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## Rivet analyses reference

### ATLAS_2017_I1604271

ATLAS Inclusive jet cross section measurement at sqrt(s)=8TeV
Experiment: ATLAS (LHC)
Inspire ID: 1604271
Status: VALIDATED
Authors:
• Jon Butterworth
• Jonathan Bossio
• Zdenek Hubacek
References:
Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
• LHC 8TeV, ATLAS, QCD jet production, anti-kt R=0.4 jets, anti-kt R=0.6 jets

Inclusive jet production cross-sections are measured in proton-proton collisions at a centre-of-mass energy of $\sqrt{s}=8$ TeV recorded by the ATLAS experiment at the Large Hadron Collider at CERN. The total integrated luminosity of the analysed data set amounts to 20.2 fb$^{-1}$. Double-differential cross-sections are measured for jets defined by the anti-$k_\text{t}$ jet clustering algorithm with radius parameters of $R=0.4$ and $R=0.6$ and are presented as a function of the jet transverse momentum, in the range between 70 GeV and 2.5 TeV and in six bins of the absolute jet rapidity, between 0 and 3.0. The measured cross-sections are compared to predictions of quantum chromodynamics, calculated at next-to-leading order in perturbation theory, and corrected for non-perturbative and electroweak effects. The level of agreement with predictions, using a selection of different parton distribution functions for the proton, is quantified. Tensions between the data and the theory predictions are observed.

Source code: ATLAS_2017_I1604271.cc
  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 `// -*- C++ -*- #include "Rivet/Analysis.hh" #include "Rivet/Projections/FinalState.hh" #include "Rivet/Projections/FastJets.hh" namespace Rivet { /// @brief Add a short analysis description here class ATLAS_2017_I1604271 : public Analysis { public: /// Constructor DEFAULT_RIVET_ANALYSIS_CTOR(ATLAS_2017_I1604271); /// Book histograms and initialise projections before the run void init() { const FinalState fs; declare(fs,"FinalState"); FastJets fj04(fs, FastJets::ANTIKT, 0.4); FastJets fj06(fs, FastJets::ANTIKT, 0.6); fj04.useInvisibles(); declare(fj04, "AntiKT04"); fj06.useInvisibles(); declare(fj06, "AntiKT06"); // |y| and ystar bins const int nybins = 6; double ybins[nybins+1] = { 0.0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0}; // Book histograms // pT histograms for (size_t i = 0; i < nybins; ++i){ // loop over |y| bins {Histo1DPtr tmp; _pThistograms6.add(ybins[i], ybins[i+1], book(tmp, i+1,1,1));} {Histo1DPtr tmp; _pThistograms4.add(ybins[i], ybins[i+1], book(tmp, i+7,1,1));} } } /// Perform the per-event analysis void analyze(const Event& event) { const Jets& kt4Jets = applyProjection(event, "AntiKT04").jetsByPt(Cuts::pT>70*GeV && Cuts::absrap < 3.0); const Jets& kt6Jets = applyProjection(event, "AntiKT06").jetsByPt(Cuts::pT>70*GeV && Cuts::absrap < 3.0); int nJets4 = kt4Jets.size(); int nJets6 = kt6Jets.size(); // Inclusive jet selection for(int ijet=0;ijet