $p_\perp > 56$ GeV is required.

The differential $B\bar{B}$ cross-section is measured as a function of the opening angle $\Delta{R}$ and $\Delta\phi$ using data collected with the CMS detector during 2010 and corresponding to an integrated luminosity of 3.1 pb$^{-1}$. The measurement is performed for three different event energy scales, characterized by the transverse momentum of the leading jet in the event (above 56 GeV, above 84 GeV and above 120 GeV). Simulated events are normalised in the region $\Delta{R} > 2.4$ and $\Delta\phi > 3/4\pi$ respectively.

CMS_2011_S8978280

$K_s$, $\Lambda$, and Cascade$-$ transverse momentum and rapidity spectra at 900 and 7000 GeV.
Experiment: CMS (LHC)
Inspire ID: 890166
Status: VALIDATED
Authors:
  • Kevin Stenson
References: Beams: p+ p+
Beam energies: (450.0, 450.0); (3500.0, 3500.0) GeV
Run details:
  • Non-single-diffractive (NSD) events only. Should include double-diffractive (DD) events and non-diffractive (ND) events but NOT single-diffractive (SD) events. For example, in Pythia6 the SD processes to be turned off are 92 and 93, and in Pythia8 the SD processes are 103 and 104 (also called SoftQCD:singleDiffractive).

The spectra of $K_S$, $\Lambda$, and Cascade- particles were measured versus transverse-momentum ($p_\perp$) and rapidity ($y$) in proton-proton collisions at center-of-mass energies 900 and 7000 GeV. The production is normalized to all non-single-diffractive (NSD) events using corrections for trigger and selection efficiency, acceptance, and branching ratios. The results cover a rapidity range of $|y| < 2$ and a $p_\perp$ range from 0 to 10 GeV ($K_S$ and $\Lambda$) and 0 to 6 GeV (Cascade-). Antiparticles are included in all measurements so only the sums of $\Lambda$ and $\bar{\Lambda}$, and Cascade$-$ and anti-Cascade$-$ are given. The rapidity distributions are shown versus $|y|$ but normalized to a unit of $y$. Ratios of $\Lambda$/$K_S$ and Cascade$-$/$\Lambda$ production versus $p_\perp$ and $|y|$ are also given, with somewhat smaller systematic uncertainties than obtained from taking the ratio of the individual distributions.' The data were corrected according to the SD/DD/ND content of the CMS trigger, as predicted by PYTHIA6. The uncertainties connected with correct or uncorrect modelling of diffraction were included in the systematic errors.

CMS_2011_S9086218

Measurement of the inclusive jet cross-section in $pp$ collisions at $\sqrt{s} = 7$ TeV
Experiment: CMS (LHC)
Inspire ID: 902309
Status: VALIDATED
Authors:
  • Rasmus Sloth Hansen<rsh07@phys.au.dk>
References:
  • http://cdsweb.cern.ch/record/1355680
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Inclusive QCD at 7TeV comEnergy, ptHat (or equivalent) greater than 10 GeV

The inclusive jet cross section is measured in pp collisions with a center-of-mass energy of 7 TeV at the LHC using the CMS experiment. The data sample corresponds to an integrated luminosity of 34 inverse picobarns. The measurement is made for jet transverse momenta in the range 18-1100 GeV and for absolute values of rapidity less than 3. Jets are anti-kt with $R=0.5$, $p_\perp>18$ GeV and $|y|<3.0$.

CMS_2011_S9088458

Measurement of ratio of the 3-jet over 2-jet cross section in $pp$ collisions at $\sqrt{s} = 7$ TeV
Experiment: CMS (LHC)
Inspire ID: 912560
Status: VALIDATED
Authors:
  • Tomo Umer
References:
  • Phys. Lett. B 702 (2011) 336
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Inclusive QCD at 7 TeV. $\hat{p_\perp}$ (or equivalent) greater than 30 GeV

A measurement of the ratio of the inclusive 3-jet to 2-jet cross sections as a function of the total jet transverse momentum, $H_T$, in the range $0.2 < H_T < 2.5$ TeV is presented. The data have been collected at a proton--proton centre-of-mass energy of 7\;TeV with the CMS detector at the LHC, and correspond to an integrated luminosity of 36/pb. Jets are anti-$k_t$ with $R = 0.5$, $p_\perp > 50\;\text{GeV}$ and $|\eta| < 2.5$.

CMS_2011_S9120041

Traditional leading jet UE measurement at $\sqrt{s} = 0.9$ and 7 TeV
Experiment: CMS (LHC)
Inspire ID: 916908
Status: VALIDATED
Authors:
  • Mohammed Zakaria (mzakaria@ufl.edu)
References:
  • J. High Energy Phys 09 (2011) 109
Beams: p+ p+
Beam energies: (450.0, 450.0); (3500.0, 3500.0) GeV
Run details:
  • Requires inclusive inelastic events (non-diffractive and inelastic diffractive). The profile plots require large statistics.

A measurement of the underlying activity in scattering processes with a hard scale in the several-GeV region is performed in proton-proton collisions at Energies of 0.9 and 7\;TeV, using data collected by the CMS experiment at the LHC. The production of charged particles with pseudorapidity |eta| < 2 and transverse momentum $p_\perp > 0.5$\;GeV/$c$ is studied in the azimuthal region transverse to that of the leading set of charged particles forming a track-jet. Various comparisons are made between the two different energies and also beteen two sets of cuts on p_\perp for leading track jet p_\perp-leading $> 3$\;GeV and pT-leading $> 20$\;GeV. The activity is studied using 5 types of plots. Two profile plots for the multiplicity of charged particles and the scalar sum of p_\perp. and three distributions for the two previous quantities as well as p_\perp for all the particles in the transverse region.

CMS_2011_S9215166

Forward energy flow in MB and dijet events at 0.9 and 7 TeV
Experiment: CMS (LHC)
Inspire ID: 930319
Status: VALIDATED
Authors:
  • S. Dooling
  • A. Knutsson
References: Beams: p+ p+
Beam energies: (450.0, 450.0); (3500.0, 3500.0) GeV
Run details:
  • $pp$ MB and QCD interactions at 0.9 and 7 TeV. No pT-cuts.

Forward energy flow measured by CMS at $\sqrt{s} = 0.9$ and 7 TeV in MB and dijet events.

CMS_2012_I1087342

Measurement of forward and forward+central jets at $\sqrt{s} = 7$ TeV
Experiment: CMS (LHC)
Inspire ID: 1087342
Status: VALIDATED
Authors:
  • Albert Knutsson
  • Rasmus Sloth Hansen
  • Bo Zhu
References:
  • JHEP 1206 (2012) 036
  • CMS-FWD-11-002
  • CERN-PH-EP-2011-179
  • doi 10.1007/JHEP06(2012)036
  • arXiv: 1202.0704
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • pp QCD interactions at 7 TeV.

Inclusive forward jets and forward+central jets measured by CMS at $\sqrt{s} = 7$ TeV.

CMS_2012_I1090423

Dijet angular distributions in $pp$ collisions at $\sqrt{s} = 7$ TeV
Experiment: CMS (LHC)
Inspire ID: 1090423
Status: VALIDATED
Authors:
  • A. Hinzmann
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • QCD events with dijet mass greater 400 GeV

Measurement of dijet angular distributions in proton-proton collisions at a center-of-mass energy of 7 TeV. The data sample has a total integrated luminosity of 2.2 inverse femtobarns, recorded by the CMS experiment at the LHC. Normalized dijet angular distributions have been measured for dijet invariant masses from 0.4 TeV to above 3 TeV.

CMS_2012_I1102908

Measurement of inclusive and exclusive dijet production ratio at large rapidity intervals at center-of-mass energy 7 TeV.
Experiment: CMS (LHC)
Inspire ID: 1102908
Status: VALIDATED
Authors:
  • Grzegorz Brona
  • Vladimir Gavrilov
  • Hannes Jung
  • Victor Kim
  • Victor Murzin
  • Vadim Oreshkin
  • Grigory Pivovarov
  • Ivan Pozdnyakov
  • Grigory Safronov
References:
  • CMS-FWD-10-014
  • CERN-PH-EP-2012-088
  • arXiv: 1204.0696
  • Submitted to the EPJ C
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Inclusive QCD at 7TeV comEnergy, ptHat (or equivalent) greater than 15 GeV

This is a measurement of the ratio of inclusive to exclusive dijet production as a function of the absolute distance in rapidity, $\Delta y$, between jets. The ratio of the Mueller-Navelet to exclusive dijet production is also measured. These measurements were performed with the CMS detector in proton-proton collisions at $\sqrt{s} = 7$ TeV for jets with $p_T > 35$ GeV and $|y| < 4.7$ taken from a mixture of two data samples, one of which containing dijets with moderate rapidity separation and the other containing dijets with large rapidity separation, with integrated luminosity of 33/nb and 5/pb respectively. The measured observables are corrected for detector effects.

CMS_2012_I1107658

Measurement of the underlying event activity in the Drell-Yan process at a centre-of-mass energy of 7 TeV
Experiment: CMS (LHC)
Inspire ID: 1107658
Status: VALIDATED
Authors:
  • Sunil Bansal (sunil.bansal@cern.ch)
References:
  • CMS-QCD-11-012
  • CERN-PH-EP-2012-085
  • arXiv: 1204.1411
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Drell-Yan events with $Z/\gamma^* \to \mu\mu$. $m(\mu,\mu) > 20$ GeV

A measurement of the underlying event activity using Drell-Yan events using muonic final state. The production of charged particles with pseudorapidity $|\eta| < 2$ and transverse momentum $p_\perp > 0.5\,\text{GeV}/c$ is studied in towards, transverse and away region w.r.t. to the direction of di-muon system. The UE activity is measured in terms of of a particle density and an energy density. The particle density is computed as the average number of primary charged particles per unit pseudorapidity and per unit azimuth. The energy density is expressed in terms of the average of the scalar sum of the transverse momenta of primary charged particles per unit pseudorapidity and azimuth. The ratio of the energy and particle density is also reported in 3 regions. UE activity is studied as a function of invariant mass of muon pair ($M_{\mu\mu}$) by limiting the ISR contribution by requiring transverse momentum of muon pair $p_\perp(\mu\mu) < 5\,\text{GeV}/c$. The $p_\perp(\mu\mu)$ dependence is studied for the events having $M_{\mu\mu}$ in window of 81--101 GeV/$c$. The normalized charged particle multiplicity and $p_\perp$ spectrum of the charged particles in three regions also been reported for events having $M_{\mu\mu}$ in window of 81--101 GeV/$c$. Multiplicity and $p_\perp$ spectra in the transverse region are also reported, for events having $p_\perp(\mu\mu) < 5\,\text{GeV}/c$.

CMS_2012_I1184941

Measurement of the differential cross section for inclusive dijet production as a function of $\xi$ in 7 TeV proton-proton collisions.
Experiment: CMS (LHC)
Inspire ID: 1184941
Status: VALIDATED
Authors:
  • Sercan Sen
  • Alexander Proskuryakov
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • High statistics is needed to observe events in the lowest (xi) bin. Distributions are presented for hard QCD events (i.e. with $\hat{p_\perp}$ greater than 15 GeV) and diffractive-enhanced events.

Measurement of the differential cross section for inclusive dijet production as a function of $\xi$ which approximates the fractional momentum loss of the scattered proton in single-diffraction events. The data used has a total integrated luminosity of 2.7 nb$^{-1}$ collected during 2010 with low instantaneous luminosity. Events are selected with at least two jets in $|\eta| < 4.4$ with $p_\perp > 20$ GeV and all final states particles are used for the reconstruction of $\xi$.

CMS_2012_I1193338

Measurement of the inelastic proton-proton cross section at $\sqrt{s} = 7$ TeV
Experiment: CMS (LHC)
Inspire ID: 1193338
Status: VALIDATED
Authors:
  • Sercan Sen
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Inelastic events (non-diffractive and inelastic diffractive).

The inelastic cross-section is measured through two independent methods based on information from (i) forward calorimetry (for pseudorapidity $3 < |\eta| < 5$), in collisions where at least one proton loses more than $\xi > 5 \cdot 10^{-6}$ of its longitudinal momentum, and (ii) the central tracker ($|\eta| < 2.4$), in collisions containing an interaction vertex with more than 1, 2, or 3 tracks with $p_\perp > 200\;\text{MeV}/c$.

CMS_2012_I1298807

Inclusive ZZ production cross section and constraints on anomalous triple gauge couplings at 8 TeV
Experiment: CMS (LHC)
Inspire ID: 1298807
Status: VALIDATED
Authors:
  • Alexander Savin
  • Ian Ross
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • ZZ production, leptonic Z decays

A measurement of the inclusive ZZ production cross section and constraints on anomalous triple gauge couplings in proton-proton collisions at $\sqrt{s} = 8 TeV$ are presented. The analysis is based on a data sample, corresponding to an integrated luminosity of 19.6/fb, collected with the CMS experiment at the LHC. The measurements are performed in the leptonic decay modes $ZZ \to lll^\prime l^\prime$, where $l = e,\mu$ and $l^\prime = e, \mu, \tau$. The measured total cross section $ \sigma (pp \to ZZ) = 7.7 \pm 0.5 (stat) + 0.5 -0.4 (syst) \pm 0.4 (theo) \pm 0.2 (lumi) pb$, for both Z bosons produced in the mass range $60 < m_Z < 120 \text{GeV}$, is consistent with standard model predictions. Differential cross sections, in phase space $p_T(\mu) > 5 \text{GeV}$, $p_T(e) > 7 \text{GeV}$, $|\eta(\mu)|<2.4$ , $|\eta(e)|<2.5$ and the 60--120 GeV mass requirement, are measured and well described by the theoretical predictions. The invariant mass distribution of the four-lepton system is used to set limits on anomalous $ZZZ$ and $ZZ\gamma$ couplings at the $95\%$ confidence level, $-0.004 < f4Z < 0.004$, $-0.004 < f5Z < 0.004$, $-0.005 < f4\gamma < 0.005$, and $−0.005 < f5\gamma < 0.005.$

CMS_2012_I941555

Measurement of differential $Z/\gamma^*$ $p_T$ and y
Experiment: CMS (LHC)
Inspire ID: 941555
Status: VALIDATED
Authors:
  • Luca Perrozzi
  • Justin Hugon
References:
  • Phys.Rev. D85 (2012) 032002
  • arXiv: 1110.4973
  • CMS-EWK-10-010
  • CERN-PH-EP-2011-169
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • $p p \to \mu^+ \mu^-$+X 7 TeV. Needs mass cut on lepton pair to avoid photon singularity, restrict $Z/\gamma^*$ mass range to roughly $50 \text{GeV}/c^2 < m_{\mu\mu} < 130 \text{GeV}/c^2$ for efficiency. Result is corrected for QED FSR (i.e. leptons are dressed), so turn off in generator.

Cross section as a function of $p_T$ and y of the Z boson decaying into muons in p p collisions at $\sqrt{s}$ = 7 TeV. $p_T$ and y cross sections are measured for $60 < m_{\mu\mu} < 120$ GeV. The $p_T$ cross section is measured for lepton $p_T > 20$ GeV and $\eta < 2.1$, while the y cross section is extrapolated to all lepton $p_T$ and $\eta$. This measurement was performed using 36 pb$^{-1}$ of data collected during 2010 with the CMS detector at the LHC.

CMS_2012_PAS_QCD_11_010

Strange particle production in underlying events in proton--proton collisions at $\sqrt{s} = 7$ TeV
Experiment: CMS (LHC)
Inspire ID: ~
Status: PRELIMINARY
Authors:
  • Sercan Sen
References:
  • CMS-PAS-QCD-11-010
  • http://cdsweb.cern.ch/record/1463352
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Inelastic events (non-diffractive and inelastic diffractive) at $\sqrt{s} = 7$\;TeV.

Measurements of the production of $K^0_S$, $\Lambda$ and $\bar{\Lambda}$ particles in the underlying activity of events with a $p_\perp$ scale ranging from 1 to 50 GeV/$c$ in $pp$ collisions at $\sqrt{s} = 7$\;TeV.

CMS_2013_I1122847

Forward-backward asymmetry A_FB in Drell-Yan lepton pairs at sqrt(s) = 7 TeV
Experiment: CMS (LHC)
Inspire ID: 1122847
Status: VALIDATED
Authors:
  • Markus Radziej
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Drell-Yan events with an electron or muon final state are necessary. High statistics as well as a NLO generator are recommended for a good agreement

This analysis measures the forward-backward asymmetry $A_{FB}$ in Drell-Yan events at a center-of-mass energy of 7 TeV. Both the individual and combined electron and muon pair channels are analyzed. In four rapidity regions, $A_{FB}$ is given as a function of the lepton mass. The data, recorded with the CMS detector, corresponds to an integrated luminosity of $5\,\textrm{fb}^{-1}$.

CMS_2013_I1208923

Jet-pT and dijet mass at sqrt(s) = 7 TeV
Experiment: CMS (LHC)
Inspire ID: 1208923
Status: VALIDATED
Authors:
  • Markus Radziej
  • Samatha Dooling
No references listed
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Hard QCD process with a flat pT spectrum is recommended.

The single jet differential cross section has been measured as a function of the jet momentum and the dijet differential cross section as a function of the dijet mass. The data has been recorded by the CMS detector at the center of mass energy of 7 TeV. To reconstruct the jets, the anti-$k_T$ algorithm with a cone radius of $R = 0.7$ (AK7) has been used. The results are split into five rapditiy bins, ranging from 0.0 to 2.5 with a width of 0.5 each.

CMS_2013_I1209721

Azimuthal correlations and event shapes in $Z$ + jets in $pp$ collisions at 7 TeV
Experiment: CMS (LHC)
Inspire ID: 1209721
Status: VALIDATED
Authors:
  • Io Odderskov
References:
  • http://cms.cern.ch/iCMS/analysisadmin/cadi?ancode=EWK-11-021
  • https://cds.cern.ch/record/1503578
  • http://inspirehep.net/record/1209721
  • arXiv: 1301.1646
  • Submitted to Phys. Lett. B
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Run MC generators with Z decaying to leptonic modes at 7TeV comEnergy

Measurements are presented of event shapes and azimuthal correlations in the inclusive production of a Z boson in association with jets in proton-proton collisions. The data correspond to an integrated luminosity of 5.0/fb, collected with the CMS detector at the CERN LHC at $\sqrt{s} = 7$\;TeV. This to test perturbative QCD predictions and evaluate a substantial background to most physics channels. Studies performed as a function of jet multiplicity for inclusive $Z$ boson production and for $Z$ bosons with transverse-momenta greater than 150\;GeV, are compared to predictions from Monte Carlo event generators that include leading-order multiparton matrix-element (with up to four hard partons in the final state) and next-to-leading-order simulations of Z + 1-jet events. The results are corrected for detector effects, and can therefore be used as input to improve models for describing these processes.

CMS_2013_I1218372

Study of the underlying event at forward rapidity in proton--proton collisions at the LHC
Experiment: CMS (LHC)
Inspire ID: 1218372
Status: VALIDATED
Authors:
  • Samantha Dooling
References:
  • JHEP 1304 (2013) 072
  • 10.1007/JHEP04(2013)072
  • CMS-FWD-11-003
  • arXiv: 1302.2394
Beams: p+ p+
Beam energies: (450.0, 450.0); (1380.0, 1380.0); (3500.0, 3500.0) GeV
Run details:
  • Inelastic events (non-diffractive and diffractive) at $\sqrt{s}$ = 0.9, 2.76 and 7 TeV.

Ratio of the energy deposited in the pseudorapidity range $-6.6 < \eta < -5.2$ for events with a charged particle jet with $|\eta|<2$ with respect to the energy in inclusive events, as a function of charged particle jet transverse momentum for $\sqrt{s}=$0.9, 2.76 and 7 TeV.

CMS_2013_I1223519

Searches for SUSY using $\alpha_T$ and $b$-quark multiplicity at 8 \text{TeV}
Experiment: CMS (LHC)
Inspire ID: 1223519
Status: UNVALIDATED
Authors:
  • Andy Buckley
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • SM background or BSM physics model, depending on interpretation usage

An inclusive search for supersymmetric processes that produce final states with jets and missing transverse energy in $pp$ collisions at 8\;\text{TeV}. The data sample corresponds to an integrated luminosity of 11.7/fb collected by the CMS experiment. In this search, a dimensionless kinematic variable, $\alpha_T$, is used to discriminate between events with genuine and misreconstructed missing transverse energy. The search was based on an examination of the number of reconstructed jets per event, the scalar sum of transverse energies of these jets, and the number of these jets identified as originating from bottom quarks. No significant excess of events over the standard model expectation was found.

CMS_2013_I1224539_DIJET

CMS jet mass measurement in dijet events
Experiment: CMS (LHC)
Inspire ID: 1224539
Status: VALIDATED
Authors:
  • salvatore.rappoccio@cern.ch
  • ntran@fnal.gov
  • kalanand@fnal.gov
  • dlopes@mail.cern.ch
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • 7 TeV $pp$ collisions. Events are required to have at least 2 jets with $(p_\perp_1 + p_\perp_2) / 2.0 > 220$ GeV with both jets satisfying $|y| < 2.4$.

Measurements of the mass spectra of the jets in dijet and $W/Z$+jet events from proton--proton collisions at a centre-of-mass energy of 7 TeV using a data sample of integrated luminosity of 5 fb$^-1$. The jets are reconstructed using the both the anti-$k_T$ algorithm with $R=0.7$ (AK7) and the Cambridge-Aachen algorithm with $R=0.8$ (CA8) and $R=1.2$ (CA12) with several grooming techniques applied (ungroomed, filtered, pruned and trimmed). See the text of the paper for more details. For the dijet events the distributions are presented as a function of the mean mass of the two leading jets in bins of the mean p_\perp of the two jets.

