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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/ChargedFinalState.hh"
namespace Rivet {
/// Analysis looking at various distributions of final state particles
class MC_FSPARTICLES : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(MC_FSPARTICLES);
/// @name Analysis methods
//@{
/// Book histograms and initialise projections before the run
void init() {
// Projections
FinalState fs(Cuts::abseta < 5 && Cuts::pT > 500*MeV);
declare(fs, "FS");
declare(ChargedFinalState(fs), "CFS");
// Histograms
/// @todo Choose E/pT ranged based on input energies... can't do anything about kin. cuts, though
book(_histMult , "Mult", 100, -0.5, 199.5);
book(_histMultCh , "MultCh", 100, -0.5, 199.5);
book(_histPt , "Pt", 300, 0, 30);
book(_histPtCh , "PtCh", 300, 0, 30);
book(_histE , "E", 100, 0, 200);
book(_histECh , "ECh", 100, 0, 200);
book(_histEtaSumEt , "EtaSumEt", 25, 0, 5);
book(_histEta , "Eta", 50, -5, 5);
book(_histEtaCh , "EtaCh", 50, -5, 5);
book(_tmphistEtaPlus, "TMP/EtaPlus", 25, 0, 5);
book(_tmphistEtaMinus, "TMP/EtaMinus", 25, 0, 5);
book(_tmphistEtaChPlus, "TMP/EtaChPlus", 25, 0, 5);
book(_tmphistEtaChMinus, "TMP/EtaChMinus", 25, 0, 5);
book(_histRapidity , "Rapidity", 50, -5, 5);
book(_histRapidityCh , "RapidityCh", 50, -5, 5);
book(_tmphistRapPlus, "TMP/RapPlus", 25, 0, 5);
book(_tmphistRapMinus, "TMP/RapMinus", 25, 0, 5);
book(_tmphistRapChPlus, "TMP/RapChPlus", 25, 0, 5);
book(_tmphistRapChMinus, "TMP/RapChMinus", 25, 0, 5);
book(_histPhi , "Phi", 50, 0, TWOPI);
book(_histPhiCh , "PhiCh", 50, 0, TWOPI);
book(_histEtaPMRatio , "EtaPMRatio");
book(_histEtaChPMRatio , "EtaChPMRatio");
book(_histRapidityPMRatio , "RapidityPMRatio");
book(_histRapidityChPMRatio , "RapidityChPMRatio");
}
/// Perform the per-event analysis
void analyze(const Event& event) {
// Charged + neutral final state
const FinalState& fs = apply<FinalState>(event, "FS");
MSG_DEBUG("Total multiplicity = " << fs.size());
_histMult->fill(fs.size());
for (const Particle& p : fs.particles()) {
_histEta->fill(p.eta());
_histEtaSumEt->fill(p.abseta(), p.Et());
(p.eta() > 0 ? _tmphistEtaPlus : _tmphistEtaMinus)->fill(p.abseta());
//
_histRapidity->fill(p.rap());
(p.rap() > 0 ? _tmphistRapPlus : _tmphistRapMinus)->fill(p.absrap());
//
_histPt->fill(p.pT()/GeV);
_histE->fill(p.E()/GeV);
_histPhi->fill(p.phi());
}
// Same for the charged FS particles only
const FinalState& cfs = apply<FinalState>(event, "CFS");
MSG_DEBUG("Total charged multiplicity = " << cfs.size());
_histMultCh->fill(cfs.size());
for (const Particle& p : cfs.particles()) {
_histEtaCh->fill(p.eta());
(p.eta() > 0 ? _tmphistEtaChPlus : _tmphistEtaChMinus)->fill(p.abseta());
//
_histRapidityCh->fill(p.rap());
(p.rap() > 0 ? _tmphistRapChPlus : _tmphistRapChMinus)->fill(p.absrap());
//
_histPtCh->fill(p.pT()/GeV);
_histECh->fill(p.E()/GeV);
_histPhiCh->fill(p.phi());
}
}
/// Finalize
void finalize() {
normalize(_histMult); normalize(_histEta); normalize(_histRapidity);
normalize(_histPt); normalize(_histE); normalize(_histPhi);
normalize(_histMultCh); normalize(_histEtaCh); normalize(_histRapidityCh);
normalize(_histPtCh); normalize(_histECh); normalize(_histPhiCh);
divide(_tmphistEtaPlus, _tmphistEtaMinus, _histEtaPMRatio);
divide(_tmphistEtaChPlus, _tmphistEtaChMinus, _histEtaChPMRatio);
divide(_tmphistRapPlus, _tmphistRapMinus, _histRapidityPMRatio);
divide(_tmphistRapChPlus, _tmphistRapChMinus, _histRapidityChPMRatio);
}
//@}
private:
/// @name Histograms
//@{
Histo1DPtr _histMult, _histEta, _histRapidity, _histPt, _histE, _histPhi;
Histo1DPtr _histMultCh, _histEtaCh, _histRapidityCh, _histPtCh, _histECh, _histPhiCh;
Profile1DPtr _histEtaSumEt;
Scatter2DPtr _histEtaPMRatio, _histEtaChPMRatio, _histRapidityPMRatio, _histRapidityChPMRatio;
//@}
/// @name Temporary histos used to calculate +/- rapidity ratio plots
//@{
Histo1DPtr _tmphistEtaPlus, _tmphistEtaMinus, _tmphistEtaChPlus, _tmphistEtaChMinus;
Histo1DPtr _tmphistRapPlus, _tmphistRapMinus, _tmphistRapChPlus, _tmphistRapChMinus;
//@}
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(MC_FSPARTICLES);
}
|