Rivet analyses

title: CMS_2017_I1519995

Search for new physics with dijet angular distributions in proton-proton collisions at $\sqrt{s} = 13 \TeV$

Experiment: CMS (CERN LHC)

Inspire ID: 1519995

Status: VALIDATED

Authors: - Andreas Hinzmann

References: - arXiv: 1703.09986 - CMS EXO-15-009

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 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.

Source code:CMS_2017_I1519995.cc

```c++ // -- C++ --

include "Rivet/Analysis.hh"

include "Rivet/Projections/FastJets.hh"

namespace Rivet {

/// Search for new physics with dijet angular distributions at 13 TeV class CMS_2017_I1519995 : public Analysis { public:

RIVET_DEFAULT_ANALYSIS_CTOR(CMS_2017_I1519995);


/// Book projections and histograms
void init() {

  FastJets antikt(FinalState(), JetAlg::ANTIKT, 0.4);
  declare(antikt, "ANTIKT");

  book(_h_chi_dijet, {1900., 2400., 3600., 4200., 4800., 8000.});
  for (auto& b : _h_chi_dijet->bins()) {
    book(b, _h_chi_dijet->numBins() - b.index() + 1, 1, 1);
  }
}


/// Per-event analysis
void analyze(const Event& event) {
  const Jets& jets = apply<JetFinder>(event, "ANTIKT").jetsByPt();
  if (jets.size() < 2) vetoEvent;

  const FourMomentum j0(jets[0].mom()), j1(jets[1].mom());
  if (fabs(j0.rap() + j1.rap()) / 2 > 1.11) vetoEvent;

  const double mjj = (j0 + j1).mass();
  const double chi = exp(fabs(j0.rap() - j1.rap()));
  if (chi < 16) _h_chi_dijet->fill(mjj / GeV, chi);
}


/// Normalize histograms
void finalize() {
  normalize(_h_chi_dijet);
}


Histo1DGroupPtr _h_chi_dijet;

};

RIVET_DECLARE_PLUGIN(CMS_2017_I1519995);

} ```