CMS_2013_I1224539_WJET

CMS jet mass measurement in $W$ + jet events
Experiment: CMS (LHC)
Inspire ID: 1224539
Status: VALIDATED
Authors:
  • salvatore.rappoccio@cern.ch
  • ntran@fnal.gov
  • kalanand@fnal.gov
  • dlopes@mail.cern.ch
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • 7 TeV $pp$ collisions. Events are required to have a electron channel $W$ with $p_\perp > 120$ GeV, and at least 1 jet opposed to the $W$ with $p_\perp > 50$ GeV and $|y| < 2.4$.

Measurements of the mass spectra of the jets in dijet and $W/Z$+jet events from proton--proton collisions at a centre-of-mass energy of 7 TeV using a data sample of integrated luminosity of 5 fb$^-1$. The jets are reconstructed using the both the anti-$k_T$ algorithm with $R=0.7$ (AK7) and the Cambridge-Aachen algorithm with $R=0.8$ (CA8) and $R=1.2$ (CA12) with several grooming techniques applied (ungroomed, filtered, pruned and trimmed). See the text of the paper for more details. For the dijet events the distributions are presented as a function of the mean Mass of the two leading jets in bins of the mean p_\perp of the two jets.

CMS_2013_I1224539_ZJET

CMS jet mass measurement in $Z$ + jet events
Experiment: CMS (LHC)
Inspire ID: 1224539
Status: VALIDATED
Authors:
  • salvatore.rappoccio@cern.ch
  • ntran@fnal.gov
  • kalanand@fnal.gov
  • dlopes@mail.cern.ch
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • 7 TeV $pp$ collisions. Events are required to have a electron channel $Z$ with $p_\perp > 120$ GeV, and at least 1 jet opposed to the $Z$ with $p_\perp > 50$ GeV and $|y| < 2.4$.

Measurements of the mass spectra of the jets in dijet and $W/Z$+jet events from proton--proton collisions at a centre-of-mass energy of 7 TeV using a data sample of integrated luminosity of 5 fb$^-1$. The jets are reconstructed using the both the anti-$k_T$ algorithm with $R=0.7$ (AK7) and the Cambridge-Aachen algorithm with $R=0.8$ (CA8) and $R=1.2$ (CA12) with several grooming techniques applied (ungroomed, filtered, pruned and trimmed). See the text of the paper for more details. For the dijet events the distributions are presented as a function of the mean Mass of the two leading jets in bins of the mean p_\perp of the two jets.

CMS_2013_I1256943

Cross-section and angular correlations in $Z$ boson with $b$-hadrons events at $\sqrt{s} = 7$ TeV
Experiment: CMS (LHC)
Inspire ID: 1256943
Status: VALIDATED
Authors:
  • Lorenzo Viliani
  • Piergiulio Lenzi
References:
  • 10.1007 / JHEP12(2013)039
  • arXiv: 1310.1349
  • CERN-PH-EP-2013-153
  • CMS-EWK-11-015
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • $pp$ collisions with $\sqrt{s} = 7$ TeV. Selection of events with exactly two $b$-hadrons and a lepton pair from the $Z$ boson decay. Each lepton has $p_T > 20$ GeV and $|\eta| < 2.4$ and the dilepton invariant mass is $81 < M_{\ell\ell} < 101$ GeV. The $b$-hadrons have $p_T > 15$ GeV and $|\eta| < 2$. The differential cross sections are measured for $p_T > 0$ and $p_T > 50$ GeV.

A study of proton-proton collisions in which two $b$-hadrons are produced in association with a $Z$ boson is reported. The collisions were recorded at a centre-of-mass energy of 7 TeV with the CMS detector at the LHC, for an integrated luminosity of 5.2/fb. The $b$-hadrons are identified by means of displaced secondary vertices, without the use of reconstructed jets, permitting the study of $b$-hadron pair production at small angular separation. Differential cross sections are presented as a function of the angular separation of the $b$-hadrons and the $Z$ boson. In addition, inclusive measurements are presented. For both the inclusive and differential studies,different ranges of $Z$ boson momentum are considered.

CMS_2013_I1258128

Rapidity distributions in exclusive $Z$ + jet and $\gamma$ + jet events in $pp$ collisions at $\sqrt{s} = 7$ TeV
Experiment: CMS (LHC)
Inspire ID: 1258128
Status: VALIDATED
Authors:
  • Steve Linn
  • Shin-Shan Eiko Yu
  • Anil Sing Pratap
  • Lovedeep Kaur Saini
  • Kittikul Kovitanggoon
  • Luis Lebolo
  • Vanessa Gaultney Werner
  • Yun-Ju Lu
  • Syue-Wei Li
  • Yu-Hsiang Chang
  • Sung-Won Lee
  • Pete E.C. Markowitz
  • Darko Mekterovic
  • Jorge Rodriguez
  • Bhawan Uppal
References:
  • arXiv: 1310.3082
  • https://twiki.cern.ch/twiki/bin/view/CMSPublic/PhysicsResultsSMP12004
  • Submitted to Phys. Rev. Lett
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Run MC generators with $Z$ decaying to leptonic modes + jets and photon + jets at 7 TeV centre-of-mass energy.

Rapidity distributions are presented for events containing either a $Z$ boson or a photon in association with a single jet in proton-proton collisions produced at the CERN LHC. The data, collected with the CMS detector at $\sqrt{s} = 7$ TeV, correspond to an integrated luminosity of 5.0/fb. The individual rapidity distributions of the boson and the jet are consistent within 5\% with expectations from perturbative QCD. However, QCD predictions for the sum and the difference in rapidities of the two final-state objects show significant discrepancies with CMS data. In particular, next-to-leading-order QCD calculations, and two Monte Carlo event generators using different methods to merge matrix-element partons with evolved parton showers, appear inconsistent with the data as well as with each other.

CMS_2013_I1261026

Jet and underlying event properties as a function of particle multiplicity
Experiment: CMS (LHC)
Inspire ID: 1261026
Status: VALIDATED
Authors:
  • Maxim Azarkin
References:
  • Eur.Phys.J. C73 (2013) 2674
  • arXiv: 1310.4554
  • CMS-FSQ-12-022,
  • CERN-PH-EP-2013-195
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • QCD MB

Characteristics of multi-particle production in proton-proton collisions at $\sqrt{s} = 7$ TeV are studied as a function of the charged-particle multiplicity ($N_{ch}$). The produced particles are separated into two classes: those belonging to jets and those belonging to the underlying event. Charged particles are measured with pseudorapidity $|\eta| < 2.4$ and transverse momentum $p_T > 0.25$ GeV. Jets are reconstructed from charged-particles only and required to have $\pt > 5$ GeV. The distributions of jet \pt, average \pt of charged particles belonging to the underlying event or to jets, jet rates, and jet shapes are presented as functions of $N_{ch}$.

CMS_2013_I1265659

Probing color coherence effects in $pp$ collisions at $\sqrt{s} = 7$ TeV
Experiment: CMS (LHC)
Inspire ID: 1265659
Status: VALIDATED
Authors:
  • Maxime Gouzevitch
  • Chawon Park
  • Inkyu Park
References:
  • CMS-SMP-12-010
  • CERN-PH-EP-2013-200
  • arXiv: 1311.5815
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • $pp$ QCD interactions at $\sqrt{s} = 7$ TeV. Data collected by CMS during the year 2010.

A study of color coherence effects in $pp$ collisions at a center-of-mass energy of 7 TeV is presented. The data used in the analysis were collected in 2010 with the CMS detector at the LHC and correspond to an integrated luminosity of 36/pb. Events are selected that contain at least three jets and where the two jets with the largest transverse momentum exhibit a back-to-back topology. The measured angular correlation between the second- and third-leading jet is shown to be sensitive to color coherence effects, and is compared to the predictions of Monte Carlo models with various implementations of color coherence. None of the models describe the data satisfactorily.

CMS_2013_I1272853

Study of observables sensitive to double parton scattering in $W + 2$ jets process in $pp$ collisions at $\sqrt{s} = 7$ TeV
Experiment: CMS (LHC)
Inspire ID: 1272853
Status: VALIDATED
Authors:
  • Sunil Bansal (sunil.bansal@cern.ch)
References:
  • CMS-FSQ-12-028
  • CERN-PH-EP-2013-224
  • arXiv: 1312.5729
  • Submitted to JHEP
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Only muonic decay of W boson

Double parton scattering is investigated in proton-proton collisions at $\sqrt{s} = 7$ TeV where the final state includes a $W$ boson, which decays into a muon and a neutrino, and two jets. The data sample corresponds to an integrated luminosity of 5 inverse femtobarns, collected with the CMS detector at the LHC.

CMS_2013_I1273574

Studies of 4-jet production in proton-proton collisions at $\sqrt{s} = 7$ TeV
Experiment: CMS (LHC)
Inspire ID: 1273574
Status: VALIDATED
Authors:
  • P. Gunnellini
  • A. Buckley
References:
  • CMS-FSQ-12-013
  • CERN-PH-EP-2013-229
  • arXiv: 1312.6440
  • Submitted to Phys. Rev. D
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Hard QCD events with p_\perp cut at generator level of 45 GeV

Measurements are presented of exclusive 4-jet production cross sections as a function of the transverse momentum $p_T$, pseudorapidity $\eta$, as well as of correlations in azimuthal angle and $p_T$ balance among the jets. The data sample was collected at a centre-of-mass energy of 7 TeV with the CMS detector at the LHC, corresponding to an integrated luminosity of 36 pb$^{-1}$. The jets are reconstructed with the anti-$k_T$ jet algorithm in a range of $|\eta|<4.7$.

CMS_2014_I1298810

Ratios of jet pT spectra, which relate to the ratios of inclusive, differential jet cross sections
Experiment: CMS (LHC)
Inspire ID: 1260838
Status: VALIDATED
Authors:
  • Markus Radziej
References:
  • arXiv: 1406.0324
  • CMS-SMP-13-002
  • CERN-PH-EP-2014-068
  • Accepted by Phys. Rev. D
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Hard QCD events with $\hat{p}_{\text{T}} > 40\,\text{GeV}$ at $\sqrt{s} = 7\,\text{TeV}$. Either a $\hat{p}_{\text{T}}$-binned approach or a 'flat' spectrum is recommended, to generate sufficient events in the high $p_{\text{T}}$ region.

Ratios of jet transverse momentum spectra. The jets objects are defined using the anti-$k_{\text{T}}$ algorithm with radii of R = 0.5 and R = 0.7. The ratios are given for six 0.5 wide rapidity regions ranging from 0.0 to 3.0 and relate the ratio of inclusive, differential jet cross sections.

CMS_2014_I1303894

Differential cross-section of $W$ bosons + jets in $pp$ collisions at $\sqrt{s}=7$ TeV
Experiment: CMS (LHC)
Inspire ID: 1303894
Status: VALIDATED
Authors:
  • Darin Baumgartel (darinb@cern.ch)
  • Emanuela Barberis (barberis@fnal.gov)
References:
  • Phys. Lett. B741 (2014) 12-37
  • https://inspirehep.net/record/1303894
  • http://arxiv.org/abs/1406.7533
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Run MC generators with $W$ decaying leptonically at 7 TeV CoM energy. A large number of events are required to populate the high jet multiplicity region. Suitable results can be achieved with 85M events.

A study of jet production in association with $W$ bosons has been performed, in events with the $W$ decaying to a muon. Jets are required to have $pT > 30$ GeV and $|eta| < 2.4$. Muons are required to have $pT > 25$ and $|eta| < 2.1$. Jets are only considered if they are separated from the muon by $\Delta{R} > 0.5$. Muons are dressed with photons in a cone of $0.1$ around the muon.

CMS_2014_I1305624

Study of hadronic event-shape variables in multijet final states in $pp$ collisions at $\sqrt{s} = 7$ TeV
Experiment: CMS (LHC)
Inspire ID: 1305624
Status: VALIDATED
Authors:
  • Sunanda Banerjee
  • Sandeep Bhowmik
  • Monoranjan Guchait
  • Gobinda Majumder
  • Manas Maity <
  • Debarati Roy
References:
  • 10.1007/JHEP10(2014)087
  • arXiv: 1407.2856
  • CMS-PAS-SMP-12-022
  • CERN-PH-EP-2014-146
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • $pp$ QCD interactions at $\sqrt{s} = 7$ TeV. Data collected by CMS during the year 2011.

Event-shape variables, which are sensitive to perturbative and nonperturbative aspects of quantum chromodynamic (QCD) interactions, are studied in multijet events recorded in proton-proton collisions at $\sqrt{s}=7$ TeV. Events are selected with at least one jet with transverse momentum $p_T > 110$ GeV and pseudorapidity $\mid\eta\mid < 2.4$, in a data sample corresponding to integrated luminosities of up to $5 fb^{-1}$. The distributions of five event-shape variables in various leading jet $p_T$ ranges are compared to predictions from different QCD Monte Carlo event generators. Five event-shape variables are analyzed in this paper: the transverse thrust $\tau_{\perp}$, the total jet broadening $B_{tot}$, the total jet mass $\rho_{tot}$, the total transverse jet mass $\rho^T_{tot}$ and the third-jet resolution parameter $Y_{23}$. In the formulae below, $p_{T,i}$, $\eta_i$, and $\phi_i$ represent the transverse momentum, pseudorapidity, and azimuthal angle of the $i$th jet, and $\hat{n}_{T}$ is the unit vector that maximizes the sum of the projections of $\vec{p}_{T,i}$. The transverse thrust axis $\hat{n}_{T}$ and the beam form the so-called event plane. Based on the direction of $\hat{n}_{T}$, the transverse region is separated into an upper side $\cal{C}_U$, consisting of all jets with $\vec{p}_{T}\cdot\hat{n}_{T}$ $>$ 0, and a lower side $\cal{C}_L$, with $\vec{p}_{T}\cdot\hat{n}_{T}$ $<$ 0. The jet broadening and third-jet resolution variables require at least three jets, whereas the calculation of other variables requires at least two jets. The $\hat{n}_{T}$ vector is defined only up to a global sign - choosing one sign or the other has no consequence since it simply exchanges the upper and lower events regions. Transverse Thrust : The event thrust observable in the transverse plane is defined as \begin{eqnarray} \tau_{\perp} & \equiv & 1 - \max_{\hat{n}_{T}} \frac{\sum_i |\vec{p}_{T,i} \cdot \hat{n}_{T} |}{\sum_i p_{T,i}} \end{eqnarray} This variable probes the hadronization process and is sensitive to the modeling of two-jet and multijet topologies. In this paper ``multijet' refers to ``more-than-two-jet'. In the limit of a perfectly balanced two-jet event, $\tau_{\perp}$ is zero, while in isotropic multijet events it amounts to $(1-2/\pi)$. Jet Broadenings : The pseudorapidities and the azimuthal angles of the axes for the upper and lower event regions are defined by \begin{eqnarray} \eta_X & \equiv & \frac{\sum_{i\in{\cal{C}}_X} p_{T,i}\eta_i}{\sum_{i\in{\cal{C}}_X} p_{T,i}} , \\ \phi_X & \equiv & \frac{\sum_{i\in{\cal{C}}_X} p_{T,i}\phi_i}{\sum_{i\in{\cal{C}}_X} p_{T,i}} , \end{eqnarray} where $X$ refers to upper ($U$) or lower ($L$) side. From these, the jet broadening variable in each region is defined as \begin{eqnarray} B_{X} & \equiv & \frac{1}{2P_{T}} \sum_{i\in{\cal{C}}_X}p_{T,i}\sqrt{(\eta_i -\eta_X)^2 + (\phi_i - \phi_X)^2} , \end{eqnarray} where $P_{T}$ is the scalar sum of the transverse momenta of all the jets. The total jet broadening is then defined as \begin{eqnarray} B_{tot} & \equiv & B_{U} + B_{L}. \end{eqnarray} Jet Masses : The normalized squared invariant mass of the jets in the upper and lower regions of the event is defined by \begin{eqnarray} \rho_X & \equiv & \frac{M^2_X}{P^2}, \end{eqnarray} where $M_X$ is the invariant mass of the constituents of the jets in the region $X$, and $P$ is the scalar sum of the momenta of all constituents in both sides. The jet mass variable is defined as the sum of the masses in the upper and lower regions, \begin{eqnarray} \rho_{tot} & \equiv & \rho_U + \rho_L . \end{eqnarray} The corresponding jet mass in the transverse plane, $\rho^T_{tot}$, is also similarly calculated in transverse plane. Third-jet resolution parameter : The third-jet resolution parameter is defined as \begin{eqnarray} Y_{23} \equiv \frac{\mathrm{min}(p_{T,3}^2,[\mathrm{min}(p_{T,i}, p_{T,j})^2 \times (\Delta R_{ij})^2/R^2])}{P_{12}^2} , \end{eqnarray} where i, j run over all three jets, $(\Delta R_{ij})^2 = (\eta_i - \eta_j)^2 + (\phi_i - \phi_j)^2$, and $p_{T,3}$ is the transverse momentum of the third jet in the event. If there are more than three jets in the event, they are iteratively merged using the $k_T$ algorithm with a distance parameter $R = 0.6$. To compute $P_{12}$, three jets are merged into two using the procedure described above and $P_{12}$ is then defined as the scalar sum of the transverse momenta of the two remaining jets. The $Y_{23}$ variable estimates the relative strength of the $p_T$ of the third jet with respect to the other two jets. It vanishes for two-jet events, and a nonzero value of $Y_{23}$ indicates the presence of hard parton emission, which tests the parton showering model of QCD event generators. A test like this is less sensitive to the details of the underlying event (UE) and parton hadronization models than the other event-shape variables.

CMS_2015_I1310737

Jet multiplicity and differential cross-sections of $Z$+jets events in $pp$ at $\sqrt{s} = 7$ TeV
Experiment: CMS (LHC)
Inspire ID: 1310737
Status: VALIDATED
Authors:
  • Fabio Cossutti (fabio.cossutti@ts.infn.it)
  • Chiara La Licata (chiara.lalicata@ts.infn.it)
References:
  • Phys.Rev. D91 (2015) 052008
  • http://dx.doi.org/10.1103/PhysRevD.91.052008
  • http://arxiv.org/abs/arXiv:1408.3104
  • http://inspirehep.net/record/1310737
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Run MC generators with Z decaying leptonically into both electrons and muons at 7 TeV CoM energy. Order of 5 million unweighted events can give a reasonable global comparison, but precision in the high jet multiplicity region/high jet pt may require substantially larger samples or statistical enhancement of high jet multiplicities.

Measurements of differential cross sections are presented for the production of a Z boson and at least one hadronic jet in proton-proton collisions at $\sqrt{s}=7$ TeV, recorded by the CMS detector, using a data sample corresponding to an integrated luminosity of 4.9 $\text{fb}^{-1}$. The jet multiplicity distribution is measured for up to six jets. The differential cross sections are measured as a function of jet transverse momentum and pseudorapidity for the four highest transverse momentum jets. The distribution of the scalar sum of jet transverse momenta is also measured as a function of the jet multiplicity. The measurements are compared with theoretical predictions at leading and next-to-leading order in perturbative QCD. Cuts: First two leading electrons or muons with $p_T > 20$ GeV and $|\eta| < 2.4$ Dilepton invariant mass in the [71,111] GeV range Jets $p_T > 30$ GeV and $|\eta| < 2.4$ $\Delta{R}($lepton,jet$) > 0.5$

CMS_2015_I1327224

Search for contact interactions & extra dimensions using dijet angular distributions in proton-proton collisions at $sqrt{s} = 8$ TeV
Experiment: CMS (LHC)
Inspire ID: 1327224
Status: VALIDATED
Authors:
  • A. Hinzmann
No references listed
Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • Hard QCD process with a pT cut of 200 GeV on sub-leading jet is recommended.

A search is presented for quark contact interactions and extra spatial dimensions in proton-proton collisions at sqrt(s) = 8 TeV using dijet angular distributions. The search is based on a data set corresponding to an integrated luminosity of 19.7 fb-1 collected by the CMS detector at the CERN LHC. Dijet angular distributions are found to be in agreement with the perturbative QCD predictions that include electroweak corrections. Limits on the contact interaction scale from a variety of models at next-to-leading order in QCD corrections are obtained. A benchmark model in which only left-handed quarks participate is excluded up to a scale of 9.0 (11.7) TeV for destructive (constructive) interference at 95% confidence level. Lower limits between 6.0 and 8.4 TeV on the scale of virtual graviton exchange are extracted for the Arkani-Hamed--Dimopoulos--Dvali model of extra spatial dimensions.

CMS_2015_I1346843

Measurement of differential cross-section of FSR photons in $Z$ decays
Experiment: CMS (LHC)
Inspire ID: 1346843
Status: VALIDATED
Authors:
  • Andrew Kubik
  • Michael Schmitt
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • $p p \to \mu^+ \mu^- \gamma$+X 7 TeV. These cross sections are given for the fiducial region defined as follows - Leading muon $p_T > 31$ GeV and abs(eta) < 2.4 - Trailing muon $p_T > 9$ GeV and abs(eta) < 2.4 - Photon $p_T > 5$ GeV - Photon abs(eta) < 2.4 but not 1.4 < abs(eta) < 1.6 - Separation between photon and closest muon 0.05 < DeltaR < 3.0 - Di-muon invariant mass 30 < M_mumu < 87 GeV

The differential cross sections for the production of photons in Z to mu+ mu- gamma decays are presented as a function of the transverse energy of the photon and its separation from the nearest muon. The data for these measurements were collected with the CMS detector and correspond to an integrated luminosity of 4.7 inverse femtobarns of pp collisions at sqrt(s) = 7 TeV delivered by the CERN LHC.

