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lethuill |
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#include "../interface/ZeeVertexAnalyzer.h"
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using namespace std;
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using namespace reco;
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using namespace edm;
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ZeeVertexAnalyzer::ZeeVertexAnalyzer(const edm::ParameterSet& iConfig, const edm::ParameterSet& producersNames, int verbosity):verbosity_(verbosity), config_(iConfig)
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{
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allowMissingCollection_ = producersNames.getUntrackedParameter<bool>("allowMissingCollection", false);
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primaryVertexProducer_ = producersNames.getParameter<edm::InputTag>("primaryVertexProducer");
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beamSpotProducer_ = producersNames.getParameter<edm::InputTag>("beamSpotProducer");
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trackProducer_ = producersNames.getParameter<edm::InputTag>("trackProducer");
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electronProducer_ = producersNames.getParameter<edm::InputTag>("electronProducer");
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}
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ZeeVertexAnalyzer::~ZeeVertexAnalyzer()
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{
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}
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bool ZeeVertexAnalyzer::getVertices(const edm::Event& iEvent, const edm::EventSetup& iSetup, TClonesArray* rootVertices)
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{
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using namespace edm;
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int iRootVertex = 0;
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Very simple Zee selection: at least 2 electrons pT>10 GeV, |eta|<2.5, 60 < Mee < 120
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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edm::Handle< reco::GsfElectronCollection > electrons;
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iEvent.getByLabel(electronProducer_, electrons);
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int nElectrons = electrons->size();
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if(verbosity_>4) std::cout << std::endl << " Number of electrons = " << nElectrons << " (" << electronProducer_.label() << " producer)" << std::endl;
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if(nElectrons<2) return false;
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// Highest ET electron
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Float_t maxPt = 0;
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unsigned int iElectron1 = 999999;
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for (unsigned int j=0; j<electrons->size(); j++)
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{
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const reco::GsfElectron* electron = & (electrons->at(j));
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if ( electron->pt() > maxPt && abs(electron->eta()) < 2.5 )
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{
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maxPt = electron->pt();
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iElectron1 = j;
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}
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}
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if(iElectron1==999999) return false;
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// Second highest ET electron
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maxPt = 0;
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unsigned int iElectron2 = 999999;
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for (unsigned int j=0; j<electrons->size(); j++)
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{
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const reco::GsfElectron* electron = & (electrons->at(j));
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if ( electron->pt() > maxPt && abs(electron->eta()) < 2.5 && j!=iElectron1 )
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{
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maxPt = electron->pt();
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iElectron2 = j;
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}
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}
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if(iElectron2==999999) return false;
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// Z mass
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ROOT::Math::LorentzVector<ROOT::Math::PxPyPzE4D<double> > p4Electron1= (electrons->at(iElectron1)).p4();
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ROOT::Math::LorentzVector<ROOT::Math::PxPyPzE4D<double> > p4Electron2= (electrons->at(iElectron2)).p4();
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ROOT::Math::LorentzVector<ROOT::Math::PxPyPzE4D<double> > p4Z = p4Electron1 + p4Electron2;
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if(verbosity_>4) std::cout << " Electron 1 - (Et,eta,phi)=(" << electrons->at(iElectron1).pt() << "," << electrons->at(iElectron1).eta() << "," << electrons->at(iElectron1).phi() << ")" << std::endl;
