Rivet analyses

title: MC_ZZKTSPLITTINGS

Monte Carlo validation observables for $Z[e^+ \, e^-]Z[\mu^+ \, \mu^-]$ + jets production

Experiment: ()

Status: VALIDATED

Authors: - Frank Siegert

References: none listed

Beams: * *

Beam energies: ANY

Run details: - $ZZ$ + jets analysis. Needs mass cut on lepton pairs to avoid photon singularity, e.g. a min range of $66 < m_{ee} < 116$ GeV

Monte Carlo validation observables for $Z[e^+ \, e^-]Z[\mu^+ \, \mu^-]$ + jets production

Source code:MC_ZZKTSPLITTINGS.cc

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

include "Rivet/Analyses/MC_KTSPLITTINGS_BASE.hh"

include "Rivet/Projections/DileptonFinder.hh"

include "Rivet/Projections/FastJets.hh"

include "Rivet/Projections/VetoedFinalState.hh"

namespace Rivet {

/// @brief MC validation analysis for Z[ee]Z[mumu] + jets events class MC_ZZKTSPLITTINGS : public MC_KTSPLITTINGS_BASE { public:

/// Default constructor
MC_ZZKTSPLITTINGS()
    : MC_KTSPLITTINGS_BASE("MC_ZZKTSPLITTINGS", 4, "Jets") { }


/// @name Analysis methods
/// @{

/// Book histograms
void init() {

  // set FS cuts from input options
  const double etaecut = getOption<double>("ABSETAEMAX", 3.5);
  const double ptecut = getOption<double>("PTEMIN", 25.);
  Cut cute = Cuts::abseta < etaecut && Cuts::pT > ptecut * GeV;
  DileptonFinder zeefinder(91.2 * GeV, 0.2, cute && Cuts::abspid == PID::ELECTRON,
                           Cuts::massIn(65 * GeV, 115 * GeV));
  declare(zeefinder, "ZeeFinder");

  VetoedFinalState zmminput;
  zmminput.vetoFinalState(zeefinder);

  // set FS cuts from input options
  const double etamucut = getOption<double>("ABSETAMUMAX", 3.5);
  const double ptmucut = getOption<double>("PTMUMIN", 25.);
  Cut cutmu = Cuts::abseta < etamucut && Cuts::pT > ptmucut * GeV;
  DileptonFinder zmmfinder(PromptFinalState(zmminput), 91.2 * GeV, 0.2,
                           cutmu && Cuts::abspid == PID::MUON, Cuts::massIn(65 * GeV, 115 * GeV));
  declare(zmmfinder, "ZmmFinder");

  VetoedFinalState jetinput;
  jetinput.addVetoOnThisFinalState(zeefinder).addVetoOnThisFinalState(zmmfinder);

  // set clustering radius from input option
  const double R = getOption<double>("R", 0.6);

  FastJets jetpro(jetinput, JetAlg::KT, R);
  declare(jetpro, "Jets");

  MC_KTSPLITTINGS_BASE::init();
}


/// Do the analysis
void analyze(const Event& e) {
  const DileptonFinder& zeefinder = apply<DileptonFinder>(e, "ZeeFinder");
  if (zeefinder.bosons().size() != 1) vetoEvent;
  const DileptonFinder& zmmfinder = apply<DileptonFinder>(e, "ZmmFinder");
  if (zmmfinder.bosons().size() != 1) vetoEvent;
  MC_KTSPLITTINGS_BASE::analyze(e);
}


/// Finalize
void finalize() {
  MC_KTSPLITTINGS_BASE::finalize();
}

/// @}

};

RIVET_DECLARE_PLUGIN(MC_ZZKTSPLITTINGS);

} ```