Rivet analyses referenceCMS_2021_I1972986Measurement and QCD analysis of double-differential inclusive jet cross sections in proton-proton collisions at 13 TeVExperiment: CMS (LHC) Inspire ID: 1972986 Status: VALIDATED Authors:
Beam energies: (6500.0, 6500.0) GeV Run details:
A measurement of the inclusive jet production in proton-proton collisions at the LHC at √s = 13 TeV is presented. The double-differential cross sections are measured as a function of the jet transverse momentum pT and the absolute jet rapidity |y|. The anti-kT clustering algorithm is used with distance parameter of 0.4 (0.7) in a phase space region with jet pT from 97 GeV up to 3.1 TeV and |y|< 2.0. Data collected with the CMS detector are used, corresponding to an integrated luminosity of 36.3/fb (33.5/fb). The measurement is used in a comprehensive QCD analysis at next-to-next-to-leading order, which results in significant improvement in the accuracy of the parton distributions in the proton. Simultaneously, the value of the strong coupling constant at the Z boson mass is extracted as alpha_S(Z) = 0.1170 ± 0.0019. For the first time, these data are used in a standard model effective field theory analysis at next-to-leading order, where parton distributions and the QCD parameters are extracted simultaneously with imposed constraints on the Wilson coefficient c1 of 4-quark contact interactions. Source code: CMS_2021_I1972986.cc 1// -*- C++ -*-
2#include "Rivet/Analysis.hh"
3#include "Rivet/Projections/FinalState.hh"
4#include "Rivet/Projections/FastJets.hh"
5
6namespace Rivet {
7
8
9 /// Inclusive jet pT at 13 TeV
10 class CMS_2021_I1972986 : public Analysis {
11 public:
12
13 /// Constructor
14 RIVET_DEFAULT_ANALYSIS_CTOR(CMS_2021_I1972986);
15
16
17 /// Book histograms and initialize projections:
18 void init() {
19
20 // Initialize the projections
21 const FinalState fs;
22 declare(FastJets(fs, JetAlg::ANTIKT, 0.4), "JetsAK4");
23 declare(FastJets(fs, JetAlg::ANTIKT, 0.7), "JetsAK7");
24
25 // Book sets of histograms, binned in absolute rapidity
26 book(_hist_sigmaAK4, {0., 0.5, 1.0, 1.5, 2.0},
27 {"d01-x01-y01", "d02-x01-y01", "d03-x01-y01", "d04-x01-y01"});
28 book(_hist_sigmaAK7, {0., 0.5, 1.0, 1.5, 2.0},
29 {"d21-x01-y01", "d22-x01-y01", "d23-x01-y01", "d24-x01-y01"});
30 }
31
32
33 /// Per-event analysis
34 void analyze(const Event &event) {
35
36 // AK4 jets
37 const FastJets& fjAK4 = apply<FastJets>(event, "JetsAK4");
38 const Jets& jetsAK4 = fjAK4.jets(Cuts::ptIn(97*GeV, 3103*GeV) && Cuts::absrap < 2.0);
39 for (const Jet& j : jetsAK4) {
40 _hist_sigmaAK4->fill(j.absrap(), j.pT());
41 }
42
43 // AK7 jets
44 const FastJets& fjAK7 = apply<FastJets>(event, "JetsAK7");
45 const Jets& jetsAK7 = fjAK7.jets(Cuts::ptIn(97*GeV, 3103*GeV) && Cuts::absrap < 2.0);
46 for (const Jet& j : jetsAK7) {
47 _hist_sigmaAK7->fill(j.absrap(), j.pT());
48 }
49
50 }
51
52
53 // Finalize
54 void finalize() {
55 /// @note Extra division factor is the *signed* dy, i.e. 2*d|y|
56 scale(_hist_sigmaAK4, 0.5*crossSection()/picobarn/sumOfWeights());
57 scale(_hist_sigmaAK7, 0.5*crossSection()/picobarn/sumOfWeights());
58 divByGroupWidth({_hist_sigmaAK4, _hist_sigmaAK7});
59 }
60
61
62 /// @name Histograms
63 /// @{
64 Histo1DGroupPtr _hist_sigmaAK4;
65 Histo1DGroupPtr _hist_sigmaAK7;
66 /// @}
67
68 };
69
70
71 RIVET_DECLARE_PLUGIN(CMS_2021_I1972986);
72
73}
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