CMS_2015_I1356998

Measurement of diffraction dissociation cross sections in pp collisions at sqrt(s)=7 TeV
Experiment: CMS (LHC)
Inspire ID: 1356998
Status: VALIDATED
Authors:
  • Sercan Sen
  • Robert Ciesielski
  • J. L. Cuspinera Contreras
  • Yavuz Zengindemir
References:
  • CMS-FSQ-12-005
  • CERN-PH-EP-2015-062
  • ARXIV:1503.08689 [hep-ex]
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Inelastic events (non-diffractive and inelastic diffractive).

Measurements of diffractive dissociation cross sections in pp collisions at $\sqrt{s}=7$ TeV are presented in kinematic regions defined by the masses $M_{\mathrm{X}}$ and $M_{\mathrm{Y}}$ of the two final-state hadronic systems separated by the largest rapidity gap in the event. Differential cross sections are measured as a function of $\xi_{\mathrm{X}}= M^2_{\mathrm{X}}/s$ in the region $-5.5<\log_{10}\xi_{\mathrm{X}}<-2.5$, for $\log_{10}M_{\mathrm{Y}}<0.5$, dominated by single dissociation (SD), and $0.5<\log_{10}M_{\mathrm{Y}}<1.1$, dominated by double dissociation (DD), where $M_{\mathrm{X}}$ and $M_{\mathrm{Y}}$ are given in GeV. The inclusive pp cross section is also measured as a function of the width of the central pseudorapidity gap $\Delta\eta$ for $\Delta\eta>3$, $\log_{10}M_{\mathrm{X}}>1.1$, and $\log_{10}M_{\mathrm{Y}}>1.1$, a region dominated by DD. The cross sections integrated over these regions are used to extract the total SD and DD cross sections. In addition, the inclusive differential cross section, $\mathrm{d}\sigma / \mathrm{d}\Delta\eta^\mathrm{F}$, for events with a pseudorapidity gap adjacent to the edge of the detector, is measured over $\Delta\eta^\mathrm{F}$ = 8.4 units of pseudorapidity. The results are compared to those of other experiments and to theoretical predictions, and found compatible with slowly-rising diffractive cross sections as a function of center-of-mass energy.

CMS_2015_I1370682

Differential top quark pair production cross-sections in $pp$ collisions at $\sqrt{s} = 8$ TeV
Experiment: CMS (LHC)
Inspire ID: 1370682
Status: VALIDATED
Authors:
  • Javier Fernandez
  • Jungwan John Goh
  • Efe Yazgan
  • Markus Seidel
  • James Keaveney
  • Elvire Bouvier
  • Benedikt Maier
References:
  • Eur.Phys.J. C75 (2015) 542 (the analysis)
  • CMS-PAS-TOP-15-011 (Rivet implementation)
Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • $pp$ QCD interactions at $\sqrt{s} = 8$ TeV. Data collected by CMS during the year 2012.

The reconstruction of particle-level top quarks and anti-quarks is implemented in this module. Measurements at $\sqrt{s} = 8 \text{TeV}$ are based on parton-level information in the full phase space using MADGRAPH+PYTHIA6. To match the particle-level top quark distributions to the measurements unfolded to the parton-level, a correction function to the particle-level distributions, derived using the same MADGRAPH+PYTHIA6 configuration that was used for the original measurement of the data points, is applied. Using the same MC configuration as used for the unfolding to correct back the parton-level to particle-level, the model dependence introduced in unfolding to parton-level and extrapolating the measurement to the full phase space is eliminated. See the paper for full object selection and correction details.

CMS_2015_I1370682_PARTON

Parton-level differential top-quark pair production cross-sections in $pp$ collisions at $\sqrt{s} = 8\,\text{TeV}$
Experiment: CMS (LHC)
Inspire ID: 1370682
Status: VALIDATED
Authors:
  • Jungwan John Goh
  • Markus Seidel
References:
  • Eur.Phys.J. C75 (2015) 542
Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • $t\bar{t}$ events at $\sqrt{s}= 8\,\text{TeV}$. Top quarks with physical momenta must be present in the event record.

The normalized parton level differential cross section for top quark pair production is measured in $pp$ collisions at a centre-of-mass energy of 8\,\text{TeV}.

CMS_2015_I1380605

Per-event yield of the highest transverse momentum charged particle and charged-particle jet
Experiment: CMS (LHC)
Inspire ID: 1380605
Status: VALIDATED
Authors:
  • Anastasia Grebenyuk
  • Hannes Jung
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • $sqrt{s}=8$ TeV, minbias events, no p_\perp cut on partons

The per-event yield of the highest transverse momentum charged particle and charged-particle jet, integrated above a given $p_{T\;min}$ threshold starting at $p_{T\;min}=0.8$ and $1$ GeV, respectively, is studied in $pp$ collisions at $\sqrt{s} = 8$ \text{TeV}. The particles and the jets are measured in the pseudorapidity ranges $|\eta| < 2.4$ and $1.9$, respectively.

CMS_2015_I1384119

Pseudorapidity distribution of charged hadrons in proton--proton collisions at $\sqrt{s} = 13$ TeV
Experiment: CMS (LHC)
Inspire ID: 1384119
Status: VALIDATED
Authors:
  • Hannes Jung
References: Beams: p+ p+
Beam energies: (6500.0, 6500.0) GeV
Run details:
  • $\sqrt{s}=13$ TeV, $pp$ inelastic events, no $p_T$ cut on partons

The pseudorapidity distribution of charged hadrons in $pp$ collisions at $\sqrt{s} =13$ TeV is measured using a data sample obtained with the CMS detector, operated at zero magnetic field, at the CERN LHC. The yield of primary charged long-lived hadrons produced in inelastic $pp$ collisions is determined in the central region of the CMS pixel detector ($|eta| < 2$) using both hit pairs and reconstructed tracks.

CMS_2015_I1385107

Underlying event measurement with leading jets at $\sqrt{s} = 2.76$ \text{TeV}
Experiment: CMS (LHC)
Inspire ID: 1385107
Status: VALIDATED
Authors:
  • Wei Yang Wang
  • Xavier Janssen
No references listed
Beams: p+ p+
Beam energies: ANY
Run details:
  • Requires inclusive inelastic events (non-diffractive and inelastic diffractive). The profile plots require large statistics.

A measurement of the underlying event (UE) activity in proton-proton collisions is performed using events with charged-particle jets produced in the central pseudorapidity region ($|\eta|^\text{jet} < 2$) and with transverse momentum $1 \leq p_T^\text{jet} < 100$ \text{GeV}. The analysis uses a data sample collected at a centre-of-mass energy of 2.76 \text{TeV} with the CMS experiment at the LHC. The UE activity is measured as a function of $p_T^\text{jet}$ in terms of the average multiplicity and scalar sum of transverse momenta of charged particles, with $|\eta| < 2$ and $p_T > 0.5$ \text{GeV}, in the azimuthal region transverse to the highest-$p_T$ jet direction. By further dividing the transverse region into two regions of smaller and larger activity, various components of the UE activity are separated.

CMS_2015_I1397174

Measurement of ttbar production with additional jet activity, including b quark jets, in the dilepton decay channel using pp collisions at sqrt(s)=8 TeV
Experiment: CMS (LHC)
Inspire ID: 1397174
Status: VALIDATED
Authors:
  • Javier Fernandez
  • Jungwan John Goh
  • Efe Yazgan
  • Markus Seidel
  • James Keaveney
  • Elvire Bouvier
  • Benedikt Maier
  • Andy Buckley
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • ttbar events at $\sqrt{s}=8\;\text{TeV}. Top quarks are expected in the event record to identify additional jets. Gap fractions require high statistics in a single run or custom merging of the YODA files.

Jet multiplicity distributions in top quark pair ($t\bar{t}$) events are measured in $pp$ collisions at a centre-of-mass energy of 8\;\text{TeV} with the CMS detector at the LHC, using a data set corresponding to an integrated luminosity of 19.7/fb. The measurement is performed in the dilepton decay channels $e^+e^-$, $\mu^+\mu^-$, and $e^\pm\mu^\mp$). The absolute and normalized differential cross-sections for $t\bar{t}$ production are measured as a function of jet multiplicity for different jet transverse momentum thresholds and the kinematic properties of the leading additional jets. The differential $t\bar{t}b$ and $t\bar{t}b\bar{b}$ cross-sections are presented for the first time as a function of the kinematic properties of the leading additional $b$-jets. Furthermore, the fraction of events without additional jets above a threshold is measured as a function of the transverse momenta of the leading additional jets and the scalar sum of the transverse momenta of all additional jets.

CMS_2016_I1413748

Measurements of ttbar spin correlations and top quark polarization using dilepton final states in pp collisions at sqrt(s) = 8 TeV
Experiment: CMS (LHC)
Inspire ID: 1413748
Status: VALIDATED
Authors:
  • Jacob Linacre
References:
  • Phys. Rev. D 93, 052007 (2016)
  • DOI:10.1103/PhysRevD.93.052007
  • arXiv: 1601.01107
  • https://hepdata.net/record/ins1413748
Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • Dilepton ttbar events at $\sqrt{s}=8\;\text{TeV}$, where the leptons are prompt elecrons or muons (not from tau). No other cuts. All but one of the variables require top quarks in the event record.

$\textbf{Abstract:}$ Measurements of the top quark-antiquark ($\mathrm{t\bar{t}}$) spin correlations and the top quark polarization are presented for $\mathrm{t\bar{t}}$ pairs produced in pp collisions at $\sqrt{s}=8\:$TeV. The data correspond to an integrated luminosity of 19.5 $\mathrm{fb^{-1}}$ collected with the CMS detector at the LHC. The measurements are performed using events with two oppositely charged leptons (electrons or muons) and two or more jets, where at least one of the jets is identified as originating from a bottom quark. The spin correlations and polarization are measured from the angular distributions of the two selected leptons, both inclusively and differentially, with respect to the invariant mass, rapidity, and transverse momentum of the $\mathrm{t\bar{t}}$ system. The measurements are unfolded to the parton level and found to be in agreement with predictions of the standard model. A search for new physics in the form of anomalous top quark chromo moments is performed. No evidence of new physics is observed, and exclusion limits on the real part of the chromo-magnetic dipole moment and the imaginary part of the chromo-electric dipole moment are evaluated. $\textbf{Particle-level addition to Rivet routine:}$ While the analysis was performed at the parton-level only, $\left|\Delta \phi_{\ell^+\ell^-}\right|$ is a purely leptonic variable and it has been checked that the results of the analysis would have been essentially unchanged had it been defined at particle-level using dressed leptons instead of using the parton-level top quark daughter leptons. We therefore include both particle- and parton-level versions of this distribution in the Rivet routine, with the former identified in the plot title. For same-flavour dilepton final states, the particle-level definition in the full phase space is problematic because the two leptons can come from fully-hadronic $\mathrm{t\bar{t}}$ plus a dilepton pair from radiation. Such pairs have invariant mass $M_{\ell\ell}\sim 0$ and produce a peak near zero in the $\left|\Delta \phi_{\ell^+\ell^-}\right|$ distribution. We therefore select only the $\mathrm{t\bar{t}}\to e\mu$ final state, by requiring exactly one electron and exactly one muon. Note this means $\mathrm{t\bar{t}}\to e\mu$ events with additional dilepton pairs from radiation are vetoed. For PYTHIA8 this amounts to 0.5% of $\mathrm{t\bar{t}}\to e\mu$ events - well below the level of sensitivity of the measured distribution. $\textbf{Histograms and covariance matrices:}$ The error bars in the measured distributions should not be used for fitting because there are significant correlations between bins. The covariance matrices for the statistical and systematic uncertainties in each distribution can be found in hepdata. The single-differential cross sections in hepdata are normalised to unit area (i.e. the integral is equal to one), while the double-differential cross sections in hepdata are normalised to the sum of entries (such that the sum of all bin heights is equal to one). This should be taken into account when comparing the measured distributions to the Rivet results and when using the covariance matrices. $\textbf{Overflow bins:}$ The upper $M_\mathrm{t\bar{t}}$, $p_\mathrm{T}^\mathrm{t\bar{t}}$, and $\left|y_\mathrm{t\bar{t}}\right|$ bins contain overflow events up to infinity.

CMS_2016_I1421646

Dijet azimuthal decorrelations in $pp$ collisions at $\sqrt{s} = 8$ TeV
Experiment: CMS (LHC)
Spires ID: 1421646
Status: VALIDATED
Authors:
  • Giannis Flouris, Panos Kokkas, Evangelos Paradas
  • Klaus Rabbertz, Georg Sieber
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • QCD at $\sqrt{s} = 8\;\text{TeV}$

A measurement of the decorrelation of azimuthal angles between the two jets with the largest transverse momenta is presented for seven regions of leading jet transverse momentum up to 2.2 TeV. The analysis is based on the proton-proton collision data collected with the CMS experiment at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 19.7/fb. The dijet azimuthal decorrelation is caused by the radiation of additional jets and probes the dynamics of multijet production. The results are compared to fixed-order predictions of perturbative quantum chromodynamics (QCD), and to simulations using Monte Carlo event generators that include parton showers, hadronization, and multiparton interactions. Event generators with only two outgoing high transverse momentum partons fail to describe the measurement, even when supplemented with next-to-leading-order QCD corrections and parton showers. Much better agreement is achieved when at least three outgoing partons are complemented through either next-to-leading-order predictions or parton showers. This observation emphasizes the need to improve predictions for multijet production.

CMS_2016_I1430892

Measurements of ttbar charge asymmetry using dilepton final states in pp collisions at sqrt(s) = 8 TeV
Experiment: CMS (LHC)
Inspire ID: 1430892
Status: VALIDATED
Authors:
  • Jacob Linacre
References:
  • Phys. Lett. B 760 (2016) 365
  • DOI:10.1016/j.physletb.2016.07.006
  • arXiv: 1603.06221
  • https://hepdata.net/record/ins1430892
Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • Dilepton ttbar events at $\sqrt{s}=8\;\text{TeV}$, where the leptons are prompt elecrons or muons (not from tau). No other cuts. All but one of the variables require top quarks in the event record.

$\textbf{Abstract:}$ The charge asymmetry in $\mathrm{t\bar{t}}$ events is measured using dilepton final states produced in pp collisions at the LHC at $\sqrt{s}=8\:$TeV. The data sample, collected with the CMS detector, corresponds to an integrated luminosity of 19.5 $\mathrm{fb^{-1}}$. The measurements are performed using events with two oppositely charged leptons (electrons or muons) and two or more jets, where at least one of the jets is identified as originating from a bottom quark. The charge asymmetry is measured from differences in kinematic distributions, unfolded to the parton level, of positively and negatively charged top quarks and leptons. The $\mathrm{t\bar{t}}$ and leptonic charge asymmetries are found to be 0.011 +/- 0.011 (stat) +/- 0.007 (syst) and 0.003 +/- 0.006 (stat) +/- 0.003 (syst), respectively. These results, as well as charge asymmetry measurements made as a function of $\mathrm{t\bar{t}}$ system kinematic properties, are in agreement with predictions of the standard model. $\textbf{Particle-level addition to Rivet routine:}$ While the analysis was performed at the parton-level only, $\Delta|\eta_{\ell}|$ is a purely leptonic variable and it has been checked that the results of the analysis would have been essentially unchanged had it been defined at particle-level using dressed leptons instead of using the parton-level top quark daughter leptons. We therefore include both particle- and parton-level versions of this distribution in the Rivet routine, with the former identified in the plot title. For same-flavour dilepton final states, the particle-level definition in the full phase space is problematic because the two leptons can come from fully-hadronic $\mathrm{t\bar{t}}$ plus a dilepton pair from radiation. Such pairs have invariant mass $M_{\ell\ell}\sim 0$ and produce a peak near zero in the $\Delta|\eta_{\ell}|$ distribution. We therefore select only the $\mathrm{t\bar{t}}\to e\mu$ final state, by requiring exactly one electron and exactly one muon. Note this means $\mathrm{t\bar{t}}\to e\mu$ events with additional dilepton pairs from radiation are vetoed. For PYTHIA8 this amounts to 0.5% of $\mathrm{t\bar{t}}\to e\mu$ events - well below the level of sensitivity of the measured distribution. $\textbf{Histograms and covariance matrices:}$ The error bars in the measured distributions should not be used for fitting because there are significant correlations between bins. The covariance matrices for the statistical and systematic uncertainties in each distribution can be found in hepdata. The single-differential cross sections in hepdata are normalised to unit area (i.e. the integral is equal to one), while the double-differential cross sections in hepdata are normalised to the sum of entries (such that the sum of all bin heights is equal to one). This should be taken into account when comparing the measured distributions to the Rivet results and when using the covariance matrices. $\textbf{Underflow and overflow bins:}$ The lower and upper $\Delta|y_\mathrm{t}|$ and $\Delta|\eta_{\ell}|$ bins (starting and ending at -2 and +2, respectively) contain underflow and overflow events, i.e. the complete distribution from -infinity to +infinity is covered. Similarly, the upper $M_\mathrm{t\bar{t}}$, $p_\mathrm{T}^\mathrm{t\bar{t}}$, and $\left|y_\mathrm{t\bar{t}}\right|$ bins contain overflow events up to +infinity.

CMS_2016_I1454211

Boosted $t\bar{t}$ in $pp$ collisions at $\sqrt{s} = 8 \text{TeV}$
Experiment: CMS (LHC)
Inspire ID: 1454211
Status: VALIDATED
Authors:
  • Salvatore Rappoccio
  • Maral Alyari
  • Julia Thom
  • Louise Skinnari
  • Susan Dittmer
  • Matthew Bellis
References:
  • CMS-PAS-TOP-14-012 (PAS)
  • CERN-EP-2016-078 (paper)
Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • $pp$ QCD interactions at $\sqrt{s} = 8 \text{TeV} with $t\bar{t}$ process. Data collected by CMS during the year 2012. Boosted topology restricts phase space, requiring high statistics in a single run or custom merging of the YODA files.

The cross section for pair production of top quarks with high transverse momenta ($p_{\rm T} > 400$ GeV) is measured in 19.7 fb$^{-1}$ of $\mathrm{pp}$ collisions, collected with the CMS detector at $\sqrt{s} = 8$ TeV. The measurement is performed for lepton+jets events, where one top quark decays according to $t \rightarrow Wb \rightarrow \ell \nu b$, with $\ell$ denoting an electron or muon, and the second top quark decays to an hadronic final state and is reconstructed as a single, large-radius jet and identified as a top quark candidate using jet substructure techniques. Integrated cross sections, as well as differential cross sections as a function of the top quark $p_{\rm T}$ and rapidity, are measured both at particle level within a fiducial region resembling the detector-level selections and at parton level. RIVET: This analysis is to be run on ${\rm t\bar{t}}$ Monte Carlo. It utilizes the PartonicTops projection, which assumes top quarks in the event record. The analysis has been validated with Powheg+Pythia6. The parton-level phase space is defined by requiring two PartonicTops. Exactly one PartonicTop must decay directly to a muon or electron (no intermediate tau), and exactly one PartonicTop decays hadronically. For for $t\bar{t}$ Monte Carlo, this is equivalent to requiring the event to be semileptonic at parton level. The parton-level top quark is defined as the hadronically decaying top. The parton-level top quark is required to have $p_{T} > 400$ GeV. The particle-level phase space is defined using the following object definitions: - Lepton: A dressed electron or muon, meaning the lepton has been clustered with all photons within a cone of $R=0.1$. The DressedLepton projection is used to construct the dressed lepton. The lepton is required to have $p_{T} > 45$ GeV and $|\eta| < 2.1$. - B Jet Candidate: Gen AK5 jets are formed by clustering the final state particles in the event using the anti-$k_{T}$ algorithm with distance parameter $R=0.5$. Neutrinos are excluded from the clustering, as are any particles included in the dressed lepton. The gen AK5 jet is required to have $p_{T} > 30$ GeV and $|\eta| < 2.4$. Gen AK5 jets in the same hemisphere as the lepton ($\Delta {\rm R(e/\mu, jet)} < \pi/2$) are defined as b-jet candidates. - Top Jet Candidate: Gen CA8 jets are formed by clustering the final state particles in the event using the Cambridge-Aachen algorithm with distance parameter $R=0.8$. Neutrinos are excluded from the clustering, as are any particles included in the dressed lepton. The gen CA8 jet is required to have $p_{T} > 30$ GeV and $|\eta| < 2.4$. Gen CA8 jets which have $p_{T} > 400$ GeV, 140 GeV $<$ mass $<$ 250 GeV, and are in the opposite hemisphere from the lepton ($\Delta{\rm R(e/\mu, jet)} > \pi/2$) are defined as top jet candidates. The particle-level phase space is defined by requiring $\geq 1$ b jet candidate, $\geq 1$ top jet candidate, and exactly one lepton. This is in addition to the parton-level semileptonic requirement. The highest-$p_{T}$ top jet candidate is defined as the particle-level t jet.

