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// $Id: IsolationTools.cc,v 1.8 2011/02/21 13:50:20 ceballos Exp $
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#include "MitPhysics/Utils/interface/IsolationTools.h"
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#include "MitCommon/MathTools/interface/MathUtils.h"
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ClassImp(mithep::IsolationTools)
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using namespace mithep;
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//--------------------------------------------------------------------------------------------------
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Double_t IsolationTools::TrackIsolation(const Track *p, Double_t extRadius, Double_t intRadius,
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Double_t ptLow, Double_t maxVtxZDist,
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const Collection<Track> *tracks)
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{
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//Computes the Track Isolation: Summed Transverse Momentum of all tracks inside an
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//annulus around the electron seed track.
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Double_t ptSum =0.;
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for (UInt_t i=0; i<tracks->GetEntries();i++) {
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Double_t tmpPt = tracks->At(i)->Pt();
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Double_t deltaZ = fabs(p->Z0() - tracks->At(i)->Z0());
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//ignore the track if it is below the pt threshold
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if (tmpPt < ptLow)
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continue;
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//ingore the track if it is too far away in Z
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if (deltaZ > maxVtxZDist)
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continue;
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Double_t dr = MathUtils::DeltaR(p->Phi(),p->Eta(),tracks->At(i)->Phi(), tracks->At(i)->Eta());
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//add the track pt if it is inside the annulus
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if ( dr < extRadius &&
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dr >= intRadius ) {
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ptSum += tmpPt;
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}
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}
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return ptSum;
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}
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//--------------------------------------------------------------------------------------------------
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Double_t IsolationTools::EcalIsolation(const SuperCluster *sc, Double_t coneSize, Double_t etLow,
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const Collection<BasicCluster> *basicClusters)
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{
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//Computes the Ecal Isolation: Summed Transverse Energy of all Basic Clusters inside a
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//cone around the electron, excluding those that are inside the electron super cluster.
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Double_t ecalIsol=0.;
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const BasicCluster *basicCluster= 0;
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for (UInt_t i=0; i<basicClusters->GetEntries();i++) {
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basicCluster = basicClusters->At(i);
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Double_t basicClusterEnergy = basicCluster->Energy();
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Double_t basicClusterEta = basicCluster->Eta();
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Double_t basicClusterEt = basicClusterEnergy*sin(2*atan(exp(basicClusterEta)));
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if (basicClusterEt > etLow) {
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bool inSuperCluster = false;
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// loop over the basic clusters of the supercluster
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// to make sure that the basic cluster is not inside
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// the super cluster. We exclude those.
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for (UInt_t j=0; j<sc->ClusterSize(); j++) {
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const BasicCluster *tempBasicClusterInSuperCluster = sc->Cluster(j);
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if (tempBasicClusterInSuperCluster == basicCluster) {
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inSuperCluster = true;
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}
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}
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if (!inSuperCluster) {
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Double_t dr = MathUtils::DeltaR(sc->Phi(), sc->Eta(),
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basicCluster->Phi(),basicCluster->Eta());
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if(dr < coneSize) {
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ecalIsol += basicClusterEt;
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}
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}
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}
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}
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return ecalIsol;
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}
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//--------------------------------------------------------------------------------------------------
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Double_t IsolationTools::CaloTowerHadIsolation(const ThreeVector *p, Double_t extRadius,
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Double_t intRadius, Double_t etLow,
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const Collection<CaloTower> *caloTowers)
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{
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//Computes the CaloTower Had Et Isolation: Summed Hadronic Transverse Energy of all Calo Towers
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//inside an annulus around the electron super cluster position.
