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MC_GENSTUDY_JETCHARGE.cc
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MC_GENSTUDY_JETCHARGE.cc
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// -*- C++ -*-
//System includes
#include <map>
#include <algorithm>
// BOOST 2012 Substructure methods
#include "BOOSTFastJets.h"
//Generator Interfaces
#include "HepMC/GenParticle.h"
#include "HepMC/GenEvent.h"
//Rivet framework
#include "Rivet/Analysis.hh"
#include "Rivet/RivetAIDA.hh"
#include "Rivet/Tools/Logging.hh"
#include "Rivet/Tools/ParticleIdUtils.hh"
//Projections
#include "Rivet/Projections/FinalState.hh"
#include "Rivet/Projections/WFinder.hh"
#include "Rivet/Projections/FastJets.hh"
//#include "Rivet/Projections/MissingMomentum.hh"
// Histogram booking
#include "LWH/Histogram1D.h"
//#include "LWH/Histogram2D.h"
typedef std::map<std::string,AIDA::IHistogram1D*> BookedHistos;
namespace Rivet
{
/// Generic analysis looking at various distributions of final state particles
class MC_GENSTUDY_JETCHARGE : public Analysis
{
public:
/// Constructor
MC_GENSTUDY_JETCHARGE()
: Analysis("MC_GENSTUDY_JETCHARGE")
{
for(unsigned int i=0; i < 4; i++) _nPassing[i]=0;
}
/// @name Analysis methods
//@{
/// Book histograms and initialise projections before the run
void init()
{
// Projections
const FinalState fs;
addProjection(fs, "FS");
std::vector<std::pair<double, double > > muonEtaRanges;
muonEtaRanges.push_back(make_pair(-2.4,2.4));
WFinder muWFinder(fs, muonEtaRanges, 25*GeV, MUON,
40*GeV,1000*GeV,25*GeV,0.6,true,false,80.4,true);
// Tag a W in the event, focus on jets that don't come from the W decay.
addProjection(muWFinder,"muWFinder");
FastJets JetProjection(muWFinder.remainingFinalState(),FastJets::ANTIKT, 0.6); //FastJets::KT,0.7
addProjection(JetProjection,"Jets");
///////////////
// Histograms
///////////////
_histograms["JetMult"] = bookHistogram1D("JetMult" , 6, -0.5, 5.5);
//Jet Kinematics
_histograms["JetPt"] = bookHistogram1D("JetPt" , 50, 33, 300);
_histograms["JetE"] = bookHistogram1D("JetE" , 25, 20, 300);
_histograms["JetEta"] = bookHistogram1D("JetEta" , 25, -2, 2);
_histograms["JetRapidity"] = bookHistogram1D("JetRapidity" , 25, -2, 2);
//_histograms["JetPhi"] = bookHistogram1D("JetPhi" , 25, 0, TWOPI);
_histograms["JetMass"] = bookHistogram1D("JetMass" , 100, 0, 40);
//_histograms["Jet2Mass"] = bookHistogram1D("Jet2Mass" , 100, 0, 100);
//_histograms["Jet3Mass"] = bookHistogram1D("Jet3Mass" , 100, 0, 100);
_histograms["SubJetMult"] = bookHistogram1D("SubJetMult" , 15, -0.5, 29.5);
_histograms["SubJet2Mass"] = bookHistogram1D("SubJet2Mass" , 100, 0, 35);
_histograms["SubJet3Mass"] = bookHistogram1D("SubJet3Mass" , 100, 0, 45);
_histograms["SubJetDeltaR"] = bookHistogram1D("SubJetDeltaR" , 50, 0, 1.0);
_histograms["SubJetMass"] = bookHistogram1D("SubJetMass" , 100, 0, 12);
_histograms["SubJetSumEt"] = bookHistogram1D("SubJetSumEt" , 30, 0, 175);
//Jet Charge Histos
_histograms["WCharge"] = bookHistogram1D("WCharge" , 3, -1.5, 1.5);
_histograms["WJetChargeK5"] = bookHistogram1D("WJetChargeK5" , 50, -3, 3);
_histograms["QuarkJetChargeK5"] = bookHistogram1D("QuarkJetChargeK5" , 50, -3, 3);
_histograms["GluonJetChargeK5"] = bookHistogram1D("GluonJetChargeK5" , 50, -3, 3);
_histograms["WJetChargeK3"] = bookHistogram1D("WJetChargeK3" , 50, -3, 3);
_histograms["QuarkJetChargeK3"] = bookHistogram1D("QuarkJetChargeK3" , 50, -3, 3);