CMS_2016_I1459051

Measurement of the inclusive jet cross-section in $pp$ collisions at $\sqrt{s} = 13\;\text{TeV}$
Experiment: CMS (LHC)
Spires ID: 1459051
Status: VALIDATED
Authors:
  • Paolo Gunnellini
References:
  • Eur.Phys.J. C76 (2016) no.8, 451
  • CERN-EP-2016-104
  • CMS-SMP-15-007
Beams: p+ p+
Beam energies: (6500.0, 6500.0) GeV
Run details:
  • Inclusive hard QCD at 13 TeV center-of-mass energy, and ptHat (or equivalent) greater than 90 GeV

A measurement of the double-differential inclusive jet cross section as a function of jet transverse momentum pT and absolute jet rapidity |y| is presented. The analysis is based on proton-proton collisions collected by the CMS experiment at the LHC at a centre-of-mass energy of 13 TeV. The data samples correspond to integrated luminosities of 71 and 44 pb−1 for |y| < 3 and 3.2 < |y| < 4.7, respectively. Jets are reconstructed with the anti-kt clustering algorithm for two jet sizes, R, of 0.7 and 0.4, in a phase space region covering jet pT up to 2 TeV and jet rapidity up to |y| = 4.7. Predictions of perturbative quantum chromodynamics at next-to-leading order precision, complemented with electroweak and nonperturbative corrections, are used to compute the absolute scale and the shape of the inclusive jet cross section. The cross-section difference in $R$, when going to a smaller jet size of 0.4, is best described by Monte Carlo event generators with next-to-leading order predictions matched to parton showering, hadronisation, and multiparton interactions. In the phase space accessible with the new data, this measurement provides a first indication that jet physics is as well understood at $\sqrt(s) = 13\;\text{TeV}$ as at smaller centre-of-mass energies.

CMS_2016_I1473674

Measurement of the differential cross sections for top quark pair production as a function of kinematic event variables at sqrt(s) = 8 TeV
Experiment: CMS (LHC)
Inspire ID: 1473674
Status: VALIDATED
Authors:
  • Markus Seidel
  • Lukas Kreczko
  • Emyr Clement
References: Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • ttbar events at sqrt(s) = 8 TeV (inclusive or lepton+jets decay mode) Top quarks are expected in the event record to identify the decay mode.

Measurements are reported of the normalized differential cross sections for top quark pair production with respect to four kinematic event variables: the missing transverse energy; the scalar sum of the jet transverse momentum (pT); the scalar sum of the pT of all objects in the event; and the pT of leptonically decaying W bosons from top quark decays.

CMS_2016_I1486238

Studies of 2 $b$-jet + 2 jet production in proton-proton collisions at 7 TeV
Experiment: CMS (LHC)
Inspire ID: 1486238
Status: VALIDATED
Authors:
  • P. Gunnellini
References:
  • CMS-FSQ-13-010
  • CERN-EP-2016-191
  • arXiv: 1609.03489
  • Phys.Rev. D94 (2016) no.11, 112005
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Hard QCD events with p_\perp cut at generator level of 15 GeV. Needs 2 $b$-jets with $p_\perp > 20$ GeV in $|\eta|$ $<$ 2.4; 2 jets with $p_\perp > 20$ GeV in $|\eta|$ $<$ 4.7

Measurements are presented of the cross section for the production of at least four jets, of which at least two originate from $b$ quarks, in proton-proton collisions. Data collected with the CMS detector at the LHC at a center-of-mass energy of 7 TeV are used, corresponding to an integrated luminosity of 3 inverse picobarns. The cross section is measured as a function of the jet transverse momentum for p_\perp 20 GeV, and of the jet pseudorapidity for $|\eta|<2.4$ ($b$ jets) and 4.7 (untagged jets). The correlations in azimuthal angle and p_\perp between the jets are also studied. The $\eta$ and p_\perp distributions of the four jets and the correlations between them are well reproduced by event generators that combine perturbative QCD calculations at next-to-leading-order accuracy with contributions from parton showers and multiparton interactions.

CMS_2016_PAS_SUS_16_14

Search for supersymmetry in events with jets and missing transverse momentum at 13 \text{TeV}
Experiment: CMS (LHC)
Status: VALIDATED
Authors:
  • Andy Buckley
No references listed
Beams: p+ p+
Beam energies: (6500.0, 6500.0) GeV
Run details:
  • BSM physics signal events

A search for supersymmetry in all-hadronic events with large missing transverse momentum, produced in proton--proton collisions at $\sqrt{s} = 13 \text{TeV}$. The data sample, corresponding to an integrated luminosity of 12.9/fb, was collected with the CMS detector at the CERN LHC in 2016. The data are examined in search regions of jet multiplicity, tagged bottom quark jet multiplicity, missing transverse momentum, and the scalar sum of jet transverse momenta. The observed numbers of events in all search regions are found to be consistent with the expectations from standard model processes.

CMS_2017_I1511284

Measurement of the inclusive energy spectrum in the very forward direction in proton-proton collisions at 13 TeV
Experiment: CMS (LHC)
Inspire ID: 1511284
Status: VALIDATED
Authors:
  • cms-pag-conveners-fsq@cern.ch
  • sebastian.baur@cern.ch
No references listed
Beams: p+ p+
Beam energies: (6500.0, 6500.0) GeV
Run details:
  • Proton-proton beam, 13 TeV center-of-mass-energy, minimum-bias processes.

The differential cross section for inclusive particle production as a function of energy in proton-proton collisions at a center-of-mass energy of 13 TeV is measured in the very forward region of the CMS detector. The measurement is based on data collected with the CMS apparatus at the LHC, and corresponds to an integrated luminosity of 0.35 inverse microbarns. The energy is measured in the CASTOR calorimeter, which covers the pseudorapidity region $-6.6 < \eta < -5.2$. The results are given as a function of the total energy deposited in CASTOR, as well as of its electromagnetic and hadronic components. The spectra are sensitive to the modeling of multiparton interactions in pp collisions, and provide new constraints for hadronic interaction models used in collider and in high energy cosmic ray physics.

CMS_2017_I1518399

Differential $t\bar{t}$ production cross-section as a function of the leading jet mass for boosted top quarks at 8 TeV
Experiment: CMS (LHC)
Spires ID: 1518399
Status: VALIDATED
Authors:
  • Torben Dreyer
  • Roman Kogler
  • Johannes Haller
References:
  • TOP-15-015
  • arXiv: 1703.06330
  • Submitted to Eur. Phys. J. C.
Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • $t\bar{t}$ events at $\sqrt{s}=8\;\text{TeV}$. Boosted topology requires high statistics in a single run or custom merging of the YODA files.

Measurement of the differential and normalised differential $t\bar{t}$ production cross section as a function of the leading jet mass. The measurement was performed in the lepton+jets channel and the fiducial measurement phase space is enriched with events where the leading jet includes all decay products of a hadronically decaying top quark. This analysis is to be run on ${t\bar{t}}$ simulation. The objects are defined as follows - Lepton: electron or muon originating from the decay of a W boson - Jets: jets are clustered from final state particles using the Cambridge-Aachen algorithm with a distance parameter of 1.2. If a lepton overlaps with a jet (distance in the eta-phi plane smaller 1.2) its four momentum is subtracted from the four momentum of the jet. Definition of the particle level phase space: - only ${\rm t\bar{t}}$ decays with one top quark decaying hadronically and one top quark decaying leptonically including an electron or muon from the W decay. - lepton $\pt > 45\;\text{GeV}$ and $|\eta| < 2.1$ - at least one jet with $\pt > 400\;\text{GeV}$ and $|\eta| < 2.5$ - a second jet with $\pt > 150\;\text{GeV}$ and $|\eta| < 2.5$ - veto on additional jets with $\pt > 150\;\text{GeV}$ and $|\eta| < 2.5$ - distance between the second jet and the lepton in the eta-phi plane $\Delta R(jet2, lepton)$ smaller 1.2 - invariant mass of the leading jet larger than the invariant mass of the combination of the second jet and lepton The differential and normalised differential cross section was measured as a function of the leading jet mass.

CMS_2017_I1519995

Search for new physics with dijet angular distributions in proton-proton collisions at $\sqrt{s} = 13 \text{TeV}$
Experiment: CMS (CERN LHC)
Inspire ID: 1519995
Status: VALIDATED
Authors:
  • Andreas Hinzmann
References: Beams: p+ p+
Beam energies: (6500.0, 6500.0) GeV
Run details:
  • Hard QCD process with a pT cut of 200 GeV on sub-leading jet is recommended.

Dijet angular distributions are measured in proton-proton collisions at $\sqrt{s}=13 \text{TeV}$, using a data set corresponding to an integrated luminosity of 2.6/fb collected by the CMS detector at the CERN LHC. Dijet angular distributions are found to be in agreement with the perturbative QCD predictions that include electroweak corrections.

CMS_PAS_FSQ_12_020


Experiment: ()
Status: UNVALIDATED
No authors listed No references listed
Beams: * *
Beam energies: ANY
    No run details listed

CMS_QCD_10_024


Experiment: ()
Status: UNVALIDATED
No authors listed No references listed
Beams: * *
Beam energies: ANY
    No run details listed

D0_1995_I398175

Transverse energy distributions within jets in $p\bar{p}$ collisions at 1800 GeV
Experiment: D0 (Tevatron)
Inspire ID: 398175
Status: VALIDATED
Authors:
  • Simone Amoroso
References: Beams: p- p+
Beam energies: (900.0, 900.0) GeV
Run details:
  • proton-antiproton collisions at a c.o.m. energy of 1.8 TeV

D0 measurement of the jet shape as a function of jet transverse energy in both the central ($|\eta|<0.2$) and forward ($2.5<|\eta|<3.5$) rapidity regions.

D0_1996_S3214044

Topological distributions of inclusive three- and four-jet events
Experiment: D0 (Tevatron Run 1)
Inspire ID: 399364
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p- p+
Beam energies: (900.0, 900.0) GeV
Run details:
  • $p \bar{p} \to$ jets at 1800 GeV with minimum jet pT in analysis = 20 GeV

The global topologies of inclusive three- and four-jet events produced in pbar p interactions are described. The three- and four-jet events are selected from data recorded by the D0 detector at the Fermilab Tevatron Collider operating at a center-of-mass energy of $\sqrt{s}$=1800 GeV. The studies also show that the topological distributions of the different subprocesses involving different numbers of quarks are very similar and reproduce the measured distributions well. The parton-shower Monte Carlo generators provide a less satisfactory description of the topologies of the three- and four-jet events.

D0_1996_S3324664

Azimuthal decorrelation of jets widely separated in rapidity
Experiment: D0 (Tevatron Run 1)
Inspire ID: 416886
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p- p+
Beam energies: (900.0, 900.0) GeV
Run details:
  • $p \bar{p} \to \,\text{jets}$ at 1800\;\text{GeV}

First measurement of the azimuthal decorrelation between jets with pseudorapidity separation up to five units. The data were accumulated using the D0 detector during Tevatron Run 1 at $\sqrt{s} = 1.8\;\text{TeV}$. Requires di-jet events with at least one jet above 50 GeV and two jets above 20 GeV.

D0_2000_I499943

The $b\bar{b}$ production cross-section and angular correlations
Experiment: D0 (Tevatron Run 1)
Inspire ID: 499943
Status: VALIDATED
Authors:
  • Simone Amoroso
References: Beams: p- p+
Beam energies: (900.0, 900.0) GeV
Run details:
  • $p\bar{p}$ dijet events at 1.8\;\text{TeV}, with a minimum \pt of 12\;GeV.

Measurements of the $b\bar{b}$ production cross-section and angular correlations using the D0 detector at the Fermilab Tevatron $p\bar{p}$ collider operating at $\sqrt{s} = 1.8\;\text{TeV}$. The $b$ quark production cross-section and the angular correlations between $b$-quark pairs, for $|y(b)| < 1.0$ and $p_T(b) > 6\;\text{GeV}/c$, are extracted from single muon and dimuon data samples.

D0_2000_I503361

D0 RunI measurement of the Z pT in the electron channel
Experiment: D0 (Tevatron)
Inspire ID: 503361
Status: VALIDATED
Authors:
  • Simone Amoroso
References: Beams: p- p+
Beam energies: (900.0, 900.0) GeV
Run details:
  • $Z\to ee$ event

D0 measurement of the Drell-Yan differential cross section as a function of the transverse momentum in the electron channel. The dielectron invariant mass is required to be between 75 and 105 GeV.

D0_2000_S4480767

Transverse momentum of the W boson
Experiment: D0 (Tevatron Run 1)
Inspire ID: 535017
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p- p+
Beam energies: (900.0, 900.0) GeV
Run details:
  • Production of W+ and W- decaying into the electron channel.

Measurement of the differential cross section for W boson production as a function of its transverse momentum. The data were collected by the D0 experiment at the Fermilab Tevatron Collider during 1994-1995 and correspond to an integrated luminosity of 85 pb$^{-1}$.

D0_2001_S4674421

Tevatron Run I differential W/Z boson cross-section analysis
Experiment: D0 (Tevatron Run 1)
Inspire ID: 559624
Status: VALIDATED
Authors:
  • Lars Sonnenschein
References: Beams: p- p+
Beam energies: (900.0, 900.0) GeV
Run details:
  • $W/Z$ events with decays to first generation leptons, in $p\bar{p}$ collisions at $\sqrt{s} = 1800\;\text{GeV}$

Measurement of differential W/Z boson cross section and ratio in $p \bar{p}$ collisions at center-of-mass energy $\sqrt{s} = 1.8\;\text{TeV}$. The data cover electrons and neutrinos in a pseudorapidity range of -2.5 to 2.5.

D0_2004_S5992206

Run II jet azimuthal decorrelation analysis
Experiment: D0 (Tevatron Run 2)
Inspire ID: 659398
Status: VALIDATED
Authors:
  • Lars Sonnenschein
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • QCD events in ppbar interactions at $\sqrt{s} = 1960$ GeV.

Correlations in the azimuthal angle between the two largest pT jets have been measured using the D0 detector in ppbar collisions at 1960 GeV. The analysis is based on an inclusive dijet event sample in the central rapidity region. The correlations are determined for four different pT intervals.

D0_2006_S6438750

Inclusive isolated photon cross-section, differential in pT(gamma)
Experiment: D0 (Tevatron Run 2)
Inspire ID: 698784
Status: VALIDATED
Authors:
  • Andy Buckley
  • Gavin Hesketh
  • Frank Siegert
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • ppbar collisions at $\sqrt{s} = 1960$ GeV. Requires gamma + jet (q,qbar,g) hard processes, which for Pythia 6 means MSEL=10 for with MSUB indices 14, 18, 29, 114, 115 enabled.

Measurement of differential cross section for inclusive production of isolated photons in p pbar collisions at $\sqrt{s} = 1.96$ TeV with the D\O detector at the Fermilab Tevatron collider. The photons span transverse momenta 23--300 GeV and have pseudorapidity $|\eta| < 0.9$. Isolated direct photons are probes of pQCD via the annihilation ($q \bar{q} -> \gamma g$) and quark-gluon Compton scattering ($q g -> \gamma q$) processes, the latter of which is also sensitive to the gluon PDF. The initial state radiation / resummation formalisms are sensitive to the resulting photon pT spectrum

D0_2007_S7075677

$Z/\gamma^* + X$ cross-section shape, differential in $y(Z)$
Experiment: D0 (Tevatron Run 2)
Inspire ID: 744624
Status: VALIDATED
Authors:
  • Andy Buckley
  • Gavin Hesketh
  • Frank Siegert
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • Drell-Yan $p \bar{p} \to Z/\gamma^*$ + jets events at $\sqrt{s}$ = 1960 GeV. Needs mass cut on lepton pair to avoid photon singularity, looser than $71 < m_{ee} < 111$ GeV

Cross sections as a function of di-electron rapidity $p \bar{p}$ collisions at $\sqrt{s}$ = 1.96 TeV, based on an integrated luminosity of $0.4 \text{fb}^{-1}$.

D0_2008_S6879055

Measurement of the ratio $\sigma(Z/\gamma^* + n \text{ jets})/\sigma(Z/\gamma^*)$
Experiment: D0 (Tevatron Run 2)
Inspire ID: 724239
Status: VALIDATED
Authors:
  • Giulio Lenzi
  • Frank Siegert
References:
  • hep-ex/0608052
Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • $p \bar{p} \to e^+ e^-$ + jets at 1960 GeV. Needs mass cut on lepton pair to avoid photon singularity, looser than $75 < m_{ee} < 105$ GeV.

Cross sections as a function of $p_\perp$ of the three leading jets and $n$-jet cross section ratios in $p \bar{p}$ collisions at $\sqrt{s}$ = 1.96 TeV, based on an integrated luminosity of $0.4 \text{fb}^{-1}$.

D0_2008_S7554427

$Z/\gamma^* + X$ cross-section shape, differential in $pT(Z)$
Experiment: D0 (Tevatron Run 2)
Inspire ID: 769689
Status: VALIDATED
Authors:
  • Andy Buckley
  • Frank Siegert
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • $p \bar{p} \to e^+ e^-$ + jets at 1960 GeV. * Needs mass cut on lepton pair to avoid photon singularity, looser than $40 < m_{ee} < 200$ GeV.

Cross sections as a function of $p_\perp$ of the vector boson inclusive and in forward region ($|y| > 2$, $p_\perp<30$ GeV) in the di-electron channel in $p \bar{p}$ collisions at $\sqrt{s}$ = 1.96 TeV, based on an integrated luminosity of 0.98 fb$^{-1}$.

D0_2008_S7662670

Measurement of D0 Run II differential jet cross sections
Experiment: D0 (Tevatron Run 2)
Inspire ID: 779574
Status: VALIDATED
Authors:
  • Andy Buckley
  • Gavin Hesketh
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • QCD events at $\sqrt{s} = 1960\;\text{GeV}$. A $p_\perp^\text{min} cut is probably necessary since the lowest jet $p_\perp$ bin is at 50\;GeV

Measurement of the inclusive jet cross section in $p \bar{p}$ collisions at center-of-mass energy $\sqrt{s} = 1.96\;\text{TeV}$. The data cover jet transverse momenta from 50--600\;GeV and jet rapidities in the range -2.4 to 2.4.

D0_2008_S7719523

Isolated $\gamma$ + jet cross-sections, differential in pT($\gamma$) for various $y$ bins
Experiment: D0 (Tevatron Run 2)
Inspire ID: 782968
Status: VALIDATED
Authors:
  • Andy Buckley
  • Gavin Hesketh
  • Frank Siegert
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • Produce only gamma + jet ($q,\bar{q},g$) hard processes (for Pythia 6, this means MSEL=10 and MSUB indices 14, 29 & 115 enabled). The lowest bin edge is at 30 GeV, so a kinematic pTmin cut is probably required to fill the histograms.

The process $p \bar{p}$ -> photon + jet + X as studied by the D0 detector at the Fermilab Tevatron collider at center-of-mass energy $\sqrt{s} = 1.96\;\text{TeV}$. Photons are reconstructed in the central rapidity region $|y_\gamma| < 1.0$ with transverse momenta in the range 30--400\;GeV, while jets are reconstructed in either the central $|y_\text{jet}| < 0.8$ or forward $1.5 < |y_\text{jet}| < 2.5$ rapidity intervals with $p_\perp^\text{jet} > 15\;\text{GeV}$. The differential cross section $\mathrm{d}^3 \sigma / \mathrm{d}{p_\perp^\gamma} \mathrm{d}{y_\gamma} \mathrm{d}{y_\text{jet}}$ is measured as a function of $p_\perp^\gamma$ in four regions, differing by the relative orientations of the photon and the jet. MC predictions have trouble with simultaneously describing the measured normalization and $p_\perp^\gamma$ dependence of the cross section in any of the four measured regions.

D0_2008_S7837160

Measurement of W charge asymmetry from D0 Run II
Experiment: D0 (Tevatron Run 2)
Inspire ID: 791230
Status: VALIDATED
Authors:
  • Andy Buckley
  • Gavin Hesketh
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • Event type: W production with decay to $e \, \nu_e$ only * for Pythia 6: MSEL = 12, MDME(206,1) = 1 * Energy: 1.96 TeV

Measurement of the electron charge asymmetry in $p \bar p \to W + X \to e \nu_e + X$ events at a center of mass energy of 1.96 TeV. The asymmetry is measured as a function of the electron transverse momentum and pseudorapidity in the interval (-3.2, 3.2). This data is sensitive to proton parton distribution functions due to the valence asymmetry in the incoming quarks which produce the W. Initial state radiation should also affect the pT distribution.

D0_2008_S7863608

Measurement of differential $Z/\gamma^*$ + jet + $X$ cross sections
Experiment: D0 (Tevatron Run 2)
Inspire ID: 792812
Status: VALIDATED
Authors:
  • Andy Buckley
  • Gavin Hesketh
  • Frank Siegert
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • $p \bar{p} \to \mu^+ \mu^-$ + jets at 1960 GeV. Needs mass cut on lepton pair to avoid photon singularity, looser than $65 < m_{\mu\mu} < 115$ GeV.

Cross sections as a function of pT and rapidity of the boson and pT and rapidity of the leading jet in the di-muon channel in $p \bar{p}$ collisions at $\sqrt{s}$ = 1.96 TeV, based on an integrated luminosity of 1.0 fb$^{-1}$.

D0_2009_S8202443

$Z/\gamma^*$ + jet + $X$ cross sections differential in pT(jet 1,2,3)
Experiment: D0 (Tevatron Run 2)
Inspire ID: 815094
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • $p \bar{p} \to e^+ e^-$ + jets at 1960 GeV. Needs mass cut on lepton pair to avoid photon singularity, looser than $65 < m_{ee} < 115$ GeV.