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Double_t sumEt = 0;
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for (UInt_t i=0; i<caloTowers->GetEntries();i++) {
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Double_t caloTowerEt = caloTowers->At(i)->HadEt();
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Double_t dr = MathUtils::DeltaR(caloTowers->At(i)->Phi(), caloTowers->At(i)->Eta(),
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p->Phi(), p->Eta());
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if (dr < extRadius && dr > intRadius && caloTowerEt > etLow) {
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sumEt += caloTowerEt;
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}
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}
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return sumEt;
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}
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//--------------------------------------------------------------------------------------------------
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Double_t IsolationTools::CaloTowerEmIsolation(const ThreeVector *p, Double_t extRadius,
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Double_t intRadius, Double_t etLow,
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const Collection<CaloTower> *caloTowers)
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{
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//Computes the CaloTower Em Et Isolation: Summed Hadronic Transverse Energy of all Calo Towers
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//inside an annulus around the electron super cluster position.
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Double_t sumEt = 0;
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for (UInt_t i=0; i<caloTowers->GetEntries();i++) {
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Double_t caloTowerEt = caloTowers->At(i)->EmEt();
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Double_t dr = MathUtils::DeltaR(caloTowers->At(i)->Phi(), caloTowers->At(i)->Eta(),
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p->Phi(), p->Eta());
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if (dr < extRadius && dr > intRadius && caloTowerEt > etLow) {
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sumEt += caloTowerEt;
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}
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}
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return sumEt;
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}
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//--------------------------------------------------------------------------------------------------
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Double_t IsolationTools::PFMuonIsolation(const Muon *p, const Collection<PFCandidate> *PFCands,
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const Vertex *vertex, Double_t delta_z, Double_t ptMin,
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Double_t extRadius, Double_t intRadius, int isoType,
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Double_t beta, const MuonCol *goodMuons,
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const ElectronCol *goodElectrons)
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{
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//Computes the PF Isolation: Summed Transverse Momentum of all PF candidates inside an
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//annulus around the particle seed track.
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Double_t zLepton = 0.0;
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if(p->BestTrk()) zLepton = p->BestTrk()->DzCorrected(*vertex);
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Double_t ptSum =0.;
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for (UInt_t i=0; i<PFCands->GetEntries();i++) {
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const PFCandidate *pf = PFCands->At(i);
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Bool_t isGoodType = kFALSE;
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// all particles
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if (isoType == 0) isGoodType = kTRUE;
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// charged particles only
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else if(isoType == 1 && pf->BestTrk()) isGoodType = kTRUE;
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// charged particles and gammas only
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else if(isoType == 2 &&
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(pf->BestTrk() || pf->PFType() == PFCandidate::eGamma)) isGoodType = kTRUE;
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// all particles, rejecting good leptons
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else if(isoType == 3) isGoodType = kTRUE;
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if(isGoodType == kFALSE) continue;
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if(pf->Pt() <= ptMin) continue;
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if(pf->TrackerTrk() && p->TrackerTrk() &&
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pf->TrackerTrk() == p->TrackerTrk()) continue;
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Double_t deltaZ = 0.0;
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if(pf->BestTrk()) {
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deltaZ = TMath::Abs(pf->BestTrk()->DzCorrected(*vertex) - zLepton);
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}
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// ignore the pf candidate if it is too far away in Z
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if (deltaZ >= delta_z)
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continue;
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Double_t dr = MathUtils::DeltaR(p->Mom(), pf->Mom());
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// add the pf pt if it is inside the extRadius and outside the intRadius
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if ( dr < extRadius &&
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dr >= intRadius ) {
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Bool_t isLepton = kFALSE;
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if(goodMuons && isoType == 3){
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for (UInt_t nl=0; nl<goodMuons->GetEntries();nl++) {
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const Muon *m = goodMuons->At(nl);
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if(pf->TrackerTrk() && m->TrackerTrk() &&
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pf->TrackerTrk() == m->TrackerTrk()) {
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isLepton = kTRUE;
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break;
