Rivet analyses

title: MC_ZKTSPLITTINGS

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

Experiment: ()

Status: VALIDATED

Authors: - Frank Siegert - Christian Gutschow

References: none listed

Beams: * *

Beam energies: ANY

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

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

Source code:MC_ZKTSPLITTINGS.cc

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

include "Rivet/Analyses/MC_KTSPLITTINGS_BASE.hh"

include "Rivet/Projections/DileptonFinder.hh"

include "Rivet/Projections/FastJets.hh"

namespace Rivet {

/// @brief MC validation analysis for Z + jets events class MC_ZKTSPLITTINGS : public MC_KTSPLITTINGS_BASE { public:

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


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

/// Book histograms
void init() {
  _dR = (getOption("SCHEME") == "BARE") ? 0.0 : 0.2;
  _lepton = (getOption("LMODE") == "MU") ? PID::MUON : PID::ELECTRON;

  // set FS cuts from input options
  const double etacut = getOption<double>("ABSETALMAX", 3.5);
  const double ptcut = getOption<double>("PTLMIN", 25.);

  Cut cut = Cuts::abseta < etacut && Cuts::pT > ptcut * GeV;
  DileptonFinder zfinder(91.2 * GeV, _dR, cut && Cuts::abspid == _lepton,
                         Cuts::massIn(65 * GeV, 115 * GeV));
  declare(zfinder, "DileptonFinder");

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

  FastJets jetpro(zfinder.remainingFinalState(), JetAlg::KT, R);
  declare(jetpro, "Jets");

  MC_KTSPLITTINGS_BASE::init();
}


/// Do the analysis
void analyze(const Event& e) {
  const DileptonFinder& zfinder = apply<DileptonFinder>(e, "DileptonFinder");
  if (zfinder.bosons().size() != 1) vetoEvent;

  MC_KTSPLITTINGS_BASE::analyze(e);
}


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

/// @}

protected:

/// @name Parameters for specialised e/mu and dressed/bare subclassing
/// @{
double _dR;
PdgId _lepton;
/// @}

};

RIVET_DECLARE_PLUGIN(MC_ZKTSPLITTINGS);

} ```