Cross sections as a function of pT of the three leading jets in $Z/\gamma^{*} (\to e^{+} e^{-})$ + jet + X production in $p \bar{p}$ collisions at $\sqrt{s} = 1.96$ TeV, based on an integrated luminosity of 1.0 fb$^{-1}$.

D0_2009_S8320160

Dijet angular distributions
Experiment: D0 (Tevatron Run 2)
Inspire ID: 824127
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • $p \bar{p} \to$ jets at 1960 GeV

Dijet angular distributions in different bins of dijet mass from 0.25 TeV to above 1.1 TeV in $p \bar{p}$ collisions at $\sqrt{s} = 1.96$ TeV, based on an integrated luminosity of 0.7 fb$^{-1}$.

D0_2009_S8349509

Z+jets angular distributions
Experiment: D0 (Tevatron Run 2)
Inspire ID: 826756
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • $p \bar{p} \to \mu^+ \mu^-$ + jets at 1960 GeV. Needs mass cut on lepton pair to avoid photon singularity, looser than $65 < m_{ee} < 115$ GeV.

First measurements at a hadron collider of differential cross sections for $Z (\to \mu\mu)$+jet+X production in $\Delta\phi(Z, j)$, $|\Delta y(Z, j)|$ and $|y_\mathrm{boost}(Z, j)|$. Vector boson production in association with jets is an excellent probe of QCD and constitutes the main background to many small cross section processes, such as associated Higgs production. These measurements are crucial tests of the predictions of perturbative QCD and current event generators, which have varied success in describing the data. Using these measurements as inputs in tuning event generators will increase the experimental sensitivity to rare signals.

D0_2010_S8566488

Dijet invariant mass
Experiment: D0 (Tevatron Run 2)
Inspire ID: 846483
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • $p \bar{p} \to$ jets at 1960 GeV. Analysis needs two hard jets above 40 GeV.

The inclusive dijet production double differential cross section as a function of the dijet invariant mass and of the largest absolute rapidity ($|y|_\text{max}$) of the two jets with the largest transverse momentum in an event is measured using 0.7 fb$^{-1}$ of data. The measurement is performed in six rapidity regions up to $|y|_\text{max}=2.4$.

D0_2010_S8570965

Direct photon pair production
Experiment: CDF (Tevatron Run 2)
Inspire ID: 846997
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • All processes that can produce prompt photon pairs, e.g. $jj \to jj$, $jj \to j\gamma$ and $jj \to \gamma \gamma$. Non-prompt photons from hadron decays like $\pi$ and $\eta$ have been corrected for.

Direct photon pair production cross sections are measured using 4.2 fb$^{-1}$ of data. They are binned in diphoton mass, the transverse momentum of the diphoton system, the azimuthal angle between the photons, and the polar scattering angle of the photons. Also available are double differential cross sections considering the last three kinematic variables in three diphoton mass bins. Note, the numbers in version 1 of the arXiv preprint were missing the dM normalisation in the double differential cross sections. This has been reported to and fixed by the authors in v2 and the journal submission. HepData as well as the Rivet analysis have also been updated.

D0_2010_S8671338

Measurement of differential $Z/\gamma^*$ pT
Experiment: D0 (Tevatron Run 2)
Inspire ID: 856972
Status: VALIDATED
Authors:
  • Flavia Dias
  • Gavin Hesketh
  • Frank Siegert
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • $p \bar{p} \to \mu^+ \mu^-$ + jets at 1960 GeV. Needs mass cut on lepton pair to avoid photon singularity, looser than $65 < m_{\mu\mu} < 115$ GeV. Restrict $Z/\gamma^*$ mass range to roughly $50 \text{GeV}/c^2 < m_{\mu\mu} < 120 \text{GeV}/c^2$ for efficiency. Weighted events and kinematic sampling enhancement can help to fill the pT tail.

Cross section as a function of pT of the Z boson decaying into muons in $p \bar{p}$ collisions at $\sqrt{s}$ = 1.96 TeV, based on an integrated luminosity of 0.97 fb$^{-1}$.

D0_2010_S8821313

Precise study of Z pT using novel technique
Experiment: D0 (Tevatron Run 2)
Inspire ID: 871787
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • Inclusive $Z/\gamma^*$ production in both electron and muon channels. Cut on invariant lepton mass should be wider than $70 < m_{\ell\ell} < 110$ GeV.

Using 7.3 pb$^{-1}$ the distribution of the variable $\phi^*$ is measured, which probes the same physical effects as the $Z/\gamma^*$ boson transverse momentum, but is less susceptible to the effects of experimental resolution and efficiency. Results are presented for both the di-electron and di-muon channel.

D0_2011_I895662

3-jet invariant mass
Experiment: D0 (Tevatron Run 2)
Inspire ID: 895662
Status: VALIDATED
Authors:
  • Hendrik Hoeth
References:
  • arxiv:1104.1986
Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • QCD events, three jets above 40 GeV.

Inclusive three-jet differential cross-section as a function of invariant mass of the three jets with the largest transverse momenta. The measurement is made in three rapidity regions ($|y|<0.8, 1.6, 2.4$) and with jets above 40, 70, and 100 GeV.

D0_2015_I1324946

D0 measurement of the $\phi^*$ distribution of muon pairs with masses between 30 and 500 GeV in 10.4 fb−1
Experiment: D0 (Tevatron)
Inspire ID: 1324946
Status: VALIDATED
Authors:
  • Simone Amoroso
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • $Z/\gamma^*$ production with decays to muons.

D0 measurement of the distribution of the variable $\phi^*$ for muon pairs with masses between 30 and 500 GeV, using the complete run II data set collected at the Tevatron proton-antiproton collider. This corresponds to an integrated luminosity of 10.4  fb−1 at \sqrt{s}=1.96 TeV. The data are corrected for detector effects and presented in bins of dimuon rapidity and mass.

DELPHI_1991_I301657

Hadronic Z decay charged multiplicity measurement
Experiment: DELPHI (LEP 1)
Inspire ID: 301657
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Z.Phys. C50 (1991) 185-194
Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV)

The charged particle multiplicity distribution of hadronic Z decays, as measured on the peak of the Z resonance using the DELPHI detector at LEP.

DELPHI_1995_S3137023

Strange baryon production in $Z$ hadronic decays at Delphi
Experiment: DELPHI (LEP 1)
Inspire ID: 394716
Status: VALIDATED
Authors:
  • Hendrik Hoeth
References:
  • Z. Phys. C, 67, 543--554 (1995)
Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV)

Measurement of the $\Xi^-$ and $\Sigma^+(1385)/\Sigma^-(1385)$ scaled momentum distributions by DELPHI at LEP 1. The paper also has the production cross-sections of these particles, but that's not implemented in Rivet.

DELPHI_1996_S3430090

Delphi MC tuning on event shapes and identified particles.
Experiment: DELPHI (LEP 1)
Inspire ID: 424112
Status: VALIDATED
Authors:
  • Andy Buckley
  • Hendrik Hoeth
References: Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • $\sqrt{s} = 91.2$ GeV, $e^+ e^- -> Z^0$ production with hadronic decays only

Event shape and charged particle inclusive distributions measured using 750000 decays of Z bosons to hadrons from the DELPHI detector at LEP. This data, combined with identified particle distributions from all LEP experiments, was used for tuning of shower-hadronisation event generators by the original PROFESSOR method. This is a critical analysis for MC event generator tuning of final state radiation and both flavour and kinematic aspects of hadronisation models.

DELPHI_1999_S3960137

Measurement of inclusive $\rho^0$, $f_0(980)$, $f_2(1270)$, $K^{*0}_2(1430)$ and $f'_2(1525)$ production in $Z^0$ decays
Experiment: DELPHI (LEP 1)
Inspire ID: 482816
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Phys.Lett.B449:364-382,1999
Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV)

DELPHI results for the production of $\rho^0$, $f_0(980)$, $f_2(1270)$, $K^{*0}_2(1430)$ and $f'_2(1525)$ in $Z^0$ decays. Only the identified particle spectra for $\rho^0$, $f_0(980)$ and $f_2(1270)$ are implemented.

DELPHI_2000_S4328825

Hadronization properties of $b$ quarks compared to light quarks in $e^+ e^-\to q \bar{q}$ from 183\;GeV to 200\;GeV
Experiment: OPAL (LEP 2)
Inspire ID: 524693
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Phys.Lett.B479:118-128,2000
  • hep-ex/0103022
  • DELPHI 2002-052 CONF 586
Beams: e+ e-
Beam energies: (91.5, 91.5); (94.5, 94.5); (96.0, 96.0); (98.0, 98.0); (100.0, 100.0); (103.0, 103.0) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$\;GeV)

Measurements of the mean charged multiplicities separately for $b\bar b$, $c\bar{c}$ and light quark ($uds$) initiated events in $e^+e^-$ interactions at energies above the $Z^0$ mass. In addition to the energy points in the original paper one additional point at 206;GeV is included from a later preliminary result.

DELPHI_2002_069_CONF_603

Study of the b-quark fragmentation function at LEP 1
Experiment: DELPHI (LEP 1)
Status: OBSOLETE
Authors:
  • Hendrik Hoeth
References:
  • DELPHI note 2002-069-CONF-603 (ICHEP 2002)
Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV)

Measurement of the $b$-quark fragmentation function by DELPHI using 1994 LEP 1 data. The fragmentation function for both weakly decaying and primary $b$-quarks has been determined in a model independent way. Nevertheless the authors trust $f(x_B^\text{weak})$ more than $f(x_B^\text{prim})$. Note --- this analysis is superseded by DELPHI_2011_I890503.

DELPHI_2011_I890503

Study of the b-quark fragmentation function at LEP 1
Experiment: DELPHI (LEP1)
Inspire ID: 890503
Status: VALIDATED
Authors:
  • Holger Schulz
References:
  • 10.1140/epjc/s10052-011-1557-x
Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV)

Measurement of the $b$-quark fragmentation function by DELPHI using 1994 LEP 1 data. The fragmentation function for weakly decaying $b$-quarks has been determined in a model independent way. Note --- this analysis supersedes DELPHI_2002_069_CONF_603.

E735_1998_S3905616

Charged particle multiplicity in $p\bar{p}$ collisions at $\sqrt{s} = 1.8\;\text{TeV}$
Experiment: E735 (Tevatron)
Inspire ID: 480349
Status: VALIDATED
Authors:
  • Holger Schulz
  • Andy Buckley
References:
  • Phys.Lett.B435:453-457,1998
Beams: p- p+
Beam energies: (900.0, 900.0) GeV
Run details:
  • QCD events, diffractive processes need to be switched on in order to fill the low multiplicity regions. The measurement was done in $|\eta| \lesssim 3.25$ and was extrapolated to full phase space. However, the method of extrapolation remains unclear.

A measurement of the charged multiplicity distribution at $\sqrt{s} = 1.8\;\text{TeV}$. The analysis is reproduced to the best of abilities. There is no theory curve in the paper to compare to.

EHS_1988_I265504

Charged-particle production in $K^+ p$, $\pi^+ p$ and $pp$ interactions at $250 \text{GeV}/c$
Experiment: EHS (SPS)
Inspire ID: 265504
Status: VALIDATED
Authors:
  • Felix Riehn
References:
  • Z.Phys.C39 (1988), 311
Beams: p+ p+, 0 p+, 0 p+
Beam energies: (250.0, 0.0); (250.0, 0.0); (250.0, 0.0) GeV
Run details:
  • Inelastic interactions in CM frame, excluding slow protons in the lab. frame with p < 1.2 GeV/$c$

Measurement of charged particle production spectra in longitudinal and transverse momentum as well as rapidity by the EHS/NA22 collaboration at the SPS. Experiment was done with a fixed hydrogen target and beams of $p$, $\pi^+$ and $K^+$ with $250\,\text{GeV}/c$. Measured spectra are for positively charged hadrons $C^+$ and negative charge pions $\pi^-$. $C^+$ excludes slow protons with $p < 1.2\,\text{GeV}/c$ in the laboratory. Final spectra are in center-of-mass variables: $x_\mathrm{F}$, $y$ and $p_\mathrm{T}$.

EXAMPLE

A demo to show aspects of writing a Rivet analysis
Experiment: ()
Status: EXAMPLE
Authors:
  • Andy Buckley
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • All event types will be accepted.

This analysis is a demonstration of the Rivet analysis structure and functionality: booking histograms; the initialisation, analysis and finalisation phases; and a simple loop over event particles. It has no physical meaning, but can be used as a simple pedagogical template for writing real analyses.

EXAMPLE_CUTS

A demo to show the new cut system in Rivet analyses
Experiment: ()
Status: EXAMPLE
Authors:
  • David Grellscheid
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • All event types will be accepted.

This analysis is a demonstration of the Rivet cut system and functionality.

EXAMPLE_SMEAR

A demo of how to use Rivet's detector effects features
Experiment: ()
Status: EXAMPLE
Authors:
  • Andy Buckley
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • All event types will be accepted.

A demonstration of how to register and use the particle and jet smearing & efficiency function machinery in Rivet 2.5.0 and later, including how to use C++11 lambda functions.

H1_1994_S2919893

H1 energy flow and charged particle spectra in DIS
Experiment: H1 (HERA)
Inspire ID: 372350
Status: VALIDATED
Authors:
  • Peter Richardson
References: Beams: p+ e-, p+ e+
Beam energies: (820.0, 26.7) GeV
Run details:
  • $e^- p$ / $e^+ p$ deep inelastic scattering, 820 GeV protons colliding with 26.7 GeV electrons

Global properties of the hadronic final state in deep inelastic scattering events at HERA are investigated. The data are corrected for detector effects. Energy flows in both the laboratory frame and the hadronic centre of mass system, and energy-energy correlations in the laboratory frame are presented. Historically, the Ariadne colour dipole model provided the only satisfactory description of this data, hence making it a useful 'target' analysis for MC shower models.

H1_1995_S3167097

Transverse energy and forward jet production in the low-$x$ regime at H1
Experiment: H1 (HERA Run I)
Inspire ID: 396365
Status: UNVALIDATED
Authors:
  • Leif Lonnblad
References:
  • Phys.Lett.B356:118,1995
  • hep-ex/9506012
Beams: p+ e-
Beam energies: (820.0, 26.7) GeV
Run details:
  • 820 GeV protons colliding with 26.7 GeV electrons. DIS events with an outgoing electron energy $> 12 \text{GeV}$. $5 \text{GeV}^2 < Q^2 < 100 \text{GeV}^2$, $10^{-4} < x < 10^{-2}$.

DIS events at low $x$ may be sensitive to new QCD dynamics such as BFKL or CCFM radiation. In particular, BFKL is expected to produce more radiation at high transverse energy in the rapidity span between the proton remnant and the struck quark jet. Performing a transverse energy sum in bins of $x$ and $\eta$ may distinguish between DGLAP and BFKL evolution.

H1_2000_S4129130

H1 energy flow in DIS
Experiment: H1 (HERA)
Inspire ID: 503947
Status: VALIDATED
Authors:
  • Peter Richardson
References: Beams: p+ e+
Beam energies: (820.0, 27.5) GeV
Run details:
  • $e^+ p$ deep inelastic scattering with $p$ at 820\;GeV, $e^+$ at 27.5 GeV \to $\sqrt{s} = 300\;\text{GeV}$

Measurements of transverse energy flow for neutral current deep- inelastic scattering events produced in positron-proton collisions at HERA. The kinematic range covers squared momentum transfers $Q^2$ from 3.2 to 2200 GeV$^2$; the Bjorken scaling variable $x$ from $8 \times 10^{-5}$ to 0.11 and the hadronic mass $W$ from 66 to 233 GeV. The transverse energy flow is measured in the hadronic centre of mass frame and is studied as a function of $Q^2$, $x$, $W$ and pseudorapidity. The behaviour of the mean transverse energy in the central pseudorapidity region and an interval corresponding to the photon fragmentation region are analysed as a function of $Q^2$ and $W$. This analysis is useful for exploring the effect of photon PDFs and for tuning models of parton evolution and treatment of fragmentation and the proton remnant in DIS.

HRS_1986_I18502

Charged Hadron multiplicity at 29 GeV
Experiment: HRS (PEP)
Inspire ID: 18502
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Phys.Rev. D34 (1986) 3304
Beams: e+ e-
Beam energies: (14.5, 14.5) GeV
Run details:
  • Hadronic e+e- events at $\sqrt{s} = 29.$ GeV

The charged particle multiplicity distribution of hadronic $e^+e^-$ events, as measured at $\sqrt{s} = 29.$ GeV using the HRS detector at PEP.

JADE_1983_I190818

Hadronic charged multiplicity measurement between 12 and 35 GeV
Experiment: JADE (PETRA)
Inspire ID: 190818
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Z.Phys. C20 (1983) 187
Beams: e+ e-
Beam energies: (6.0, 6.0); (15.0, 15.0); (17.5, 17.5) GeV
Run details:
  • Hadronic e+ e- events generated below the Z pole

The charged particle multiplicity distribution of hadronic $e^+e^-$ events as measured between 12 and 35 GeV using the JADE detector at PETRA.

JADE_1998_S3612880

Event shapes for 22, 35 and 44 GeV
Experiment: JADE (PETRA)
Inspire ID: 447560
Status: VALIDATED
Authors:
  • Holger Schulz
References: Beams: e- e+
Beam energies: (11.0, 11.0); (17.5, 17.5); (22.0, 22.0) GeV
Run details:
  • Z->hadronic final states, bbar contributions have been corrected for as well as ISR

Thrust, Jet Mass and Broadenings, Y23 for 35 and 44 GeV and only Y23 at 22 GeV.

JADE_OPAL_2000_S4300807

Jet rates in $e^+e^-$ at JADE [35--44 GeV] and OPAL [91--189 GeV].
Experiment: JADE_OPAL (PETRA and LEP)
Inspire ID: 513337
Status: VALIDATED
Authors:
  • Frank Siegert
  • Andy Buckley
References: Beams: e+ e-
Beam energies: (17.5, 17.5); (22.0, 22.0); (45.6, 45.6); (66.5, 66.5); (80.5, 80.5); (86.0, 86.0); (91.5, 91.5); (94.5, 94.5) GeV
Run details:
  • $e^+ e^- \to$ jet jet (+ jets)

Differential and integrated jet rates for Durham and JADE jet algorithms. The integration cut value used for the integrated rate observables is not well-defined in the paper: the midpoint of the differential bin has been used thanks to information from Stefan Kluth and Christoph Pahl. We anyway recommend that the differential plots be preferred over the integrated ones for MC generator validation and tuning, to minimise correlations.

L3_1992_I336180

Measurement of inclusive eta production in hadronic decays of the Z0
Experiment: L3 (LEP)
Inspire ID: 336180
Status: VALIDATED
Authors:
  • Simone Amoroso
References: Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • electron positron collisions at the Z0 peak, with hadronic decays.

L3 measurement of the inclusive momentum distribution of the eta meson in hadronic decays of the Z0 normalized to the total hadronic cross-section.

L3_2004_I652683

Jet rates and event shapes at LEP I+II
Experiment: L3 (LEP I+II)
Inspire ID: 652683
Status: VALIDATED
Authors:
  • Adil Jueid
References:
  • Phys.Rept. 399 (2004) 71-174
  • 10.1016/j.physrep.2004.07.002
  • http://arxiv.org/abs/hep-ex/0406049
Beams: e+ e-
Beam energies: (20.7, 20.7); (27.6, 27.6); (32.7, 32.7); (37.9, 37.9); (41.1, 41.1); (42.5, 42.5); (45.6, 45.6); (65.0, 65.0); (68.0, 68.0); (80.7, 80.7); (86.2, 86.2); (91.4, 91.4); (94.3, 94.3); (97.2, 97.2); (100.1, 100.1); (103.1, 103.1) GeV
Run details:
  • $e^+ e^- \to q \bar{q}$

Event shapes, charged particle multiplicity and scaled momentum distribution at the Z-boson peak.

LHCB_2010_I867355

Measurement of $\sigma(pp \to b \bar{b} X$ at $\sqrt{s} = 7$ TeV in the forward region
Experiment: LHCb (LHC)
Inspire ID: 867355
Status: VALIDATED
Authors:
  • Andy Buckley
  • Sercan Sen
  • Peter Skands
  • Sheldon Stone
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • $pp$ to $b$-hadron + $X$ at 7 TeV. i.e., switch on "HardQCD:gg2bbbar" and "HardQCD:qqbar2bbbar" flags in Pythia8.

The average cross-section to produce $b$-flavoured or $\bar{b}$-flavoured hadrons is measured in different pseudorapidity intervals over the entire range of p_\perp, assuming the LEP (and Tevatron) fractions for fragmentation into $b$-flavoured hadrons.

LHCB_2010_S8758301

LHCb differential cross section measurement of prompt $K^0_S$ production in three rapidity windows at $\sqrt{s} = 0.9$ TeV
Experiment: LHCB (LHC 900 GeV)
Inspire ID: 865584
Status: VALIDATED
Authors:
  • Holger Schulz
  • Alex Grecu
References: Beams: p+ p+
Beam energies: (450.0, 450.0) GeV
Run details:
  • QCD events. See paper for MC discussion.

The paper presents the cross-section and double differential cross-section measurement for prompt $K^0_S$ production in pp collisions at $\sqrt{s} = 0.9\;TeV$. The data were taken during the LHCb run in December 2009 and cover a transversal momentum range from 0 to 1.6 GeV/c. The differential production cross-section is calculated for three rapidity windows $2.5 < y < 3.0$, $3.0 < y < 3.5$ and $3.5 < y < 4.0$ as well as the whole rapidity domain $2.5 < y < 4.0$.