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}
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}
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}
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if(goodElectrons && isLepton == kFALSE && isoType == 3){
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for (UInt_t nl=0; nl<goodElectrons->GetEntries();nl++) {
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const Electron *e = goodElectrons->At(nl);
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if(pf->TrackerTrk() && e->TrackerTrk() &&
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pf->TrackerTrk() == e->TrackerTrk()) {
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isLepton = kTRUE;
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break;
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}
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if(pf->GsfTrk() && e->GsfTrk() &&
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pf->GsfTrk() == e->GsfTrk()) {
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isLepton = kTRUE;
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break;
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}
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}
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}
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if(isLepton == kFALSE){
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if(pf->BestTrk()) ptSum += pf->Pt();
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else ptSum += pf->Pt()*beta;
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}
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}
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}
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return ptSum;
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}
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//--------------------------------------------------------------------------------------------------
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Double_t IsolationTools::PFElectronIsolation(const Electron *p, const PFCandidateCol *PFCands,
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const Vertex *vertex, Double_t delta_z, Double_t ptMin,
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Double_t extRadius, Double_t intRadius, int isoType,
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Double_t beta, const MuonCol *goodMuons,
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const ElectronCol *goodElectrons)
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{
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//Computes the PF Isolation: Summed Transverse Momentum of all PF candidates inside an
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//annulus around the particle seed track.
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Double_t zLepton = 0.0;
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if(p->BestTrk()) zLepton = p->BestTrk()->DzCorrected(*vertex);
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Double_t ptSum =0.;
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for (UInt_t i=0; i<PFCands->GetEntries();i++) {
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const PFCandidate *pf = PFCands->At(i);
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Bool_t isGoodType = kFALSE;
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// all particles
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if (isoType == 0) isGoodType = kTRUE;
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// charged particles only
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else if(isoType == 1 && pf->BestTrk()) isGoodType = kTRUE;
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// charged particles and gammas only
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else if(isoType == 2 &&
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(pf->BestTrk() || pf->PFType() == PFCandidate::eGamma)) isGoodType = kTRUE;
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// all particles, rejecting good leptons
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else if(isoType == 3) isGoodType = kTRUE;
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if(isGoodType == kFALSE) continue;
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if(pf->Pt() <= ptMin) continue;
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if(pf->TrackerTrk() && p->TrackerTrk() &&
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pf->TrackerTrk() == p->TrackerTrk()) continue;
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if(pf->GsfTrk() && p->GsfTrk() &&
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pf->GsfTrk() == p->GsfTrk()) continue;
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Double_t deltaZ = 0.0;
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if(pf->BestTrk()) {
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deltaZ = TMath::Abs(pf->BestTrk()->DzCorrected(*vertex) - zLepton);
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}
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// ignore the pf candidate if it is too far away in Z
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if (deltaZ >= delta_z)
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continue;
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Double_t dr = MathUtils::DeltaR(p->Mom(), pf->Mom());
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// add the pf pt if it is inside the extRadius and outside the intRadius
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if ( dr < extRadius &&
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dr >= intRadius ) {
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Bool_t isLepton = kFALSE;
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if(goodMuons && isoType == 3){
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for (UInt_t nl=0; nl<goodMuons->GetEntries();nl++) {
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const Muon *m = goodMuons->At(nl);
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if(pf->TrackerTrk() && m->TrackerTrk() &&
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pf->TrackerTrk() == m->TrackerTrk()) {
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isLepton = kTRUE;
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break;
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}
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}
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}
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if(goodElectrons && isLepton == kFALSE && isoType == 3){
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for (UInt_t nl=0; nl<goodElectrons->GetEntries();nl++) {
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const Electron *e = goodElectrons->At(nl);
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if(pf->TrackerTrk() && e->TrackerTrk() &&
