Rivet analyses

title: 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: - arXiv: 1803.08030 - CMS EXO-16-046

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

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

include "Rivet/Analysis.hh"

include "Rivet/Projections/FastJets.hh"

namespace Rivet {

class CMS_2018_I1663452 : public Analysis { public:

RIVET_DEFAULT_ANALYSIS_CTOR(CMS_2018_I1663452);

void init() {
  FinalState fs;
  FastJets antikt(fs, JetAlg::ANTIKT, 0.4);
  declare(antikt, "ANTIKT");
  book(_h_chi_dijet, {2400., 3000., 4200., 4800., 5400., 6000.});
  for (auto& b : _h_chi_dijet->bins()) {
    book(b, _h_chi_dijet->numBins() - b.index() + 1, 1, 1);
  }
}

void analyze(const Event& event) {
  const Jets& jets = apply<JetFinder>(event, "ANTIKT").jetsByPt();
  if (jets.size() < 2) vetoEvent;
  FourMomentum j0(jets[0].momentum());
  FourMomentum j1(jets[1].momentum());
  double y0 = j0.rapidity();
  double y1 = j1.rapidity();
  if (fabs(y0 + y1) / 2. > 1.11) vetoEvent;
  double mjj = FourMomentum(j0 + j1).mass();
  double chi = exp(fabs(y0 - y1));
  if (chi < 16.) _h_chi_dijet->fill(mjj, chi);
}


void finalize() {
  normalize(_h_chi_dijet);
}

private:

Histo1DGroupPtr _h_chi_dijet;

};

RIVET_DECLARE_PLUGIN(CMS_2018_I1663452);

} ```