LHCB_2011_I917009

$V^0$ production ratios in $pp$ collisions at $\sqrt{s}= 0.9$ and 7 TeV at LHCb
Experiment: LHCb (LHC)
Inspire ID: 917009
Status: VALIDATED
Authors:
  • Alex Grecu
References: Beams: p+ p+
Beam energies: (450.0, 450.0); (3500.0, 3500.0) GeV
Run details:
  • QCD events. LHCb minimum bias, Perugia 0 and Perugia NOCR tune events used for reproducing published histograms.

This paper presents the production ratios for $\bar{\Lambda}/\Lambda$ and $\bar{\Lambda}/K_{s}^{0}$ measured by LHCb detector in 2010 at $\sqrt{s} = 0.9$ TeV and 7 TeV as functions of the transverse momentum $p_\perp$ and the rapidity $y$ in the ranges $0.15 < p_\perp < 2.50\;\text{GeV}/c$ and $2.0 < y < 4.5$, respectively. The results for the two energies are merged and represented as a function of rapidity loss $\Delta y = y_{\mathrm{beam}} - y$.

LHCB_2011_I919315

Inclusive differential $\Phi$ production cross-section as a function of $p_\text{T}$ and $y$
Experiment: LHCB (LHC)
Inspire ID: 919315
Status: VALIDATED
Authors:
  • Friederike Blatt
  • Michael Kaballo
  • Till Moritz Karbach
References:
  • Phys.Lett.B703:267-273,2011
  • arXiv: 1107.3935
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • $pp$ collisions, QCD-Events, $\sqrt{s}=7$TeV

Measurement of the inclusive differential $\Phi$ cross-section in $pp$ collisions at $\sqrt {s}=7$TeV in the rapidity range of $ 2.44 < y < 4.06$ and the $p_\text{T}$ range of 0.6 GeV/c $< p_\text{T} <$ 5.0 GeV/c.

LHCB_2012_I1119400

Measurement of prompt hadron production ratios in $pp$ collisions at $\sqrt{s} = 0.9$ and 7 TeV
Experiment: LHCb (LHC)
Inspire ID: 1119400
Status: VALIDATED
Authors:
  • Andrea Contu
  • Alex Grecu
References: Beams: p+ p+
Beam energies: (450.0, 450.0); (3500.0, 3500.0) GeV
Run details:
  • Minimum bias events at $\sqrt{s} = 0.9$ and 7 TeV.

WARNING --- particle map is incomplete for determination of promptness, assume unknown particles to have a life time of 0 --- Measurement of the production ratios of prompt charged particles (protons, pions and kaons). Promptness is defined as originating from the primary interaction, either directly, or through the subsequent decay of a resonance.

LHCB_2012_I1208102

Differential cross-sections of $\mathrm{Z}/\gamma^* \to e^{+}e^{-}$ vs rapidity and $\phi^*$
Experiment: LHCb (LHC)
Inspire ID: 1208102
Status: VALIDATED
Authors:
  • Ana Elena Dumitriu
  • Marek Sirendi
  • David Ward
  • Alex Grecu
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • $\mathrm{Z}/\gamma^* \to e^{+}e^{-}_$ decays with di-lepton invariant mass $> 40$ GeV/$c^2$ produced in $pp$ collisions at $\sqrt{s}=7$ TeV.

Measurement of the $pp \to \mathrm{Z}^0$ cross-section in the $\mathrm{Z}/\gamma \to e^{+}e^{-}$ mode at $\sqrt{s} = 7$ TeV. Daughter electrons are required to have $p_T > 20$ GeV/$c$, $2 < \eta < 4.5$ and the dielectron invariant mass in range 60-120 GeV/$c^2$. The cross-section is given as a function of $Z$ rapidity and an angular variable ($\phi^*$) closely related to $Z$ transverse momentum (derived from the lepton pseudorapidity and azimuthal angle differences). For event generators implementing cross-section QCD corrections only at LO the distributions are normalized to the cross-section measured in data $76.0 \pm 0.8 \pm 2.0 \pm 2.6 \pm 0.4$ pb, where the first uncertainty is statistical, the second is systematic, the third is due to luminosity uncertainty and the fourth to FSR corrections.

LHCB_2013_I1208105

LHCb measurement of energy flow from $pp$ collisions at $\sqrt{s} = 7$ TeV
Experiment: LHCb (LHC)
Inspire ID: 1208105
Status: VALIDATED
Authors:
  • Alex Grecu
  • Dmytro Volyanskyy
  • Michael Schmelling
References:
  • arXiv: 1212.4755
  • Eur. Phys. J. C 73 (2012) 2421
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Minimum bias events from $pp$ collisions at sqrt(s) = 7 TeV.

The energy flow created in $pp$ collisions at 7 TeV within the fiducial pseudorapidity range of the LHCb detector ($1.9 < \eta < 4.9$) is measured for inclusive minimum bias interactions, hard scattering processes and events with enhanced or suppressed diffractive contribution. Plots for these four event classes are shown separately for all and charged only final state particles, respectively. The total energy flow is measured by combining the charged energy flow and a data-constrained MC estimate of the neutral component. For the two highest eta bins the data-constrained measurements of the neutral energy were extrapolated from the more central region as the LHCb electromagnetic calorimeter has no detection coverage in that phase space domain.

LHCB_2013_I1218996

Charm hadron differential cross-sections in p_\perp and rapidity
Experiment: LHCB (LHC 7TeV)
Inspire ID: 1218996
Status: VALIDATED
Authors:
  • Patrick Spradlin
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Minimum bias QCD events, proton--proton interactions at $\sqrt{s} = 7$ TeV.

Measurements of differential production cross-sections with respect to transverse momentum, $d \sigma(H_c + \mathrm{c.c.}) / d p_T$, for charm hadron species $H_c \in \{ D^0, D^+, D^\ast(2010)^+, D_s^+, \Lambda_c^+ \}$ in proton--proton collisions at center-of-mass energy $\sqrt{s}= 7$ TeV. The differential cross-sections are measured in bins of hadron transverse momentum ($p_T$) and rapidity ($y$) with respect to the beam axis in the region $0 < p_T < 8$ GeV/$c$ and $2.0 < y < 4.5$, where $p_T$ and $y$ are measured in the proton--proton CM frame. In this analysis code, it is assumed that the event coordinate system is in the proton--proton CM frame with the $z$-axis corresponding to the proton--proton collision axis (as usual). Contributions of charm hadrons from the decays of $b$-hadrons and other particles with comparably large mean lifetimes have been removed in the measurement. In this analysis code, this is implemented by counting only charm hadrons that do not have an ancestor that contains a $b$ quark.

LHCB_2014_I1262703

Study of forward Z + jet production in $pp$ collisions at $\sqrt{s}=7$ TeV in the LHCb fiducial phase-space
Experiment: LHCb (LHC)
Inspire ID: 1262703
Status: VALIDATED
Authors:
  • William Barter
  • Albert Bursche
  • Marek Sirendi
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • $pp$ $Z +$ jet events at 7 TeV with direct $\mu$ decays

A study of forward $Z +$ jet production in $pp$ collisions at $\sqrt{s}=7$ TeV is presented. Results are shown for two jet thresholds of $p_T>10$ GeV and $p_T>20$ GeV. Total cross-sections and six differential cross-sections are measured.

LHCB_2014_I1281685

Charged particle multiplicities and densities in $pp$ collisions at $\sqrt{s} = 7$ TeV
Experiment: LHCB (LHC)
Inspire ID: 1281685
Status: VALIDATED
Authors:
  • Marco Meissner
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Proton-proton collisions at $\sqrt(s)=7$ TeV, minimum bias data with a fixed interaction rate of 1, no pile-up events. Kinematic cuts are, minimum momentum of 2 GeV/$c$, minimum transverse momentum of 0.2 GeV/$c$ and a pseudorapidity range of $2.0 < \eta < 4.8$.

Measurement of prompt charged particle production in proton-proton collsions at a centre-of-mass energy of 7 TeV at the LHC. The measurement is performed in the kinematic range $p > 2$ GeV/$c$, $p_\perp > 0.2$ GeV/$c$ and $2.0 < \eta < 4.8$. At least one prompt charged particle per event is required. A prompt particle is defined as a particle, that either originates directly from the primary vertex or from a decay chain in which the sum of mean lifetimes does not exceed 10 ps. Charged particle multiplicities are measured in the full kinematic range as well as in regions of pseudorapidity and transverse momentum. In addition, also mean particle densities are presented as functions of pseudorapidity and transverse momentum.

LHCB_2015_I1333223

Measurement of inelastic interaction cross-section in pp collisions at 7 TeV for LHCb fiducial phase-space.
Experiment: LHCB (Large Hadron Collider (LHC))
Inspire ID: 1333223
Status: VALIDATED
Authors:
  • Alex Grecu
References: Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Proton-proton interactions at sqrt(s) = 7 TeV. LHCb minimum bias, inelastic events (elastic processes may be turned off).

LhCb measurement of the cross-section for inelastic proton-proton collisions at $\sqrt{s} = 7$ TeV with at least one prompt stable charged particle of transverse momentum $p_T > 0.2$ GeV/$c$ and pseudorapidity ($\eta$) in the range $2.0 < \eta < 4.5$. A prompt stable charged particle is defined as having the true impact parameter relative to the true primary vertex smaller than 200 $\mu$m.

LHCF_2012_I1115479

Measurement of forward neutral pion transverse momentum spectra for $\sqrt{s}$ = 7 TeV proton-proton collisions at LHC
Experiment: LHCF (LHC)
Inspire ID: 1115479
Status: VALIDATED
Authors:
  • Sercan Sen
References:
  • Phys.Rev. D86 (2012) 092001
  • arXiv: 1205.4578
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Inelastic events (ND+SD+DD) at $\sqrt{s}$ = 7 TeV.

The inclusive production rate of neutral pions has been measured by LHCf experiment during $\sqrt{s}=7$ TeV pp collision operation in early 2010. In order to ensure good event reconstruction efficiency, the range of the $\pi^0$ rapidity and $p_\perp$ are limited to $8.9 < y < 11.0$ and $p_\perp < 0.6$ GeV, respectively.

MC_DIPHOTON

Monte Carlo validation observables for diphoton production at LHC
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • LHC pp -> jet+jet, photon+jet, photon+photon, all with EW+QCD shower

Different observables related to the two photons

MC_ELECTRONS

Monte Carlo validation observables for electron production
Experiment: ()
Status: VALIDATED
Authors:
  • Andy Buckey
No references listed
Beams: * *
Beam energies: ANY
    No run details listed

Any electrons with $p_\perp > 0.5$ GeV are found and projected onto many different observables. There is currently no photon clustering on to these electrons. Multiplicities are tracked for both inclusive and prompt-only particles -- maybe a MC_PROMPTELECTRONS analysis is needed?

MC_GENERIC

Generic MC testing analysis
Experiment: ()
Status: VALIDATED
Authors:
  • Ian Bruce
  • Andy Buckley
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • Any!

Generic analysis of typical event distributions such as $\eta$, $y$, $pT$, $\phi$\dots

MC_HFJETS

Monte Carlo validation analysis to study heavy flavour production
Experiment: ()
Status: VALIDATED
Authors:
  • Andy Buckley
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • Run any events which will produce jets above 20 GeV. Of most interest for processes where c and b hadrons can be produced (either hard or soft) of course!

Plots to study fragmentation of heavy flavour hadrons in jets.

MC_HHJETS

Monte Carlo validation observables for $HH$ (stable) + jets production
Experiment: ()
Status: VALIDATED
Authors:
  • Andreas Papaefstathiou
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $HH$ production with stable Higgses

The available observables are the Higgs boson pair invariant mass, the separation between the two Higgs bosons, pT of the di-Higgs (any, hardest, second hardest), pT and pseudorapidity of Higgs bosons (any, hardest, second hardest), pT of jets 1--4, jet multiplicity, $\Delta\eta(h, \text{jet1})$, $\Delta R(\text{jet2}, \text{jet3})$, differential jet rates 0->1, 1->2, 2->3, 3->4, and integrated 0--4 jet rates.

MC_HINC

Monte Carlo validation observables for $h[\tau^+ \, \tau^-]$ production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $h [\to \tau^+ \tau^-]$.

Monte Carlo validation observables for $h[\tau^+ \, \tau^-]$ production

MC_HJETS

Monte Carlo validation observables for $h[\tau^+ \, \tau^-]$ + jets production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $h [\to \tau^+ \tau^-]$ + jets.

The available observables are the Higgs mass, pT of jets 1--4, jet multiplicity, $\Delta\eta(h, \text{jet1})$, $\Delta R(\text{jet2}, \text{jet3})$, differential jet rates 0->1, 1->2, 2->3, 3->4, and integrated 0--4 jet rates.

MC_HKTSPLITTINGS

Monte Carlo validation observables for $h[\tau^+ \, \tau^-]$ + jets production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $h [\to \tau^+ \tau^-]$ + jets.

Monte Carlo validation observables for $h[\tau^+ \, \tau^-]$ + jets production

MC_IDENTIFIED

MC testing analysis for identified particle distributions
Experiment: ()
Status: VALIDATED
Authors:
  • Andy Buckley
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • Any!

Plotting of distributions of PID codes (all/stable/unstable) and ID-specific distributions such as the $|\eta|$ of $K$, $\pi$ and $\Lambda$ mesons.

MC_JETS

Monte Carlo validation observables for jet production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • Pure QCD jet production events at an arbitrary collider.

Jets with $p_\perp>20$ GeV are constructed with an anti-$k_\perp$ jet finder with $R=0.4$ and projected onto many different observables.

MC_JETTAGS

Monte Carlo validation analysis for ideal heavy flavour tagging observables
Experiment: ()
Status: VALIDATED
Authors:
  • Andy Buckley
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • Run any events which will produce jets above 20 GeV. Of most interest for processes where c and b hadrons can be produced (either hard or soft) of course!

Plots to study theoretical tagging of heavy flavour hadrons in jets.

MC_LEADJETUE

Underlying event in leading jet events, extended to LHC
Experiment: ()
Status: VALIDATED
Authors:
  • Andy Buckley
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • LHC pp QCD interactions at 0.9, 10 or 14 TeV. Particles with $c \tau > 10$ mm should be set stable. Several $p_\perp^\text{min}$ cutoffs are probably required to fill the profile histograms.

Rick Field's measurement of the underlying event in leading jet events, extended to the LHC. As usual, the leading jet of the defines an azimuthal toward/transverse/away decomposition, in this case the event is accepted within $|\eta| < 2$, as in the CDF 2008 version of the analysis. Since this isn't the Tevatron, I've chosen to use $k_\perp$ rather than midpoint jets.

MC_MET

Monte Carlo validation observables for missing transverse energy
Experiment: ()
Status: VALIDATED
Authors:
  • Andy Buckley
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • Any event type, with or without "real MET".

Reports vector and scalar transverse momentum sums, based on total or $|\eta| < 5$ detector acceptances.

MC_MUONS

Monte Carlo validation observables for muon production
Experiment: ()
Status: VALIDATED
Authors:
  • Andy Buckey
No references listed
Beams: * *
Beam energies: ANY
    No run details listed

Any muons with $p_\perp > 0.5$ GeV are found and projected onto many different observables. There is currently no photon clustering on to these muons. Multiplicities are tracked for both inclusive and prompt-only particles -- maybe a MC_PROMPTMUONS analysis is needed?

MC_PDFS

Analysis to study PDF sampling in any MC run
Experiment: ()
Status: VALIDATED
Authors:
  • Andy Buckley
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • Any!

Plotting of PDF sampling info, such as the $Q^2$ and both $x$ values of the sampling (aggregated and distinguished as max/min, and some correlations with event properties.

MC_PHOTONINC

Monte Carlo validation observables for single isolated photon production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • Tevatron Run II ppbar -> gamma + jets.

Monte Carlo validation observables for single isolated photon production

MC_PHOTONJETS

Monte Carlo validation observables for photon + jets production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • Tevatron Run II ppbar -> gamma + jets.

Different observables related to the photon and extra jets.

MC_PHOTONKTSPLITTINGS

Monte Carlo validation observables for photon + jets production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • Tevatron Run II ppbar -> gamma + jets.

Monte Carlo validation observables for photon + jets production

MC_PHOTONS

Monte Carlo validation observables for general photons
Experiment: ()
Status: VALIDATED
Authors:
  • Steve Lloyd
  • Andy Buckley
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • Any event type, but there are many observables for photons associated to (semi-)hard leptons.

Observables for testing general unisolated photon properties, especially those associated with charged leptons (e and mu).

MC_PRINTEVENT

Print out a dump of each event to standard output
Experiment: ()
Status: VALIDATED
Authors:
  • Andy Buckley
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • Can be used with any event type.

Print out a dump of the event structure to the terminal standard output, in a conveniently human readable form with e.g. particle names in addition to the usual numerical ID codes.

MC_QCD_PARTONS

Generic parton-level Monte Carlo validation analysis for <X> + jets.
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • Any <X> + jets.

Only partons (excluding top quarks) are taken into account to construct a kt cluster sequence. Thus this analysis can be used as a generic validation tool for QCD activity.

MC_SUSY

Validate generic SUSY events, including various lepton invariant mass
Experiment: ()
Status: VALIDATED
Authors:
  • Andy Buckley
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • SUSY events at any energy. $p_\perp$ cutoff at 10 GeV may be advised.

Analysis of generic SUSY events at the LHC, based on Atlas Herwig++ validation analysis contents. Plotted are $\eta$, $\phi$ and $p_\perp$ observables for charged tracks, photons, isolated photons, electrons, muons, and jets, as well as various dilepton mass `edge' plots for different event selection criteria.

MC_TTBAR

MC analysis for ttbar studies
Experiment: ()
Status: VALIDATED
Authors:
  • Hendrik Hoeth
  • Andy Buckley
  • Dave Mallows
  • Michal Kawalec
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • For Pythia6, set MSEL=6 and fix $W^+$ and $W^-$ decays to semi-leptonic modes via the MDME array. * For Fortran Herwig/Jimmy select IPROC=1706.

This is a pure Monte Carlo study for semi-leptonic $t\bar{t}$ production.

MC_VH2BB

MC unboosted VH2bb validation plots
Experiment: (LHC)
Status: VALIDATED
Authors:
  • Ben Smart
  • Andy Buckley
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $VH$ with $H \to b \bar{b}$ and the vector boson decaying to electron or muon channels.

Various plots for characterising the process $V H \to b\bar{b}$

MC_WINC

Monte Carlo validation observables for inclusive $W[e \, \nu]$ production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $e \, \nu$ + jets analysis.

Monte Carlo validation observables for inclusive $W[e \, \nu]$ production

MC_WINC_EL

Monte Carlo validation observables for inclusive $W[e \, \nu]$ production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
  • Gavin Hesketh
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $e \, \nu$ + jets analysis.

Monte Carlo validation observables for inclusive $W[e \, \nu]$ production

MC_WINC_EL_BARE

Monte Carlo validation observables for inclusive $W[e \, \nu]$ production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
  • Gavin Hesketh
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $e \, \nu$ + jets analysis.

Monte Carlo validation observables for inclusive $W[e \, \nu]$ production, with bare leptons.

MC_WINC_MU

Monte Carlo validation observables for inclusive $W[mu \, \nu]$ production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
  • Gavin Hesketh
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $mu \, \nu$ + jets analysis.

Monte Carlo validation observables for inclusive $W[mu \, \nu]$ production

MC_WINC_MU_BARE

Monte Carlo validation observables for inclusive $W[mu \, \nu]$ production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
  • Gavin Hesketh
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $mu \, \nu$ + jets analysis.

Monte Carlo validation observables for inclusive $W[mu \, \nu]$ production, with bare leptons.

MC_WJETS

Monte Carlo validation observables for $W[e \, \nu]$ + jets production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $e \, \nu$ + jets analysis.

Monte Carlo validation observables for $W[e \, \nu]$ + jets production

MC_WJETS_EL

Monte Carlo validation observables for $W[e \, \nu]$ + jets production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
  • Gavin Hesketh
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $e \, \nu$ + jets analysis.

Monte Carlo validation observables for $W[e \, \nu]$ + jets production

MC_WJETS_EL_BARE

Monte Carlo validation observables for $W[e \, \nu]$ + jets production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
  • Gavin Hesketh
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $e \, \nu$ + jets analysis.

Monte Carlo validation observables for $W[e \, \nu]$ + jets production, with bare leptons.

MC_WJETS_MU

Monte Carlo validation observables for $W[mu \, \nu]$ + jets production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
  • Gavin Hesketh
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $mu \, \nu$ + jets analysis.

Monte Carlo validation observables for $W[mu \, \nu]$ + jets production

MC_WJETS_MU_BARE

Monte Carlo validation observables for $W[mu \, \nu]$ + jets production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
  • Gavin Hesketh
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $mu \, \nu$ + jets analysis.

Monte Carlo validation observables for $W[mu \, \nu]$ + jets production, with bare leptons

MC_WKTSPLITTINGS

Monte Carlo validation observables for $k_\perp$ splitting scales in $W[e \, \nu]$ + jets events
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $e \, \nu$ + jets analysis.

Monte Carlo validation observables for $k_\perp$ splitting scales in $W[e \, \nu]$ + jets events

MC_WPOL

Monte Carlo validation observables for $W$ polarisation
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $W \to e \, \nu$ + jets.