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if(verbosity_>4) std::cout << " Electron 2 - (Et,eta,phi)=(" << electrons->at(iElectron2).pt() << "," << electrons->at(iElectron2).eta() << "," << electrons->at(iElectron2).phi() << ")" << std::endl;
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if(verbosity_>4) std::cout << " Mee=" << p4Z.mass() << std::endl;
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if( p4Z.mass()<60.0 || p4Z.mass()>120.0) return false;
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// Find CTF track best matching the GSF track assoicated to the electron
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// We will remove these tracks in the track collection for the primary vertex reconstruction
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reco::TrackRef tk1 = (electrons->at(iElectron1)).closestCtfTrackRef();
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reco::TrackRef tk2 = (electrons->at(iElectron2)).closestCtfTrackRef();
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if(verbosity_>4) std::cout << " CTF Track 1 - (Et,eta,phi)=(" << tk1->pt() << "," << tk1->eta() << "," << tk1->phi() << ") - Fraction of common hits with GSF =" << (electrons->at(iElectron1)).shFracInnerHits() << std::endl;
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if(verbosity_>4) std::cout << " CTF Track 2 - (Et,eta,phi)=(" << tk2->pt() << "," << tk2->eta() << "," << tk2->phi() << ") - Fraction of common hits with GSF =" << (electrons->at(iElectron2)).shFracInnerHits() << std::endl;
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Private Primary Vertex reconstruction with all CTF tracks
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Get BeamSpot
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reco::BeamSpot vertexBeamSpot;
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edm::Handle<reco::BeamSpot> recoBeamSpotHandle;
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iEvent.getByLabel(beamSpotProducer_, recoBeamSpotHandle);
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if (recoBeamSpotHandle.isValid()) vertexBeamSpot = *recoBeamSpotHandle;
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// Get Track Collection
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edm::Handle<reco::TrackCollection> recoTracks;
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iEvent.getByLabel(trackProducer_, recoTracks);
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// Get Transient Track Collection
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edm::ESHandle<TransientTrackBuilder> trackBuilder;
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iSetup.get<TransientTrackRecord>().get("TransientTrackBuilder",trackBuilder);
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vector<reco::TransientTrack> transientTracks = (*trackBuilder).build(recoTracks, vertexBeamSpot);
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// Call Primary Vertex Reconstruction using all tracks in the event
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PrimaryVertexProducerAlgorithm theVertexProducer(config_);
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vector<TransientVertex> transientZeeVertices = theVertexProducer.vertices(transientTracks, vertexBeamSpot);
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reco::VertexCollection zeeVertices;
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for (vector<TransientVertex>::const_iterator vertex = transientZeeVertices.begin(); vertex != transientZeeVertices.end(); vertex++)
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{
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reco::Vertex v = *vertex;
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zeeVertices.push_back(v);
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}
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if(verbosity_>4) std::cout << std::endl << " Private Primary Vertex reconstruction with all tracks - Number of vertices = " << zeeVertices.size() << std::endl;
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for (unsigned int j=0; j<zeeVertices.size(); j++)
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{
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reco::Vertex* vertex = & (zeeVertices.at(j));
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// Put your vertex selection here....
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if (! vertex->isValid() ) continue;
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if ( vertex->isFake() ) continue;
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Int_t ntracks = 0;
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Float_t higherPt = 0.;
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Float_t scalarSumPt = 0.;
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Float_t vectorSumPt = 0.;
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math::XYZVector vectorSum(0.,0.,0.);
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for( std::vector< reco::TrackBaseRef >::const_iterator it = vertex->tracks_begin(); it != vertex->tracks_end(); it++)
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{
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scalarSumPt += (**it).pt();
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vectorSum += (**it).momentum();
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if( (**it).pt()>higherPt ) higherPt=(**it).pt();
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ntracks++;
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}
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vectorSumPt = sqrt(vectorSum.Perp2());
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// No refitted tracks embeded in reco::Vertex....
