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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/ZFinder.hh"
namespace Rivet {
/// @brief MC validation analysis for Z events
class MC_ZINC : public Analysis {
public:
/// Default constructor
RIVET_DEFAULT_ANALYSIS_CTOR(MC_ZINC);
/// @name Analysis methods
//@{
/// Book histograms
void init() {
_dR=0.2;
if (getOption("SCHEME") == "BARE") _dR = 0.0;
_lepton=PID::ELECTRON;
if (getOption("LMODE") == "MU") _lepton = PID::MUON;
FinalState fs;
Cut cut = Cuts::abseta < 3.5 && Cuts::pT > 25*GeV;
ZFinder zfinder(fs, cut, _lepton, 65.0*GeV, 115.0*GeV, _dR, ZFinder::ClusterPhotons::NODECAY, ZFinder::AddPhotons::YES);
declare(zfinder, "ZFinder");
book(_h_Z_mass ,"Z_mass", 50, 66.0, 116.0);
book(_h_Z_pT ,"Z_pT", logspace(100, 1.0, 0.5*(sqrtS()>0.?sqrtS():14000.)/GeV));
book(_h_Z_pT_peak ,"Z_pT_peak", 25, 0.0, 25.0);
book(_h_Z_y ,"Z_y", 40, -4.0, 4.0);
book(_h_Z_phi ,"Z_phi", 25, 0.0, TWOPI);
book(_h_lepton_pT ,"lepton_pT", logspace(100, 10.0, 0.25*(sqrtS()>0.?sqrtS():14000.)/GeV));
book(_h_lepton_eta ,"lepton_eta", 40, -4.0, 4.0);
}
/// Do the analysis
void analyze(const Event & e) {
const ZFinder& zfinder = apply<ZFinder>(e, "ZFinder");
if (zfinder.bosons().size() != 1) vetoEvent;
FourMomentum zmom(zfinder.bosons()[0].momentum());
_h_Z_mass->fill(zmom.mass()/GeV);
_h_Z_pT->fill(zmom.pT()/GeV);
_h_Z_pT_peak->fill(zmom.pT()/GeV);
_h_Z_y->fill(zmom.rapidity());
_h_Z_phi->fill(zmom.phi());
for (const Particle& l : zfinder.constituents()) {
_h_lepton_pT->fill(l.pT()/GeV);
_h_lepton_eta->fill(l.eta());
}
}
/// Finalize
void finalize() {
const double s = crossSection()/picobarn/sumOfWeights();
scale(_h_Z_mass, s);
scale(_h_Z_pT, s);
scale(_h_Z_pT_peak, s);
scale(_h_Z_y, s);
scale(_h_Z_phi, s);
scale(_h_lepton_pT, s);
scale(_h_lepton_eta, s);
}
//@}
protected:
/// @name Parameters for specialised e/mu and dressed/bare subclassing
//@{
double _dR;
PdgId _lepton;
//@}
private:
/// @name Histograms
//@{
Histo1DPtr _h_Z_mass;
Histo1DPtr _h_Z_pT;
Histo1DPtr _h_Z_pT_peak;
Histo1DPtr _h_Z_y;
Histo1DPtr _h_Z_phi;
Histo1DPtr _h_lepton_pT;
Histo1DPtr _h_lepton_eta;
//@}
};
// The hooks for the plugin system
RIVET_DECLARE_PLUGIN(MC_ZINC);
}
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