Observables sensitive to the polarisation of the W boson: A0, ... A7, fR, fL, f0, separately for W+ and W-.

MC_WWINC

Monte Carlo validation observables for $W^+[e^+ \, \nu]W^-[\mu^- \, \nu]$ production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $WW$ analysis.

Monte Carlo validation observables for $W^+[e^+ \, \nu]W^-[\mu^- \, \nu]$ production

MC_WWJETS

Monte Carlo validation observables for $W^+[e^+ \, \nu]W^-[\mu^- \, \nu]$ + jets production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $WW$ + jets analysis.

In addition to the typical jet observables this analysis contains observables related to properties of the WW-pair momentum, correlations between the WW, properties of the W bosons, properties of the leptons, correlations between the opposite charge leptons and correlations with jets.

MC_WWKTSPLITTINGS

Monte Carlo validation observables for $W^+[e^+ \, \nu]W^-[\mu^- \, \nu]$ + jets production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $WW$ + jets analysis.

Monte Carlo validation observables for $W^+[e^+ \, \nu]W^-[\mu^- \, \nu]$ + jets production

MC_XS

MC analysis for process total cross section
Experiment: ()
Status: VALIDATED
Authors:
  • Marek Schoenherr
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • Suitable for any process.

Analysis for bookkeeping of the total cross section, number of generated events and the ratio of events with positive and negative weights.

MC_ZINC

Monte Carlo validation observables for $Z[e^+ \, e^-]$ production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $e^+ e^-$ analysis. Needs mass cut on lepton pair to avoid photon singularity, e.g. a min range of $66 < m_{ee} < 116$ GeV

Monte Carlo validation observables for $Z[e^+ \, e^-]$ production

MC_ZINC_EL

Monte Carlo validation observables for $Z[e^+ \, e^-]$ production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
  • Gavin Hesketh
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $e^+ e^-$ analysis. Needs mass cut on lepton pair to avoid photon singularity, e.g. a min range of $66 < m_{ee} < 116$ GeV

Monte Carlo validation observables for $Z[e^+ \, e^-]$ production

MC_ZINC_EL_BARE

Monte Carlo validation observables for $Z[e^+ \, e^-]$ production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
  • Gavin Hesketh
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $e^+ e^-$ analysis. Needs mass cut on lepton pair to avoid photon singularity, e.g. a min range of $66 < m_{ee} < 116$ GeV

Monte Carlo validation observables for $Z[e^+ \, e^-]$ production, with bare leptons.

MC_ZINC_MU

Monte Carlo validation observables for $Z[mu^+ \, mu^-]$ production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
  • Gavin Hesketh
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $mu^+ mu^-$ analysis. Needs mass cut on lepton pair to avoid photon singularity, e.g. a min range of $66 < m_{mumu} < 116$ GeV

Monte Carlo validation observables for $Z[mu^+ \, mu^-]$ production

MC_ZINC_MU_BARE

Monte Carlo validation observables for $Z[mu^+ \, mu^-]$ production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
  • Gavin Hesketh
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $mu^+ mu^-$ analysis. Needs mass cut on lepton pair to avoid photon singularity, e.g. a min range of $66 < m_{mumu} < 116$ GeV

Monte Carlo validation observables for $Z[mu^+ \, mu^-]$ production, with bare leptons.

MC_ZJETS

Monte Carlo validation observables for $Z[e^+ \, e^-]$ + jets production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $e^+ e^-$ + jets analysis. Needs mass cut on lepton pair to avoid photon singularity, e.g. a min range of $66 < m_{ee} < 116$ GeV

Available observables are the pT of jets 1-4, jet multiplicity, $\Delta\eta(Z, \text{jet1})$, $\Delta R(\text{jet2}, \text{jet3})$, differential jet rates 0->1, 1->2, 2->3, 3->4, and integrated 0--4 jet rates.

MC_ZJETS_EL

Monte Carlo validation observables for $Z[e^+ \, e^-]$ + jets production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
  • Gavin Hesketh
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $e^+ e^-$ + jets analysis. Needs mass cut on lepton pair to avoid photon singularity, e.g. a min range of $66 < m_{ee} < 116$ GeV

Available observables are the pT of jets 1-4, jet multiplicity, $\Delta\eta(Z, \text{jet1})$, $\Delta R(\text{jet2}, \text{jet3})$, differential jet rates 0->1, 1->2, 2->3, 3->4, and integrated 0--4 jet rates.

MC_ZJETS_EL_BARE

Monte Carlo validation observables for $Z[e^+ \, e^-]$ + jets production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
  • Gavin Hesketh
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $e^+ e^-$ + jets analysis. Needs mass cut on lepton pair to avoid photon singularity, e.g. a min range of $66 < m_{ee} < 116$ GeV

Available observables are the pT of jets 1-4, jet multiplicity, $\Delta\eta(Z, \text{jet1})$, $\Delta R(\text{jet2}, \text{jet3})$, differential jet rates 0->1, 1->2, 2->3, 3->4, and integrated 0--4 jet rates. Bare leptons are used.

MC_ZJETS_MU

Monte Carlo validation observables for $Z[mu^+ \, mu^-]$ + jets production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
  • Gavin Hesketh
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $mu^+ mu^-$ + jets analysis. Needs mass cut on lepton pair to avoid photon singularity, e.g. a min range of $66 < m_{mumu} < 116$ GeV

Available observables are the pT of jets 1-4, jet multiplicity, $\Delta\eta(Z, \text{jet1})$, $\Delta R(\text{jet2}, \text{jet3})$, differential jet rates 0->1, 1->2, 2->3, 3->4, and integrated 0--4 jet rates.

MC_ZJETS_MU_BARE

Monte Carlo validation observables for $Z[mu^+ \, mu^-]$ + jets production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
  • Gavin Hesketh
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $mu^+ mu^-$ + jets analysis. Needs mass cut on lepton pair to avoid photon singularity, e.g. a min range of $66 < m_{mumu} < 116$ GeV

Available observables are the pT of jets 1-4, jet multiplicity, $\Delta\eta(Z, \text{jet1})$, $\Delta R(\text{jet2}, \text{jet3})$, differential jet rates 0->1, 1->2, 2->3, 3->4, and integrated 0--4 jet rates. Bare leptons are used.

MC_ZKTSPLITTINGS

Monte Carlo validation observables for $Z[e^+ \, e^-]$ + jets production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $e^+ e^-$ + jets analysis. Needs mass cut on lepton pair to avoid photon singularity, e.g. a min range of $66 < m_{ee} < 116$ GeV

Monte Carlo validation observables for $Z[e^+ \, e^-]$ + jets production

MC_ZZINC

Monte Carlo validation observables for $Z[e^+ \, e^-]Z[\mu^+ \, \mu^-]$ production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $ZZ$ + jets analysis. Needs mass cut on lepton pairs to avoid photon singularity, e.g. a min range of $66 < m_{ee} < 116$ GeV

Monte Carlo validation observables for $Z[e^+ \, e^-]Z[\mu^+ \, \mu^-]$ production

MC_ZZJETS

Monte Carlo validation observables for $Z[e^+ \, e^-]Z[\mu^+ \, \mu^-]$ + jets production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $ZZ$ + jets analysis. Needs mass cut on lepton pairs to avoid photon singularity, e.g. a min range of $66 < m_{ee} < 116$ GeV

In addition to the typical jet observables this analysis contains observables related to properties of the ZZ-pair momentum, correlations between the ZZ, properties of the Z bosons, properties of the leptons, correlations between the opposite charge leptons and correlations with jets.

MC_ZZKTSPLITTINGS

Monte Carlo validation observables for $Z[e^+ \, e^-]Z[\mu^+ \, \mu^-]$ + jets production
Experiment: ()
Status: VALIDATED
Authors:
  • Frank Siegert
No references listed
Beams: * *
Beam energies: ANY
Run details:
  • $ZZ$ + jets analysis. Needs mass cut on lepton pairs to avoid photon singularity, e.g. a min range of $66 < m_{ee} < 116$ GeV

Monte Carlo validation observables for $Z[e^+ \, e^-]Z[\mu^+ \, \mu^-]$ + jets production

OPAL_1992_I321190

Hadronic Z decay charged multiplicity measurement
Experiment: OPAL (LEP 1)
Inspire ID: 321190
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Z.Phys. C53 (1992) 539-554
Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV)

The charged particle multiplicity distribution of hadronic Z decays, as measured on the peak of the Z resonance using the OPAL detector at LEP.

OPAL_1993_I342766

A Measurement of $K^{*\pm}$ (892) production in hadronic Z0 decays
Experiment: OPAL (LEP)
Inspire ID: 342766
Status: VALIDATED
Authors:
  • Simone Amoroso
References: Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • electron positron collisions at the Z0 resonance with hadronic decays

OPAL measurement of the inclusive cross section for K^{*\pm} (892) production in hadronic decays of the Z0

OPAL_1993_S2692198

Measurement of photon production at LEP 1
Experiment: OPAL (LEP Run 1)
Inspire ID: 343181
Status: UNVALIDATED
Authors:
  • Peter Richardson
References: Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • $e^+ e^- \to$ jet jet (+ photons)

Measurement of the production of photons in $e^+ e^-\to q \bar q$ events at LEP 1.

OPAL_1994_S2927284

Measurement of the production rates of charged hadrons in $e^+e^-$ annihilation at the $Z^0$
Experiment: OPAL (LEP 1)
Inspire ID: 372772
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Z.Phys.C63:181-196,1994
Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV)

The inclusive production rates of $\pi^\pm$, $K^\pm$ and $p\bar{p}$ in $Z^0$ decays measured using the OPAL detector at LEP. Only the differential cross sections are currently implemented.

OPAL_1995_S3198391

$\Delta^{++}$ Production in Hadronic $Z^0$ Decays
Experiment: OPAL (LEP 1)
Inspire ID: 398320
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Phys.Lett.B358:162-172,1995
Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV)

The production of $\Delta^{++}$ baryons measured using 3.5 millon $Z^0$ events by the OPAL experiment at LEP. Only the fragmentation function is implemented.

OPAL_1996_S3257789

$J/\psi$ and $\psi^\prime$ Production in Hadronic $Z^0$ Decays
Experiment: OPAL (LEP 1)
Inspire ID: 402487
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Z.Phys. C70 (1996) 197-210
Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV)

The production of $J/\psi$ and $\psi^\prime$ mesons measured by the OPAL experiment at LEP. The fragmentation function for $J/\psi$ and the multiplicities of $J/\psi$ and $\psi^\prime$ are included.

OPAL_1997_S3396100

Strange baryon production in $Z$ hadronic decays at OPAL
Experiment: OPAL (LEP 1)
Inspire ID: 421978
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Z. Phys. C, 73, 569--586 (1997)
Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV)

Measurement of the $\Xi^-$, $\Lambda^0$, $\Sigma^+(1385)$, $\Sigma^-(1385)$, $\Xi^0(1530)$ and $\Lambda^0(1520)$ scaled momentum distributions by OPAL at LEP 1. The paper also has the production cross-sections of these particles, but that is not implemented in Rivet.

OPAL_1997_S3608263

$K^{*0}$ meson production measured by OPAL at LEP 1.
Experiment: OPAL (LEP 1)
Inspire ID: 447146
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Phys.Lett.B412:210-224,1997
  • hep-ex/9708022
Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV)

The $K^{*0}$ fragmentation function has been measured in hadronic $Z^0$ decays. In addition the helicity density matrix elements for inclusive $K^*(892)^0$ mesons from hadronic $Z^0$ decays have been measured over the full range of $K^{*0}$ momentum using data taken with the OPAL experiment at LEP. Only the fragmentation function measurement is currently implemented.

OPAL_1998_S3702294

Production of $f_0(980)$, $f_2(1270)$ and $\phi(1020)$ in hadronic $Z^0$ decay
Experiment: OPAL (LEP 1)
Inspire ID: 467092
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Eur.Phys.J.C4:19-28,1998
  • hep-ex/9802013
Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV)

Inclusive production of the $f_0(980)$, $f_2(1270)$ and $\phi(1020)$ resonances studied in a sample of 4.3 million hadronic $Z^0$ decays from the OPAL experiment at LEP. Fragmentation functions are reported for the three states.

OPAL_1998_S3749908

Photon and Light Meson Production in Hadronic $Z^0$ Decays
Experiment: OPAL (LEP 1)
Inspire ID: 470419
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Eur.Phys.J.C5:411-437,1998
  • hep-ex/9805011
Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV)

The inclusive production rates and differential cross sections of photons and mesons with a final state containing photons have been measured with the OPAL detector at LEP. The light mesons covered by the measurements are the $\pi^0$, $\eta$, $\rho(770)^\pm$, $\omega(782)$, $\eta'(958)$ and $a_0(980)^\pm$.

OPAL_1998_S3780481

Measurements of flavor dependent fragmentation functions in $Z^0 -> q \bar{q}$ events
Experiment: OPAL (LEP 1)
Inspire ID: 472637
Status: VALIDATED
Authors:
  • Hendrik Hoeth
References:
  • Eur. Phys. J, C7, 369--381 (1999)
  • hep-ex/9807004
Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV)

Measurement of scaled momentum distributions and total charged multiplicities in flavour tagged events at LEP 1. OPAL measured these observables in uds-, c-, and b-events separately. An inclusive measurement is also included.

OPAL_2000_S4418603

Multiplicities of $\pi^0$, $\eta$, $K^0$ and of charged particles in quark and gluon jets
Experiment: OPAL (LEP 1)
Inspire ID: 529898
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Eur.Phys.J.C17:373-387,2000
  • hep-ex/0007017
Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV)

Multiplicities of $\pi^0$, $\eta$, $K^0$ and of charged particles in quark and gluon jets in 3-jet events, as measured by the OPAL experiment at LEP. The main implemented measurement is the $K^0$ fragmentation function.

OPAL_2001_S4553896

Four-jet angles using Durham algorithm
Experiment: OPAL (LEP Run 1)
Inspire ID: 552446
Status: VALIDATED
Authors:
  • Frank Siegert
References: Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV) Hadronisation should be turned off because the data is corrected back to the parton level.

Angles between the leading (in energy) four jets defined using the Durham algorithm with $y_\mathrm{cut}=0.008$. The data is presented at the parton level and includes the Bengtsson-Zerwas, Korner-Schierholz-Willrodt and Nachtmann-Reiter angles as well as the angle between the two softest jets.

OPAL_2002_S5361494

Charged particle multiplicities in heavy and light quark initiated events above the $Z^0$ peak
Experiment: OPAL (LEP 2)
Inspire ID: 601225
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Phys.Lett. B550 (2002) 33-46
  • hep-ex/0211007
Beams: e+ e-
Beam energies: (65.0, 65.0); (68.0, 68.0); (80.5, 80.5); (86.0, 86.0); (91.5, 91.5); (94.5, 94.5); (96.0, 96.0); (98.0, 98.0); (100.0, 100.0); (101.0, 101.0); (103.0, 103.0) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV)

Measurements of the mean charged multiplicities separately for $b\bar b$, $c\bar c$ and light quark ($uds$) initiated events in $e^+e^-$ interactions at energies above the $Z^0$ mass. The data is from the LEP running periods between 1995 and 2000.

OPAL_2003_I599181

Inclusive analysis of the b quark fragmentation function in Z decays
Experiment: OPAL (LEP2)
Inspire ID: 599181
Status: VALIDATED
Authors:
  • Simone Amoroso
References: Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV)

A study of b quark fragmentation function is presented using inclusively reconstructed weakly decaying B hadrons. The measurement uses about four million hadronic Z decays recorded in 1992-2000 with the OPAL detector at LEP.

OPAL_2004_I631361

Gluon jet charged multiplicities and fragmentation functions
Experiment: OPAL (LEP)
Inspire ID: 631361
Status: VALIDATED
Authors:
  • Daniel Reichelt [d.reichelt@cern.ch]
References:
  • Phys. Rev. D69, 032002,2004
  • hep-ex/0310048
Beams: e+ e-
Beam energies: (5.2, 5.2); (6.0, 6.0); (7.0, 7.0); (8.4, 8.4); (10.9, 10.9); (14.2, 14.2); (17.7, 17.7) GeV
Run details:
  • The fictonal $e^+e^-\to gg$ process is required.

Measurement of gluon jet properties using the jet boost algorithm, a technique to select unbiased samples of gluon jets in $e^+e^-$ annihilation, i.e. gluon jets free of biases introduced by event selection or jet finding criteria. This analysis requires the fictional $e^+e^-\to g g $ process to be used due to the corrections applied to the data. It allows the study of gluon jet properties. This analysis can be used for tuning etc..

OPAL_2004_I631361_qq

Gluon jet charged multiplicities and fragmentation functions
Experiment: OPAL (LEP)
Inspire ID: 631361
Status: VALIDATED
Authors:
  • Daniel Reichelt [d.reichelt@cern.ch]
References:
  • Phys. Rev. D69, 032002,2004
  • hep-ex/0310048
Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • $e^+e^-\to q\bar q$.

Measurement of gluon jet properties using the jet boost algorithm, a technique to select unbiased samples of gluon jets in $e^+e^-$ annihilation, i.e. gluon jets free of biases introduced by event selection or jet finding criteria. This analysis uses the original analysis technique to extract gluon jets from hadronic $e^+e^-$ events. It cannot therefore be used for tuning as the data has been corrected for impurities, however it is still useful qualitatively in order to check the properties of gluon jets in the original way in which there were measured rather than using a fictitious process.

OPAL_2004_I648738

Quark and gluon jet fragmentation functions
Experiment: OPAL (LEP)
Inspire ID: 648738
Status: VALIDATED
Authors:
  • Daniel Reichelt [d.reichelt@cern.ch]
References:
  • Eur.Phys.J. C37 (2004) no.1, 25-47
  • hep-ex/0404026
Beams: e+ e-
Beam energies: (6.4, 6.4); (13.4, 13.4); (24.0, 24.0); (45.6, 45.6); (46.5, 46.5); (48.5, 48.5); (98.5, 98.5) GeV
Run details:
  • For quark fragmentation $e^+e^-\to q\bar{q}$ events are required, while for gluon fragmentation the fictonal $e^+e^-\to gg$ process is required.

Measurement of the fragmentation functions for quarks and gluons at LEP. Useful for studying the properties of gluon jets and the differences between quark and gluon jets. For the study of gluon jets the fictional $e^+e^-\to g g $ process must be used. The data in histograms labelled "hemisphere fragmentation" are measured from jets defined by hemispheres, with an energy scale defined by $E=\sqrt{s}/2$, while data in histograms named "durham fragmentation" are measured from jets defined by the durham algorithm with $Q_\mathrm{jet}=E_\mathrm{jet}\sin(\theta/2)$ as the energy scale. The rivet analysis defines the jet flavour from the initial quarks, as the data are corrected for impurities, and defines all jets as hemispheres with energy scale $E=\sqrt{s}/2$.

OPAL_2004_S6132243

Event shape distributions and moments in $e^+ e^-$ -> hadrons at 91--209 GeV
Experiment: OPAL (LEP 1 & 2)
Inspire ID: 669402
Status: VALIDATED
Authors:
  • Andy Buckley
References: Beams: e+ e-
Beam energies: (45.6, 45.6); (66.5, 66.5); (88.5, 88.5); (98.5, 98.5) GeV
Run details:
  • Hadronic $e^+ e^-$ events at 4 representative energies (91, 133, 177, 197). Runs need to have ISR suppressed, since the analysis was done using a cut of $\sqrt{s} - \sqrt{s_\text{reco}} < 1\,\text{GeV}$. Particles with a livetime $> 3 \cdot 10^{-10}\,\text{s}$ are considered to be stable.

Measurement of $e^+ e^-$ event shape variable distributions and their 1st to 5th moments in LEP running from the Z pole to the highest LEP 2 energy of 209 GeV.

PDG_HADRON_MULTIPLICITIES

Hadron multiplicities in hadronic $e^+e^-$ events
Experiment: PDG (Various)
Spires ID: 7857373
Status: VALIDATED
Authors:
  • Hendrik Hoeth
References:
  • Phys. Lett. B, 667, 1 (2008)
Beams: e+ e-
Beam energies: (5.0, 5.0); (17.5, 17.5); (45.6, 45.6); (88.5, 88.5) GeV
Run details:
  • Hadronic events in $e^+ e^-$ collisions

Hadron multiplicities in hadronic $e^+e^-$ events, taken from Review of Particle Properties 2008, table 40.1, page 355. Average hadron multiplicities per hadronic $e^+e^-$ annihilation event at $\sqrt{s} \approx {}$ 10, 29--35, 91, and 130--200 GeV. The numbers are averages from various experiments. Correlations of the systematic uncertainties were considered for the calculation of the averages.

PDG_HADRON_MULTIPLICITIES_RATIOS

Ratios (w.r.t. $\pi^+/\pi^-$) of hadron multiplicities in hadronic $e^+e^-$ events
Experiment: PDG (Various)
Spires ID: 7857373
Status: VALIDATED
Authors:
  • Holger Schulz
References:
  • Phys. Lett. B, 667, 1 (2008)
Beams: e+ e-
Beam energies: (5.0, 5.0); (17.5, 17.5); (45.6, 45.6); (88.5, 88.5) GeV
Run details:
  • Hadronic events in $e^+ e^-$ collisions

Ratios (w.r.t. $\pi^+/\pi^-$) of hadron multiplicities in hadronic $e^+ e^-$ events, taken from Review of Particle Properties 2008, table 40.1, page 355. Average hadron multiplicities per hadronic $e^+ e^-$ annihilation event at $\sqrt{s} \approx$ 10, 29--35, 91, and 130--200 GeV, normalised to the pion multiplicity. The numbers are averages from various experiments. Correlations of the systematic uncertainties were considered for the calculation of the averages.