_histograms["GluonJetChargeK3"] = bookHistogram1D("GluonJetChargeK3" , 50, -3, 3);
_histograms["QuarkNegTwoThirdsK5"]= bookHistogram1D("QuarkNegTwoThirdsK5" , 50, -3, 3);
_histograms["QuarkNegOneThirdK5"] = bookHistogram1D("QuarkNegOneThirdK5" , 50, -3, 3);
_histograms["QuarkOneThirdK5"] = bookHistogram1D("QuarkOneThirdK5" , 50, -3, 3);
_histograms["QuarkTwoThirdsK5"] = bookHistogram1D("QuarkTwoThirdsK5" , 50, -3, 3);
_histograms["QuarkNegTwoThirdsK3"]= bookHistogram1D("QuarkNegTwoThirdsK3" , 50, -3, 3);
_histograms["QuarkNegOneThirdK3"] = bookHistogram1D("QuarkNegOneThirdK3" , 50, -3, 3);
_histograms["QuarkOneThirdK3"] = bookHistogram1D("QuarkOneThirdK3" , 50, -3, 3);
_histograms["QuarkTwoThirdsK3"] = bookHistogram1D("QuarkTwoThirdsK3" , 50, -3, 3);
_histograms["ChargeSignPurity"] = bookHistogram1D("ChargeSignPurity" ,50,33,300);
_histograms["QuarkJetEta"] = bookHistogram1D("QuarkJetEta" , 25, -2, 2);
_histograms["GluonJetEta"] = bookHistogram1D("GluonJetEta" , 25, -2, 2);
_histograms["QuarkJetPt"] = bookHistogram1D("QuarkJetPt" ,50,33,300);
_histograms["GluonJetPt"] = bookHistogram1D("GluonJetPt" ,50,33,300);
_histograms["JetPullTheta"] = bookHistogram1D("JetPullTheta" ,50,-PI,PI);
_histograms["JetPullMag"] = bookHistogram1D("JetPullMag" ,50,0,0.04);
//_hist2DJetChargeWPt = bookHistogram2D("JetChargeVsWPt" ,50,-0.3,0.3,50,24,300);
_histograms["TruthDeltaR"] = bookHistogram1D("TruthDeltaR" ,50,0,0.7);
_histograms["TruthPdgID"] = bookHistogram1D("TruthPdgID" ,7,-0.5,6.5);
//Dipolarity
_histograms["Dipolarity"] = bookHistogram1D("Dipolarity" ,50,0.0,1.5);
//N-subjettiness histos
_histograms["JetMassFilt"] = bookHistogram1D("JetMassFilt" , 60, 0, 50);
_histograms["JetMassTrim"] = bookHistogram1D("JetMassTrim" , 60, 0, 50);
_histograms["JetMassPrune"] = bookHistogram1D("JetMassPrune" , 60, 0, 20);
_histograms["NSubJettiness"] = bookHistogram1D("NSubJettiness" , 40, -0.005, 1.005);
_histograms["NSubJettiness1Iter"] = bookHistogram1D("NSubJettiness1Iter" , 40, -0.005, 1.005);
_histograms["NSubJettiness2Iter"] = bookHistogram1D("NSubJettiness2Iter" , 40, -0.005, 1.005);
}
/// quickly calculate standard deviation of pt distribution in jets
virtual void pt_stddev(const PseudoJets& jets, double& mean,double& stddev,const double N)
{
foreach(const fastjet::PseudoJet& jet, jets)
mean+=jet.pt();
mean=mean/N;
foreach(const fastjet::PseudoJet& jet, jets)
stddev+=((jet.pt()-mean)*(jet.pt()-mean));
stddev=stddev/N;
}
virtual void fillChargeHistograms(const fastjet::PseudoJet& jet, const FastJets& JetProjection,
const double k, const int wCharge,
const double weight, const int pdgId)
{
stringstream kStr;
kStr<<"K"<<static_cast<int>(k*10);
const double jetCharge = wCharge*JetCharge(JetProjection,jet,k,1*GeV);
_histograms["WJetCharge"+kStr.str()]->fill(jetCharge,weight);
if(abs(pdgId) < 7)
{
_histograms["QuarkJetCharge"+kStr.str()]->fill(jetCharge,weight);
switch(wCharge*PID::threeCharge(pdgId))
{
case -2:
_histograms["QuarkNegTwoThirds"+kStr.str()]->fill(jetCharge,weight);
break;
case -1:
_histograms["QuarkNegOneThird"+kStr.str()]->fill(jetCharge,weight);
break;
case 1:
_histograms["QuarkOneThird"+kStr.str()]->fill(jetCharge,weight);
break;
case 2:
_histograms["QuarkTwoThirds"+kStr.str()]->fill(jetCharge,weight);
break;
}
}
else if(abs(pdgId) == 21)
{
_histograms["GluonJetCharge"+kStr.str()]->fill(jetCharge,weight);
}
}