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//cout << "vertex->refittedTracks().size()=" << vertex->refittedTracks().size() << endl;
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TRootVertex localVertex(
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vertex->x()
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,vertex->y()
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,vertex->z()
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,vertex->xError()
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,vertex->yError()
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,vertex->zError()
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);
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localVertex.setAlgoName("AllTracks");
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localVertex.setChi2( vertex->chi2() );
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localVertex.setNdof( vertex->ndof() );
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localVertex.setNtracks( ntracks );
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localVertex.setHigherTrackPt( higherPt );
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localVertex.setScalarSumPt( scalarSumPt );
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localVertex.setVectorSumPt( vectorSumPt );
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new( (*rootVertices)[iRootVertex] ) TRootVertex(localVertex);
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if(verbosity_>2) cout << " ["<< setw(3) << iRootVertex << "] " << localVertex << endl;
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iRootVertex++;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Private Primary Vertex reconstruction with all CTF tracks except the 2 two tracks matching selected electrons
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Remove the two CTF tracks matching the two electron GSF tracks from the track collection
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unsigned int itk1 = 999999;
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unsigned int itk2 = 999999;
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for (unsigned int j=0; j<transientTracks.size(); j++)
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{
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const reco::Track* tk = & (transientTracks.at(j).track());
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if(verbosity_>5) std::cout << " Tk[" << j << "] (Et,eta,phi)=(" << tk->pt() << "," << tk->eta() << "," << tk->phi() << ")" << std::endl;
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if ( tk->pt()==tk1->pt() && tk->eta()==tk1->eta() && tk->phi()==tk1->phi() )
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{
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itk1 = j;
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if(verbosity_>5) std::cout << " ===> this is tk1" << std::endl;
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}
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if ( tk->pt()==tk2->pt() && tk->eta()==tk2->eta() && tk->phi()==tk2->phi() )
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{
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itk2 = j;
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if(verbosity_>5) std::cout << " ===> this is tk2" << std::endl;
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}
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}
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if (itk1==999999 || itk2==999999)
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{
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std::cout << " ***** NO CTF TRACKS MATCHING THE ELECTRON *****" << std::endl;
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return false;
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}
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if (itk1<itk2) itk2--;
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transientTracks.erase (transientTracks.begin()+itk1);
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transientTracks.erase (transientTracks.begin()+itk2);
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if(verbosity_>5)
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{
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for (unsigned int j=0; j<transientTracks.size(); j++)
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{
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const reco::Track* tk = & (transientTracks.at(j).track());
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std::cout << " New Tk[" << j << "] (Et,eta,phi)=(" << tk->pt() << "," << tk->eta() << "," << tk->phi() << ")" << std::endl;
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}
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}
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// Call Primary Vertex Reconstruction using all tracks in the event except the two electrons
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vector<TransientVertex> transientNoEEVertices = theVertexProducer.vertices(transientTracks, vertexBeamSpot);
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reco::VertexCollection noEEVertices;
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for (vector<TransientVertex>::const_iterator vertex = transientNoEEVertices.begin(); vertex != transientNoEEVertices.end(); vertex++)
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{
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reco::Vertex v = *vertex;
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noEEVertices.push_back(v);
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}
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if(verbosity_>4) std::cout << std::endl << " Private Primary Vertex reconstruction with all tracks except the two electrons - Number of vertices = " << noEEVertices.size() << std::endl;
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for (unsigned int j=0; j<noEEVertices.size(); j++)
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{
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reco::Vertex* vertex = & (noEEVertices.at(j));
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// Put your vertex selection here....
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if (! vertex->isValid() ) continue;
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if ( vertex->isFake() ) continue;
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Int_t ntracks = 0;
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Float_t higherPt = 0.;
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Float_t scalarSumPt = 0.;
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Float_t vectorSumPt = 0.;
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math::XYZVector vectorSum(0.,0.,0.);
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for( std::vector< reco::TrackBaseRef >::const_iterator it = vertex->tracks_begin(); it != vertex->tracks_end(); it++)
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{
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scalarSumPt += (**it).pt();
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vectorSum += (**it).momentum();
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if( (**it).pt()>higherPt ) higherPt=(**it).pt();
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ntracks++;
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}
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vectorSumPt = sqrt(vectorSum.Perp2());
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// No refitted tracks embeded in reco::Vertex....
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//cout << "vertex->refittedTracks().size()=" << vertex->refittedTracks().size() << endl;
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TRootVertex localVertex(
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vertex->x()
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,vertex->y()
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,vertex->z()
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,vertex->xError()
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,vertex->yError()
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,vertex->zError()
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);
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localVertex.setAlgoName("NoEE");
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localVertex.setChi2( vertex->chi2() );
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localVertex.setNdof( vertex->ndof() );
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localVertex.setNtracks( ntracks );
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localVertex.setHigherTrackPt( higherPt );
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localVertex.setScalarSumPt( scalarSumPt );
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localVertex.setVectorSumPt( vectorSumPt );
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new( (*rootVertices)[iRootVertex] ) TRootVertex(localVertex);
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if(verbosity_>2) cout << " ["<< setw(3) << iRootVertex << "] " << localVertex << endl;
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iRootVertex++;
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}
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return true;
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}
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