/************************************************************************** * Copyright(c) 1998-2007, ALICE Experiment at CERN, All rights reserved. * * * * Author: The ALICE Off-line Project. * * Contributors are mentioned in the code where appropriate. * * * * Permission to use, copy, modify and distribute this software and its * * documentation strictly for non-commercial purposes is hereby granted * * without fee, provided that the above copyright notice appears in all * * copies and that both the copyright notice and this permission notice * * appear in the supporting documentation. The authors make no claims * * about the suitability of this software for any purpose. It is * * provided "as is" without express or implied warranty. * **************************************************************************/ /* $Id$ */ //------------------------------------------------------------------------- // AOD track implementation of AliVTrack // Author: Markus Oldenburg, CERN // Markus.Oldenburg@cern.ch //------------------------------------------------------------------------- #include "AliLog.h" #include "AliAODTrack.h" ClassImp(AliAODTrack) //______________________________________________________________________________ AliAODTrack::AliAODTrack() : AliVTrack(), fChi2perNDF(-999.), fChi2MatchTrigger(0.), fFlags(0), fLabel(-999), fITSMuonClusterMap(0), fFilterMap(0), fID(-999), fCharge(-99), fType(kUndef), fCovMatrix(NULL), fDetPid(NULL), fProdVertex(NULL) { // default constructor SetP(); SetPosition((Float_t*)NULL); SetXYAtDCA(-999., -999.); SetPxPyPzAtDCA(-999., -999., -999.); SetPID((Float_t*)NULL); } //______________________________________________________________________________ AliAODTrack::AliAODTrack(Short_t id, Int_t label, Double_t p[3], Bool_t cartesian, Double_t x[3], Bool_t isDCA, Double_t covMatrix[21], Short_t charge, UChar_t itsClusMap, Double_t pid[10], AliAODVertex *prodVertex, Bool_t usedForVtxFit, Bool_t usedForPrimVtxFit, AODTrk_t ttype, UInt_t selectInfo, Float_t chi2perNDF) : AliVTrack(), fChi2perNDF(chi2perNDF), fChi2MatchTrigger(0.), fFlags(0), fLabel(label), fITSMuonClusterMap(0), fFilterMap(selectInfo), fID(id), fCharge(charge), fType(ttype), fCovMatrix(NULL), fDetPid(NULL), fProdVertex(prodVertex) { // constructor SetP(p, cartesian); SetPosition(x, isDCA); SetXYAtDCA(-999., -999.); SetPxPyPzAtDCA(-999., -999., -999.); SetUsedForVtxFit(usedForVtxFit); SetUsedForPrimVtxFit(usedForPrimVtxFit); if(covMatrix) SetCovMatrix(covMatrix); SetPID(pid); SetITSClusterMap(itsClusMap); } //______________________________________________________________________________ AliAODTrack::AliAODTrack(Short_t id, Int_t label, Float_t p[3], Bool_t cartesian, Float_t x[3], Bool_t isDCA, Float_t covMatrix[21], Short_t charge, UChar_t itsClusMap, Float_t pid[10], AliAODVertex *prodVertex, Bool_t usedForVtxFit, Bool_t usedForPrimVtxFit, AODTrk_t ttype, UInt_t selectInfo, Float_t chi2perNDF) : AliVTrack(), fChi2perNDF(chi2perNDF), fChi2MatchTrigger(0.), fFlags(0), fLabel(label), fITSMuonClusterMap(0), fFilterMap(selectInfo), fID(id), fCharge(charge), fType(ttype), fCovMatrix(NULL), fDetPid(NULL), fProdVertex(prodVertex) { // constructor SetP(p, cartesian); SetPosition(x, isDCA); SetXYAtDCA(-999., -999.); SetPxPyPzAtDCA(-999., -999., -999.); SetUsedForVtxFit(usedForVtxFit); SetUsedForPrimVtxFit(usedForPrimVtxFit); if(covMatrix) SetCovMatrix(covMatrix); SetPID(pid); SetITSClusterMap(itsClusMap); } //______________________________________________________________________________ AliAODTrack::~AliAODTrack() { // destructor delete fCovMatrix; delete fDetPid; } //______________________________________________________________________________ AliAODTrack::AliAODTrack(const AliAODTrack& trk) : AliVTrack(trk), fChi2perNDF(trk.fChi2perNDF), fChi2MatchTrigger(trk.fChi2MatchTrigger), fFlags(trk.fFlags), fLabel(trk.fLabel), fITSMuonClusterMap(trk.fITSMuonClusterMap), fFilterMap(trk.fFilterMap), fID(trk.fID), fCharge(trk.fCharge), fType(trk.fType), fCovMatrix(NULL), fDetPid(NULL), fProdVertex(trk.fProdVertex) { // Copy constructor trk.GetP(fMomentum); trk.GetPosition(fPosition); SetXYAtDCA(trk.XAtDCA(), trk.YAtDCA()); SetPxPyPzAtDCA(trk.PxAtDCA(), trk.PyAtDCA(), trk.PzAtDCA()); SetUsedForVtxFit(trk.GetUsedForVtxFit()); SetUsedForPrimVtxFit(trk.GetUsedForPrimVtxFit()); if(trk.fCovMatrix) fCovMatrix=new AliAODRedCov<6>(*trk.fCovMatrix); if(trk.fDetPid) fDetPid=new AliAODPid(*trk.fDetPid); SetPID(trk.fPID); } //______________________________________________________________________________ AliAODTrack& AliAODTrack::operator=(const AliAODTrack& trk) { // Assignment operator if(this!=&trk) { AliVTrack::operator=(trk); trk.GetP(fMomentum); trk.GetPosition(fPosition); trk.GetPID(fPID); SetXYAtDCA(trk.XAtDCA(), trk.YAtDCA()); SetPxPyPzAtDCA(trk.PxAtDCA(), trk.PyAtDCA(), trk.PzAtDCA()); fChi2perNDF = trk.fChi2perNDF; fChi2MatchTrigger = trk.fChi2MatchTrigger; fFlags = trk.fFlags; fLabel = trk.fLabel; fITSMuonClusterMap = trk.fITSMuonClusterMap; fFilterMap = trk.fFilterMap; fID = trk.fID; fCharge = trk.fCharge; fType = trk.fType; delete fCovMatrix; if(trk.fCovMatrix) fCovMatrix=new AliAODRedCov<6>(*trk.fCovMatrix); else fCovMatrix=NULL; fProdVertex = trk.fProdVertex; SetUsedForVtxFit(trk.GetUsedForVtxFit()); SetUsedForPrimVtxFit(trk.GetUsedForPrimVtxFit()); delete fDetPid; if(trk.fDetPid) fDetPid=new AliAODPid(*trk.fDetPid); else fDetPid=NULL; } return *this; } //______________________________________________________________________________ Double_t AliAODTrack::M(AODTrkPID_t pid) const { // Returns the mass. // Masses for nuclei don't exist in the PDG tables, therefore they were put by hand. switch (pid) { case kElectron : return 0.000510999; //TDatabasePDG::Instance()->GetParticle(11/*::kElectron*/)->Mass(); break; case kMuon : return 0.1056584; //TDatabasePDG::Instance()->GetParticle(13/*::kMuonMinus*/)->Mass(); break; case kPion : return 0.13957; //TDatabasePDG::Instance()->GetParticle(211/*::kPiPlus*/)->Mass(); break; case kKaon : return 0.4937; //TDatabasePDG::Instance()->GetParticle(321/*::kKPlus*/)->Mass(); break; case kProton : return 0.9382720; //TDatabasePDG::Instance()->GetParticle(2212/*::kProton*/)->Mass(); break; case kDeuteron : return 1.8756; //TDatabasePDG::Instance()->GetParticle(1000010020)->Mass(); break; case kTriton : return 2.8089; //TDatabasePDG::Instance()->GetParticle(1000010030)->Mass(); break; case kHelium3 : return 2.8084; //TDatabasePDG::Instance()->GetParticle(1000020030)->Mass(); break; case kAlpha : return 3.7274; //TDatabasePDG::Instance()->GetParticle(1000020040)->Mass(); break; case kUnknown : return -999.; break; default : return -999.; } } //______________________________________________________________________________ Double_t AliAODTrack::E(AODTrkPID_t