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CMS_2018_I1663452

Search for new physics in dijet angular distributions using proton-proton collisions at sqrt(s) = 13 TeV and constraints on dark matter and other models
Experiment: CMS (CERN LHC)
Inspire ID: 1663452
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 TeV using based on a data set corresponding to an integrated luminosity of 35.9/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.

Source code: CMS_2018_I1663452.cc
 1// -*- C++ -*-
 2#include "Rivet/Analysis.hh"
 3#include "Rivet/Projections/FastJets.hh"
 4
 5namespace Rivet {
 6
 7
 8  class CMS_2018_I1663452 : public Analysis {
 9  public:
10
11    RIVET_DEFAULT_ANALYSIS_CTOR(CMS_2018_I1663452);
12
13    void init() {
14      FinalState fs;
15      FastJets antikt(fs, JetAlg::ANTIKT, 0.4);
16      declare(antikt, "ANTIKT");
17      book(_h_chi_dijet, {2400., 3000., 4200., 4800., 5400., 6000.});
18      for (auto& b : _h_chi_dijet->bins()) {
19        book(b, _h_chi_dijet->numBins() - b.index() + 1, 1, 1);
20      }
21    }
22
23    void analyze(const Event& event) {
24      const Jets& jets = apply<JetFinder>(event, "ANTIKT").jetsByPt();
25      if (jets.size() < 2) vetoEvent;
26      FourMomentum j0(jets[0].momentum());
27      FourMomentum j1(jets[1].momentum());
28      double y0 = j0.rapidity();
29      double y1 = j1.rapidity();
30      if (fabs(y0+y1)/2. > 1.11) vetoEvent;
31      double mjj = FourMomentum(j0+j1).mass();
32      double chi = exp(fabs(y0-y1));
33      if(chi<16.)  _h_chi_dijet->fill(mjj, chi);
34    }
35
36
37    void finalize() {
38      normalize(_h_chi_dijet);
39    }
40
41
42  private:
43
44    Histo1DGroupPtr _h_chi_dijet;
45
46  };
47
48
49
50  RIVET_DECLARE_PLUGIN(CMS_2018_I1663452);
51
52}