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| // -*- C++ -*-
#include "Rivet/Analyses/MC_JetAnalysis.hh"
#include "Rivet/Projections/ZFinder.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_ZZJETS : public MC_JetAnalysis {
public:
/// Default constructor
MC_ZZJETS()
: MC_JetAnalysis("MC_ZZJETS", 4, "Jets")
{ }
/// @name Analysis methods
//@{
/// Book histograms
void init() {
Cut cut = Cuts::abseta < 3.5 && Cuts::pT > 25*GeV;
ZFinder zeefinder(FinalState(), cut, PID::ELECTRON, 65*GeV, 115*GeV, 0.2, ZFinder::ClusterPhotons::NODECAY, ZFinder::AddPhotons::YES);
declare(zeefinder, "ZeeFinder");
VetoedFinalState zmminput;
zmminput.addVetoOnThisFinalState(zeefinder);
ZFinder zmmfinder(zmminput, cut, PID::MUON, 65*GeV, 115*GeV, 0.2, ZFinder::ClusterPhotons::NODECAY, ZFinder::AddPhotons::YES);
declare(zmmfinder, "ZmmFinder");
VetoedFinalState jetinput;
jetinput
.addVetoOnThisFinalState(zeefinder)
.addVetoOnThisFinalState(zmmfinder);
FastJets jetpro(jetinput, FastJets::ANTIKT, 0.4);
declare(jetpro, "Jets");
// Correlations with jets
book(_h_ZZ_jet1_deta ,"ZZ_jet1_deta", 70, -7.0, 7.0);
book(_h_ZZ_jet1_dR ,"ZZ_jet1_dR", 25, 1.5, 7.0);
book(_h_Ze_jet1_dR ,"Ze_jet1_dR", 25, 0.0, 7.0);
// Global stuff
book(_h_HT ,"HT", logspace(100, 100.0, 0.5*(sqrtS()>0.?sqrtS():14000.)/GeV));
MC_JetAnalysis::init();
}
/// Do the analysis
void analyze(const Event& e) {
const double weight = 1.0;
const ZFinder& zeefinder = apply<ZFinder>(e, "ZeeFinder");
if (zeefinder.bosons().size() != 1) vetoEvent;
const ZFinder& zmmfinder = apply<ZFinder>(e, "ZmmFinder");
if (zmmfinder.bosons().size() != 1) vetoEvent;
// Z momenta
const FourMomentum& zee = zeefinder.bosons()[0].momentum();
const FourMomentum& zmm = zmmfinder.bosons()[0].momentum();
const FourMomentum zz = zee + zmm;
// Lepton momenta
const FourMomentum& ep = zeefinder.constituents()[0].momentum();
const FourMomentum& em = zeefinder.constituents()[1].momentum();
const FourMomentum& mp = zmmfinder.constituents()[0].momentum();
const FourMomentum& mm = zmmfinder.constituents()[1].momentum();
const Jets& jets = apply<FastJets>(e, "Jets").jetsByPt(_jetptcut);
if (jets.size() > 0) {
const FourMomentum j0 = jets[0].momentum();
_h_ZZ_jet1_deta->fill(zz.eta()-j0.eta(), weight);
_h_ZZ_jet1_dR->fill(deltaR(zz, j0), weight);
_h_Ze_jet1_dR->fill(deltaR(ep, j0), weight);
}
double HT = ep.pT() + em.pT() + mp.pT() + mm.pT();
for (const Jet& jet : jets) HT += jet.pT();
if (HT > 0.0) _h_HT->fill(HT/GeV, weight);
MC_JetAnalysis::analyze(e);
}
/// Finalize
void finalize() {
const double s = crossSection()/picobarn/sumOfWeights();
scale(_h_ZZ_jet1_deta, s);
scale(_h_ZZ_jet1_dR, s);
scale(_h_Ze_jet1_dR, s);
scale(_h_HT, s);
MC_JetAnalysis::finalize();
}
//@}
private:
/// @name Histograms
//@{
Histo1DPtr _h_ZZ_jet1_deta;
Histo1DPtr _h_ZZ_jet1_dR;
Histo1DPtr _h_Ze_jet1_dR;
Histo1DPtr _h_HT;
//@}
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(MC_ZZJETS);
}
|