virtual void analyzeSubJets(const fastjet::PseudoJet& jet,const double weight)
{
const double ptmin=0.5*GeV;
double sumEt=0.0;
fastjet::ClusterSequence clusterSeq(jet.validated_cs()->constituents(jet),fastjet::JetDefinition(fastjet::kt_algorithm,0.6));
PseudoJets subJets=clusterSeq.exclusive_jets_up_to(3);
fastjet::ClusterSequence antiKTClusterSeq(jet.validated_cs()->constituents(jet),fastjet::JetDefinition(fastjet::antikt_algorithm,0.1));
PseudoJets smallSubJets=antiKTClusterSeq.inclusive_jets(ptmin);
int smallJetMult = smallSubJets.size();
_histograms["SubJetMult"]->fill(smallJetMult,weight);
unsigned int nSubJets=subJets.size();
if(nSubJets==3)
_histograms["SubJet3Mass"]->fill((subJets.at(0)+subJets.at(1)+subJets.at(2)).m(),weight);
for(unsigned int j=0; j!=nSubJets; ++j)
{
sumEt+=subJets.at(j).Et();
_histograms["SubJetMass"]->fill(subJets.at(j).m());
for(unsigned int k=(j+1); k!=nSubJets; ++k)
{
_histograms["SubJetDeltaR"]->fill(subJets.at(j).delta_R(subJets.at(k)),weight);
_histograms["SubJet2Mass"]->fill((subJets.at(j)+subJets.at(k)).m(),weight);
}
}
_histograms["SubJetSumEt"]->fill(sumEt,weight);
}
/// Perform the per-event analysis
void analyze(const Event& event)
{
_nPassing[0]++;
const WFinder& muWFinder = applyProjection<WFinder>(event,"muWFinder");
if (muWFinder.bosons().size() != 1)
vetoEvent;
_nPassing[1]++;
//Dipolarity(0.,0.);
const double weight = event.weight();
const FastJets& JetProjection=applyProjection<FastJets>(event, "Jets");
const PseudoJets& jets = JetProjection.pseudoJetsByPt(35.0*GeV);
if (jets.size() > 0)
{
_nPassing[2]++;
const unsigned int jetMult=jets.size();
_histograms["JetMult"]->fill(jetMult);
/// Rather than loop over all jets, just take the first hard
/// one, Make sure entire jet is within fiducial volume
if(jets.front().eta() > -(2.5-0.6) && jets.front().eta() < (2.5-0.6))
{
if(jets.front().has_valid_cs())
analyzeSubJets(jets.front(),weight);
foreach (const fastjet::PseudoJet& jet, jets)
{
_histograms["JetMassFilt"]->fill(Filter(JetProjection.clusterSeq(),jet, FastJets::CAM, 3, 0.3).m(), weight);
_histograms["JetMassTrim"]->fill(Trimmer(JetProjection.clusterSeq(),jet, FastJets::CAM, 0.03, 0.3).m(), weight);
_histograms["JetMassPrune"]->fill(Pruner(JetProjection.clusterSeq(),jet, FastJets::CAM, 0.4, 0.1).m(), weight);
PseudoJets constituents = jet.constituents();
if (constituents.size() > 10)
{
PseudoJets axes(GetAxes(JetProjection.clusterSeq(), 2, constituents, FastJets::CAM, 0.5));
_histograms["NSubJettiness"]->fill(TauValue(2, 1, constituents, axes), weight);
UpdateAxes(2, constituents, axes);
_histograms["NSubJettiness1Iter"]->fill(TauValue(2, 1, constituents, axes), weight);
UpdateAxes(2, constituents, axes);
_histograms["NSubJettiness2Iter"]->fill(TauValue(2, 1, constituents, axes), weight);
}
}
_nPassing[3]++;
const double wCharge=PID::charge(muWFinder.bosons().front().pdgId());
//const double jetCharge=wCharge*JetProjection.JetCharge(jets.front(),0.5,1*GeV);
const std::pair<double,double> tvec=JetPull(JetProjection,jets.front());
_histograms["Dipolarity"]->fill(Dipolarity(jets.front()),weight);
_histograms["JetMass"]->fill(jets.front().m(),weight);
_histograms["JetPt"]->fill(jets.front().pt(),weight);
_histograms["JetE"]->fill(jets.front().E(),weight);
_histograms["JetEta"]->fill(jets.front().eta(),weight);
_histograms["JetRapidity"]->fill(jets.front().rapidity(),weight);
//histograms["JetPhi"]->fill(jets.front().phi(),weight);