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pf->TrackerTrk() == e->TrackerTrk()) {
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isLepton = kTRUE;
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break;
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}
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if(pf->GsfTrk() && e->GsfTrk() &&
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pf->GsfTrk() == e->GsfTrk()) {
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isLepton = kTRUE;
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break;
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}
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}
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}
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if(isLepton == kFALSE){
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if(pf->BestTrk()) ptSum += pf->Pt();
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else ptSum += pf->Pt()*beta;
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}
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}
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}
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return ptSum;
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}
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//--------------------------------------------------------------------------------------------------
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Double_t IsolationTools::BetaM(const TrackCol *tracks, const Muon *p, const Vertex *vertex,
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Double_t ptMin, Double_t delta_z, Double_t extRadius,
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Double_t intRadius){
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if(!tracks) return 1.0;
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if(tracks->GetEntries() <= 0) return 1.0;
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double Pt_jets_X = 0. ;
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double Pt_jets_Y = 0. ;
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double Pt_jets_X_tot = 0. ;
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double Pt_jets_Y_tot = 0. ;
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for(int i=0;i<int(tracks->GetEntries());i++){
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const Track *pTrack = tracks->At(i);
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if(pTrack && p->TrackerTrk() &&
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pTrack == p->TrackerTrk()) continue;
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if(pTrack->Pt() <= ptMin) continue;
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Double_t dr = MathUtils::DeltaR(pTrack->Mom(),p->Mom());
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if ( dr < extRadius && dr >= intRadius ) {
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Pt_jets_X_tot += pTrack->Px();
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Pt_jets_Y_tot += pTrack->Py();
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double pDz = TMath::Abs(pTrack->DzCorrected(*vertex));
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if(pDz < delta_z){
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Pt_jets_X += pTrack->Px();
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Pt_jets_Y += pTrack->Py();
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}
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}
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}
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if(sqrt(Pt_jets_X_tot*Pt_jets_X_tot + Pt_jets_Y_tot*Pt_jets_Y_tot) > 0)
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return sqrt(Pt_jets_X*Pt_jets_X + Pt_jets_Y*Pt_jets_Y) / sqrt(Pt_jets_X_tot*Pt_jets_X_tot + Pt_jets_Y_tot*Pt_jets_Y_tot);
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return 1.0;
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}
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//--------------------------------------------------------------------------------------------------
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Double_t IsolationTools::BetaE(const TrackCol *tracks, const Electron *p, const Vertex *vertex,
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Double_t ptMin, Double_t delta_z, Double_t extRadius,
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Double_t intRadius){
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if(!tracks) return 1.0;
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if(tracks->GetEntries() <= 0) return 1.0;
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double Pt_jets_X = 0. ;
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double Pt_jets_Y = 0. ;
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double Pt_jets_X_tot = 0. ;
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double Pt_jets_Y_tot = 0. ;
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for(int i=0;i<int(tracks->GetEntries());i++){
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const Track *pTrack = tracks->At(i);
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if(pTrack && p->TrackerTrk() &&
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pTrack == p->TrackerTrk()) continue;
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if(pTrack && p->GsfTrk() &&
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pTrack == p->GsfTrk()) continue;
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if(pTrack->Pt() <= ptMin) continue;
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Double_t dr = MathUtils::DeltaR(pTrack->Mom(),p->Mom());
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if ( dr < extRadius && dr >= intRadius ) {
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Pt_jets_X_tot += pTrack->Px();
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Pt_jets_Y_tot += pTrack->Py();
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double pDz = TMath::Abs(pTrack->DzCorrected(*vertex));
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if(pDz < delta_z){
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Pt_jets_X += pTrack->Px();
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Pt_jets_Y += pTrack->Py();
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}
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}
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}
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if(sqrt(Pt_jets_X_tot*Pt_jets_X_tot + Pt_jets_Y_tot*Pt_jets_Y_tot) > 0)
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return sqrt(Pt_jets_X*Pt_jets_X + Pt_jets_Y*Pt_jets_Y) / sqrt(Pt_jets_X_tot*Pt_jets_X_tot + Pt_jets_Y_tot*Pt_jets_Y_tot);
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return 1.0;
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}
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