Rivet analyses

title: MC_JETTAGS

Monte Carlo validation analysis for ideal heavy flavour tagging observables

Experiment: ()

Status: VALIDATED

Authors: - Andy Buckley

References: none listed

Beams: * *

Beam energies: ANY

Run details: - Run any events which will produce jets above 20 GeV. Of most interest for processes where c and b hadrons can be produced (either hard or soft) of course!

Plots to study theoretical tagging of heavy flavour hadrons in jets.

Source code:MC_JETTAGS.cc

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

include "Rivet/Analysis.hh"

include "Rivet/Projections/FastJets.hh"

include "Rivet/Projections/FinalState.hh"

namespace Rivet {

/// @brief MC validation analysis for jet events class MC_JETTAGS : public Analysis { public:

MC_JETTAGS()
    : Analysis("MC_JETTAGS") { }


void init() {
  FinalState fs;
  declare(FastJets(fs, JetAlg::ANTIKT, 0.4), "Jets04");
  declare(FastJets(fs, JetAlg::ANTIKT, 0.6), "Jets06");

  book(_h_numBTagsPerJet[0], "numBTagsPer04Jet", 5, -0.5, 4.5);
  book(_h_numBTagsPerJet[1], "numBTagsPer06Jet", 5, -0.5, 4.5);
  book(_h_numCTagsPerJet[0], "numCTagsPer04Jet", 5, -0.5, 4.5);
  book(_h_numCTagsPerJet[1], "numCTagsPer06Jet", 5, -0.5, 4.5);
  book(_h_numTauTagsPerJet[0], "numTauTagsPer04Jet", 5, -0.5, 4.5);
  book(_h_numTauTagsPerJet[1], "numTauTagsPer06Jet", 5, -0.5, 4.5);
}


void analyze(const Event& event) {

  const Jets jets04 = apply<FastJets>(event, "Jets04").jetsByPt(Cuts::pT > 20 * GeV);
  const Jets jets06 = apply<FastJets>(event, "Jets06").jetsByPt(Cuts::pT > 20 * GeV);

  for (const Jet& j : jets04) {
    _h_numBTagsPerJet[0]->fill(j.bTags().size());
    _h_numCTagsPerJet[0]->fill(j.cTags().size());
    _h_numTauTagsPerJet[0]->fill(j.tauTags().size());
  }
  for (const Jet& j : jets06) {
    _h_numBTagsPerJet[1]->fill(j.bTags().size());
    _h_numCTagsPerJet[1]->fill(j.cTags().size());
    _h_numTauTagsPerJet[1]->fill(j.tauTags().size());
  }
}


void finalize() {
  for (size_t i = 0; i < 2; ++i) {
    normalize(_h_numBTagsPerJet[i]);
    normalize(_h_numCTagsPerJet[i]);
    normalize(_h_numTauTagsPerJet[i]);
  }
}

private:

Histo1DPtr _h_numBTagsPerJet[2], _h_numCTagsPerJet[2], _h_numTauTagsPerJet[2];

};

RIVET_DECLARE_PLUGIN(MC_JETTAGS);

} ```