//_hist2DJetChargeWPt->fill(jetCharge,muWFinder.bosons().front().momentum().pT(),weight);
//_histograms["WJetCharge"]->fill(jetCharge,weight);
_histograms["WCharge"]->fill(wCharge,weight);
_histograms["JetPullMag"]->fill(tvec.first,weight);
if(tvec.first > 0)
{
_histograms["JetPullTheta"]->fill(tvec.second,weight);
}
HepMC::GenParticle* truthParton=NULL;
double truthDelR(0);
foreach (HepMC::GenParticle* const p, particles(event.genEvent()))
{
if((p->pdg_id() != 21) and (abs(p->pdg_id()) > 6)) continue;
//This may be slow, but its the path of minimal obfuscation
const double delR = jets.front().delta_R(fastjet::PseudoJet(p->momentum().px(),
p->momentum().py(),
p->momentum().pz(),
p->momentum().e()));
if(truthParton==NULL)
{
truthDelR = delR;
truthParton = p;
}
else if(delR < 0.6 && truthParton->momentum().perp() < p->momentum().perp())
{
//if(null) assign truthParton, updateDelR
truthDelR = delR;
truthParton = p;
}
}
_histograms["TruthDeltaR"]->fill(truthDelR,weight);
truthParton = NULL;
foreach (HepMC::GenParticle* const p, particles(event.genEvent()))
{
//if(null) assign truthParton, updateDelR
if((p->pdg_id() != 21) and (abs(p->pdg_id()) > 6)) continue;
//This may be slow, but its the path of minimal obfuscation
const double delR = jets.front().delta_R(fastjet::PseudoJet(p->momentum().px(),
p->momentum().py(),
p->momentum().pz(),
p->momentum().e()));
if(truthParton==NULL)
{
truthDelR = delR;
truthParton = p;
}
else if(delR < 0.4 && truthParton->momentum().perp() < p->momentum().perp())
{
//if(null) assign truthParton, updateDelR
truthDelR = delR;
truthParton = p;
}
}
const int pdgId = truthParton->pdg_id();
_histograms["TruthPdgID"]->fill((abs(pdgId)==21) ? 0 :abs(pdgId), weight);
fillChargeHistograms(jets.front(), JetProjection, 0.3, static_cast<int>(wCharge), weight, pdgId);
fillChargeHistograms(jets.front(), JetProjection, 0.5, static_cast<int>(wCharge), weight, pdgId);
if(abs(pdgId) < 7)
{
_histograms["QuarkJetPt"]->fill(jets.front().pt(),weight);
_histograms["QuarkJetEta"]->fill(jets.front().eta(),weight);
if(wCharge*PID::charge(pdgId) < 0.0)
{
_histograms["ChargeSignPurity"]->fill(jets.front().pt(),weight);
}
}
else if(pdgId == 21)
{
_histograms["GluonJetPt"]->fill(jets.front().pt(),weight);
_histograms["GluonJetEta"]->fill(jets.front().eta(),weight);
}
}
}
else
{
vetoEvent;
}
}
/// Finalize
void finalize()
{
cout<<"Cut summary: "<<endl;
cout<<"| Inclusive | "<<_nPassing[0]<< " | "<<endl;
cout<<"| Found W | "<<_nPassing[1]<< " | "<<endl;
cout<<"| >1 Jet | "<<_nPassing[2]<< " | "<<endl;
cout<<"| Fiducial | "<<_nPassing[3]<< " | "<<endl;
cout<<"Mean Jet Charge (k=0.3): "<<_histograms["WJetChargeK3"]->mean()<<" +/- "<<_histograms["WJetChargeK3"]->rms()<<endl;
cout<<"Mean Jet Charge (k=0.5): "<<_histograms["WJetChargeK5"]->mean()<<" +/- "<<_histograms["WJetChargeK5"]->rms()<<endl;
// foreach(BookedHistos::value_type H,_histograms){
// normalize(H.second);
// }
// normalize(_hist2DJetChargeWPt);
}
//@}
private:
///@param _histograms Indexed by histogram name for easy management
///until Rivet Autobooking takes over, allows any number of
///histograms to be added "on the fly" in the init() method.
//@{
BookedHistos _histograms;
//AIDA::IHistogram2D *_hist2DJetChargeWPt;
//@}
/// @param _nPassing Event count for efficiency studies
//@{
int _nPassing[4];
//@}
};
// The hook for the plugin system
DECLARE_RIVET_PLUGIN(MC_GENSTUDY_JETCHARGE);
}