PDG_TAUS

Tau branching fractions from PDG
Experiment: PDG (Various)
Inspire ID: 1315584
Status: VALIDATED
Authors:
  • Holger Schulz
References:
  • Chin.Phys. C38 (2014) 090001
Beams: * *
Beam energies: ANY
Run details:
  • Works with collision events and particle guns

Hadronic and leptonic tau decays are analysed to compare to PDG data of branching fractions.

PLUTO_1980_I154270

Hadronic charged multiplicity measurement between 12 and 31.3 GeV
Experiment: PLUTO (PETRA)
Inspire ID: 154270
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Phys.Lett. 95B (1980) 313-317
Beams: e+ e-
Beam energies: (4.7, 4.7); (6.0, 6.0); (6.5, 6.5); (8.5, 8.5); (11.0, 11.0); (13.8, 13.8); (15.1, 15.1); (15.3, 15.3); (15.7, 15.7); (15.4, 15.4) GeV
Run details:
  • Hadronic e+ e- events generated below the Z pole

The charged particle multiplicity distribution of hadronic $e^+e^-$ events as measured between 12 and 31.3 GeV using the PLUTO detector at PETRA. The decay products of weakly decaying strange hadrons, e.g. $K^0_s$ and $\Lambda^0$, are not included in the measurement.

SFM_1984_S1178091

Charged multiplicity distribution in $pp$ interactions at CERN ISR energies
Experiment: SFM (CERN ISR)
Inspire ID: 196601
Status: UNVALIDATED
Authors:
  • Holger Schulz
  • Andy Buckley
References:
  • Phys.Rev.D30:528,1984
Beams: p+ p+
Beam energies: (15.2, 15.2); (22.2, 22.2); (26.1, 26.1); (31.1, 31.1) GeV
Run details:
  • QCD events, double-diffractive events.

WARNING - implemented to the best of abilities, no theory curve in the publication to compare to. Charged multiplicities are measured at $\sqrt{s} = 30.4$, 44.5, 52.2 and 62.2 GeV using a minimum-bias trigger. The data is sub-divided into inelastic as well as non-single-diffractive events.

SLD_1996_S3398250

Charged particle multiplicities in heavy and light quark initiated events on the $Z^0$ peak
Experiment: SLD (SLC)
Inspire ID: 422172
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Phys.Lett.B386:475-485,1996
  • hep-ex/9608008
Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV)

Measurements of the mean charged multiplicities separately for $b\bar b$, $c\bar c$ and light quark ($uds$) initiated events in $e^+e^-$ interactions at the $Z^0$ mass.

SLD_1999_S3743934

Production of $\pi^+$, $K^+$, $K^0$, $K^{*0}$, $\Phi$, $p$ and $\Lambda^0$ in hadronic $Z^0$ decay
Experiment: SLD (SLC)
Inspire ID: 469925
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Phys.Rev.D59:052001,1999
  • hep-ex/9805029
Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV)

Measurement of scaled momentum distributions and fragmentation functions in flavour tagged events at SLC. SLD measured these observables in uds-, c-, and b-events separately. An inclusive measurement is also included.

SLD_2002_S4869273

Measurement of the b-quark fragmentation function in $Z^0$ decays
Experiment: SLD (SLC)
Inspire ID: 582951
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Phys. Rev.D65:092006,2002
  • hep-ex/0202031
Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV)

Measurement of the $b$-quark fragmentation function by SLC. The fragmentation function for weakly decaying $b$-quarks has been measured.

SLD_2004_S5693039

Production of $\pi^+$, $\pi^-$, $K^+$, $K^-$, $p$ and $\bar p$ in Light ($uds$), $c$ and $b$ Jets from Z Decays
Experiment: SLD (SLC)
Inspire ID: 630327
Status: VALIDATED
Authors:
  • Peter Richardson
References: Beams: e+ e-
Beam energies: (45.6, 45.6) GeV
Run details:
  • Hadronic Z decay events generated on the Z pole ($\sqrt{s} = 91.2$ GeV)

Measurements of the differential production rates of stable charged particles in hadronic $Z^0$ decays, and of charged pions, kaons and protons identified over a wide momentum range. In addition to flavour-inclusive $Z^0$ decays, measurements are made for $Z^0$ decays into light ($u$, $d$, $s$), $c$ and $b$ primary flavors.

STAR_2006_S6500200

Identified hadron spectra in pp at 200 GeV
Experiment: STAR (RHIC pp 200 GeV)
Inspire ID: 709170
Status: VALIDATED
Authors:
  • Bedanga Mohanty
  • Hendrik Hoeth
References: Beams: p+ p+
Beam energies: (100.0, 100.0) GeV
Run details:
  • pp at 200 GeV

pT distributions of charged pions and (anti)protons in pp collisions at $\sqrt{s} = 200$ GeV, measured by the STAR experiment at RHIC in non-single-diffractive minbias events.

STAR_2006_S6860818

Strange particle production in pp at 200 GeV
Experiment: STAR (RHIC pp 200 GeV)
Inspire ID: 722757
Status: VALIDATED
Authors:
  • Hendrik Hoeth
References:
  • Phys. Rev. C75, 064901
  • nucl-ex/0607033
Beams: p+ p+
Beam energies: (100.0, 100.0) GeV
Run details:
  • pp at 200 GeV

pT distributions of identified strange particles in pp collisions at $\sqrt{s} = 200$ GeV, measured by the STAR experiment at RHIC in non-single-diffractive minbias events. WARNING The $\langle pT \rangle$ vs. particle mass plot is not validated yet and might be wrong.

STAR_2006_S6870392

Inclusive jet cross-section in pp at 200 GeV
Experiment: STAR (RHIC pp 200 GeV)
Inspire ID: 723509
Status: VALIDATED
Authors:
  • Hendrik Hoeth
References:
  • Phys. Rev. Lett. 97, 252001
  • hep-ex/0608030
Beams: p+ p+
Beam energies: (100.0, 100.0) GeV
Run details:
  • pp at 200 GeV

Inclusive jet cross section as a function of pT in pp collisions at $\sqrt{s} = 200$ GeV, measured by the STAR experiment at RHIC.

STAR_2008_S7869363

Multiplicities and pT spectra from STAR for $pp$ at 200 GeV
Experiment: STAR (RHIC)
Inspire ID: 793126
Status: UNVALIDATED
Authors:
  • Holger Schulz
References:
  • arXiv: 0808.2041
  • http://drupal.star.bnl.gov/STAR/files/starpublications/124/data.html
Beams: p+ p+
Beam energies: (100.0, 100.0) GeV
Run details:
  • QCD (pp) events at 200 GeV

Charged multiplicity and identified charged particle spectra

STAR_2008_S7993412

Di-hadron correlations in $d$-Au at 200 GeV
Experiment: STAR (RHIC d-Au 200 GeV)
Inspire ID: 810030
Status: UNVALIDATED
Authors:
  • Christine Nattrass
  • Hendrik Hoeth
References: Beams: p+ p+
Beam energies: (100.0, 100.0) GeV
Run details:
  • $d$-Au at 200 GeV, but use $pp$ Monte Carlo! See description.

Correlation in $\eta$ and $\phi$ between the charged hadron with the highest pT (``trigger particle'') and the other charged hadrons in the event (``associated particles''). The data was collected in d-Au collisions at 200 GeV. Nevertheless, it is very proton--proton like and can therefore be compared to $pp$ Monte Carlo (not for tuning, but for qualitative studies.)

STAR_2009_UE_HELEN

UE measurement in $pp$ at 200 GeV
Experiment: STAR (RHIC)
Spires ID: None
Status: PRELIMINARY
Authors:
  • Helen Caines
  • Hendrik Hoeth
References: Beams: p+ p+
Beam energies: (100.0, 100.0) GeV
Run details:
  • $pp$ at 200 GeV

WARNING! Mark as "STAR preliminary" and contact authors when using this! UE analysis similar to Rick Field's leading jet analysis. SIScone with radius/resolution parameter R=0.7 is used. Particles with $pT > 0.2 \text{GeV}$ and $|\eta| < 1$ are included in the analysis. All particles are assumed to have zero mass. Only jets with neutral energy $< 0.7$ are included. For the transMIN and transMAX $\Delta(\phi)$ is between $\pi/3$ and $2\pi/3$, and $\Delta(\eta) < 2.0$. For the jet region the area of the jet is used for the normalization, i.e. the scaling factor is $\pi R^2$ and not $\mathrm{d}\phi\mathrm{d}\eta$ (this is different from what Rick Field does!). The tracking efficiency is $\sim 0.8$, but that is an approximation, as below $pT \sim 0.6 \text{GeV}$ it is falling quite steeply.

TASSO_1989_I277658

Hadronic charged multiplicity measurement between 14 and 43.6 GeV
Experiment: TASSO (PEP)
Inspire ID: 277658
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Z.Phys. C45 (1989) 193
Beams: e+ e-
Beam energies: (7.0, 7.0); (11.0, 11.0); (17.4, 17.4); (21.8, 21.8) GeV
Run details:
  • Hadronic e+ e- events generated below the Z pole

The charged particle multiplicity distribution of hadronic $e^+e^-$ events as measured between 14 and 43.6 GeV using the TASSO detector at PEP.

TASSO_1990_S2148048

Event shapes in $e^+ e^-$ annihilation at 14--44\;GeV
Experiment: TASSO (PETRA)
Inspire ID: 294755
Status: VALIDATED
Authors:
  • Holger Schulz
References:
  • Z.Phys.C47:187-198,1990
  • DESY-90-013
Beams: e- e+
Beam energies: (7.0, 7.0); (11.0, 11.0); (17.5, 17.5); (21.9, 21.9) GeV
Run details:
  • $e^+ e^- \to \text{jet jet}$ (+ jets). Kinematic cuts such as CKIN(1) in Pythia need to be set slightly below the CMS energy.

Event shapes Thrust, Sphericity, Aplanarity at four different energies

TOTEM_2012_002

Measurement of proton-proton elastic scattering and total cross section at $\sqrt{s} = 7\;\text{TeV}$
Experiment: TOTEM (LHC)
Inspire ID: 1220862
Status: VALIDATED
Authors:
  • Sercan Sen
  • Peter Skands
References:
  • CERN-PH-EP-2012-239
  • http://cds.cern.ch/record/1472948
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Elastic events only.

Measurement of the elastic differential cross-section in proton-proton interactions at a centre-of-mass energy $\sqrt{s} = 7\;\text{TeV}$ at the LHC. The data, which cover the $|t|$ range $0.005-0.2\;\text{GeV}^2$, were collected using Roman Pot detectors very close to the outgoing beam in October 2011, allowing the precise extrapolation down to the optical point, $t = 0$, and hence the derivation of the elastic as well as the total cross-section via the optical theorem.

TOTEM_2012_I1115294

Forward $\mathrm{d}N/\mathrm{d}\eta$ at 7\;TeV
Experiment: TOTEM (LHC)
Inspire ID: 1115294
Status: VALIDATED
Authors:
  • Hendrik Hoeth
References:
  • Europhys.Lett. 98 (2012) 31002
  • arXiv: 1205.4105
  • CERN-PH-EP-2012-106
  • TOTEM 2012-01
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • pp QCD interactions at 900 GeV and 7 TeV.

The TOTEM experiment has measured the charged particle pseudorapidity density $\mathrm{d}N_\text{ch}/\mathrm{d}\eta$ in $pp$ collisions at $\sqrt{s} = 7$\,TeV for $5.3 < |\eta| < 6.4$ in events with at least one charged particle with transverse momentum above 40\;MeV/$c$ in this pseudorapidity range.

TOTEM_2012_I1220862

Measurement of proton-proton elastic scattering and total cross section at $\sqrt{s} = 7\;\text{TeV}$
Experiment: TOTEM (LHC)
Inspire ID: 1220862
Status: VALIDATED
Authors:
  • Sercan Sen
  • Peter Skands
References:
  • CERN-PH-EP-2012-239
  • http://cds.cern.ch/record/1472948
Beams: p+ p+
Beam energies: (3500.0, 3500.0) GeV
Run details:
  • Elastic events only.

Measurement of the elastic differential cross-section in proton-proton interactions at a centre-of-mass energy $\sqrt{s} = 7\;\text{TeV}$ at the LHC. The data, which cover the $|t|$ range $0.005-0.2\;\text{GeV}^2$, were collected using Roman Pot detectors very close to the outgoing beam in October 2011, allowing the precise extrapolation down to the optical point, $t = 0$, and hence the derivation of the elastic as well as the total cross-section via the optical theorem.

TOTEM_2014_I1328627

Forward charged particle pseudorapidity density in $pp$ collisions at $\sqrt{s} = 8 \text{TeV}$ using a displaced interaction point
Experiment: TOTEM (LHC)
Inspire ID: 1328627
Status: VALIDATED
Authors:
  • Sercan Sen
References:
  • EPJ C75,126
  • CERN-PH-EP-2014-260
  • arxiv:1411.4963
Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
  • $pp$ QCD interactions at 8 TeV.

The pseudorapidity density of charged particles $\mathrm{d}N_\mathrm{ch}/\mathrm{d}\eta$ is measured by the TOTEM experiment in $pp$ collisions at $\sqrt{s} = 8$ TeV within the ranges $3.9 < \eta < 4.7$ and $-6.95 < \eta < -6.9$. Data were collected in a low intensity LHC run with collisions occurring at a distance of 11.25\,m from the nominal interaction point. The data sample is expected to include 96--97\% of the inelastic proton--proton interactions. The measurement reported here considers charged particles with $p_T > 0$ MeV/$c$, produced in inelastic interactions with at least one charged particle in $-7 < \eta < -6$ or $3.7 < \eta < 4.8$. The $\mathrm{d}N_\mathrm{ch}/\mathrm{d}\eta$ has been found to decrease with $|\eta|$, from $5.11 \pm 0.73$ at $\eta = 3.95$ to $1.81 \pm 0.56$ at $\eta = -6.925$.

TPC_1987_I235694

Charged Hadron multiplicity at 29 GeV, flavour separated
Experiment: TPC (PEP)
Inspire ID: 235694
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Phys.Lett. B184 (1987) 299-304
Beams: e+ e-
Beam energies: (14.5, 14.5) GeV
Run details:
  • Hadronic e+e- events at $\sqrt{s} = 29.$ GeV

The charged particle multiplicity distribution of hadronic $e^+e^-$ events, as measured at $\sqrt{s} = 29.$ GeV using the TPC detector at PEP. The multiplicities are measured separately for light, charm and bottom events as well as the results averaged over the quark flavours.

UA1_1990_S2044935

UA1 multiplicities, transverse momenta and transverse energy distributions.
Experiment: UA1 (SPS)
Inspire ID: 280412
Status: VALIDATED
Authors:
  • Andy Buckley
  • Christophe Vaillant
References:
  • Nucl.Phys.B353:261,1990
Beams: p- p+
Beam energies: (31.5, 31.5); (100.0, 100.0); (250.0, 250.0); (450.0, 450.0) GeV
Run details:
  • QCD min bias events at sqrtS = 63, 200, 500 and 900 GeV.

Particle multiplicities, transverse momenta and transverse energy distributions at the UA1 experiment, at energies of 200, 500 and 900 GeV (with one plot at 63 GeV for comparison).

UA5_1982_S875503

UA5 multiplicity and pseudorapidity distributions for $pp$ and $p\bar{p}$.
Experiment: UA5 (SPS)
Inspire ID: 176647
Status: VALIDATED
Authors:
  • Andy Buckley
  • Christophe Vaillant
References:
  • Phys.Lett.112B:183,1982
Beams: p- p+, p+ p+
Beam energies: (26.5, 26.5) GeV
Run details:
  • Min bias QCD events at $\sqrt{s} = 53$\;GeV. Run with both $pp$ and $p\bar{p}$ beams.

Comparisons of multiplicity and pseudorapidity distributions for $pp$ and $p\bar{p}$ collisions at 53 GeV, based on the UA5 53 GeV runs in 1982. Data confirms the lack of significant difference between the two beams.

UA5_1986_S1583476

Pseudorapidity distributions in $p\bar{p}$ (NSD, NSD+SD) events at $\sqrt{s} = 200$ and 900 GeV
Experiment: UA5 (CERN SPS)
Inspire ID: 233599
Status: VALIDATED
Authors:
  • Andy Buckley
  • Holger Schulz
  • Christophe Vaillant
References:
  • Eur. Phys. J. C33, 1, 1986
Beams: p- p+
Beam energies: (100.0, 100.0); (450.0, 450.0) GeV
Run details:
  • Single- and double-diffractive, plus non-diffractive inelastic, events. * $p\bar{p}$ collider, $\sqrt{s} = 200$ or 900 GeV. * The trigger implementation for NSD events is the same as in, e.g., the UA5_1989 analysis. No further cuts are needed.

This study comprises measurements of pseudorapidity distributions measured with the UA5 detector at 200 and 900 GeV center of momentum energy. There are distributions for non-single diffractive (NSD) events and also for the combination of single- and double-diffractive events. The NSD distributions are further studied for certain ranges of the events charged multiplicity.

UA5_1987_S1640666

UA5 charged multiplicity measurements at 546 GeV
Experiment: UA5 (CERN SPS)
Inspire ID: 244829
Status: VALIDATED
Authors:
  • Holger Schulz
References:
  • Phys.Rept.154:247-383,1987
Beams: p- p+
Beam energies: (273.0, 273.0) GeV
Run details:
  • QCD and diffractive events at 546 GeV

Charged particle multiplicity measurement.

UA5_1988_S1867512

Charged particle correlations in UA5 $p\bar{p}$ NSD events at $\sqrt{s} = 200$, 546 and 900\;GeV
Experiment: UA5 (CERN SPS)
Inspire ID: 263399
Status: VALIDATED
Authors:
  • Holger Schulz
References:
  • Z.Phys.C37:191-213,1988
Beams: p- p+
Beam energies: (100.0, 100.0); (273.0, 273.0); (450.0, 450.0) GeV
Run details:
  • ppbar events. Non-single diffractive events need to be switched on. The trigger implementation is the same as in UA5_1989_S1926373. Important: Only the correlation strengths with symmetric eta bins should be used for tuning.

Data on two-particle pseudorapidity and multiplicity correlations of charged particles for non single-diffractive $p\bar{p}$ collisions at c.m. energies of 200, 546 and 900 GeV. Pseudorapidity correlations are interpreted in terms of a cluster model, which has been motivated by this and other experiments, require on average about two charged particles per cluster. The decay width of the clusters in pseudorapidity is approximately independent of multiplicity and of c.m. energy. The investigations of correlations in terms of pseudorapidity gaps confirm the picture of cluster production. The strength of forward--backward multiplicity correlations increases linearly with ins and depends strongly on position and size of the pseudorapidity gap separating the forward and backward interval. All our correlation studies can be understood in terms of a cluster model in which clusters contain on average about two charged particles, i.e. are of similar magnitude to earlier estimates from the ISR.

UA5_1989_S1926373

UA5 charged multiplicity measurements
Experiment: UA5 (CERN SPS)
Inspire ID: 267179
Status: VALIDATED
Authors:
  • Holger Schulz
  • Christophe L. J. Vaillant
  • Andy Buckley
References: Beams: p- p+
Beam energies: (100.0, 100.0); (450.0, 450.0) GeV
Run details:
  • Minimum bias events at $\sqrt{s} = 200$ and 900 GeV. Enable single and double diffractive events in addition to non-diffractive processes.

Multiplicity distributions of charged particles produced in non-single-diffractive collisions between protons and antiprotons at centre-of-mass energies of 200 and 900 GeV. The data were recorded in the UA5 streamer chambers at the CERN collider, which was operated in a pulsed mode between the two energies. This analysis confirms the violation of KNO scaling in full phase space found by the UA5 group at an energy of 546 GeV, with similar measurements at 200 and 900 GeV.

ZEUS_2001_S4815815

Dijet photoproduction analysis
Experiment: ZEUS (HERA Run I)
Inspire ID: 568665
Status: VALIDATED
Authors:
  • Andy Buckley
  • Ilkka Helenius
  • Jon Butterworth
References:
  • Eur.Phys.J.C23:615,2002
  • DESY 01/220
  • hep-ex/0112029
Beams: p+ e+
Beam energies: (820.0, 27.5) GeV
Run details:
  • 820 GeV protons colliding with 27.5 GeV positrons; Direct and resolved photoproduction of dijets; Leading jet $pT > 14$ GeV, second jet $pT > 11$ GeV; Jet pseudorapidity $-1 < |\eta| < 2.4$

ZEUS photoproduction of jets from proton--positron collisions at beam energies of 820 GeV on 27.5 GeV. Photoproduction can either be direct, in which case the photon interacts directly with the parton, or resolved, in which case the photon acts as a source of quarks and gluons. A photon-proton centre of mass energy of between 134 GeV and 227 GeV is probed, with values of $x_P$, the fractional momentum of the partons inside the proton, predominantly in the region between 0.01 and 0.1. The fractional momentum of the partons from the photon, $x_\gamma$, is in the region 0.1 to 1. Jets are reconstructed in the range $-1 < |\eta| < 2.4$ using the $k_\perp$ algorithm with an $R$ parameter of 1.0. The minimum p_\perp of the leading jet should be greater than 14 GeV, and at least one other jet must have $p_\perp > 11$ GeV.