pid) const { // Returns the energy of the particle of a given pid. if (pid != kUnknown) { // particle was identified Double_t m = M(pid); return TMath::Sqrt(P()*P() + m*m); } else { // pid unknown return -999.; } } //______________________________________________________________________________ Double_t AliAODTrack::Y(AODTrkPID_t pid) const { // Returns the rapidity of a particle of a given pid. if (pid != kUnknown) { // particle was identified Double_t e = E(pid); Double_t pz = Pz(); if (e>=0 && e!=pz) { // energy was positive (e.g. not -999.) and not equal to pz return 0.5*TMath::Log((e+pz)/(e-pz)); } else { // energy not known or equal to pz return -999.; } } else { // pid unknown return -999.; } } //______________________________________________________________________________ Double_t AliAODTrack::Y(Double_t m) const { // Returns the rapidity of a particle of a given mass. if (m >= 0.) { // mass makes sense Double_t e = E(m); Double_t pz = Pz(); if (e>=0 && e!=pz) { // energy was positive (e.g. not -999.) and not equal to pz return 0.5*TMath::Log((e+pz)/(e-pz)); } else { // energy not known or equal to pz return -999.; } } else { // pid unknown return -999.; } } //______________________________________________________________________________ AliAODTrack::AODTrkPID_t AliAODTrack::GetMostProbablePID() const { // Returns the most probable PID array element. Int_t nPID = 10; if (fPID) { AODTrkPID_t loc = kUnknown; Double_t max = 0.; Bool_t allTheSame = kTRUE; for (Int_t iPID = 0; iPID < nPID; iPID++) { if (fPID[iPID] >= max) { if (fPID[iPID] > max) { allTheSame = kFALSE; max = fPID[iPID]; loc = (AODTrkPID_t)iPID; } else { allTheSame = kTRUE; } } } return allTheSame ? kUnknown : loc; } else { return kUnknown; } } //______________________________________________________________________________ void AliAODTrack::ConvertAliPIDtoAODPID() { // Converts AliPID array. // The numbering scheme is the same for electrons, muons, pions, kaons, and protons. // Everything else has to be set to zero. fPID[kDeuteron] = 0.; fPID[kTriton] = 0.; fPID[kHelium3] = 0.; fPID[kAlpha] = 0.; fPID[kUnknown] = 0.; return; } //______________________________________________________________________________ template void AliAODTrack::SetP(const T *p, const Bool_t cartesian) { // Set the momentum if (p) { if (cartesian) { Double_t pt2 = p[0]*p[0] + p[1]*p[1]; Double_t pp = TMath::Sqrt(pt2 + p[2]*p[2]); fMomentum[0] = TMath::Sqrt(pt2); // pt fMomentum[1] = (pt2 != 0.) ? TMath::Pi()+TMath::ATan2(-p[1], -p[0]) : -999; // phi fMomentum[2] = (pp != 0.) ? TMath::ACos(p[2] / pp) : -999.; // theta } else { fMomentum[0] = p[0]; // pt fMomentum[1] = p[1]; // phi fMomentum[2] = p[2]; // theta } } else { fMomentum[0] = -999.; fMomentum[1] = -999.; fMomentum[2] = -999.; } } //______________________________________________________________________________ template void AliAODTrack::SetPosition(const T *x, const Bool_t dca) { // set the position if (x) { if (!dca) { ResetBit(kIsDCA); fPosition[0] = x[0]; fPosition[1] = x[1]; fPosition[2] = x[2]; } else { SetBit(kIsDCA); // don't know any better yet fPosition[0] = -999.; fPosition[1] = -999.; fPosition[2] = -999.; } } else { ResetBit(kIsDCA); fPosition[0] = -999.; fPosition[1] = -999.; fPosition[2] = -999.; } } //______________________________________________________________________________ void AliAODTrack::SetDCA(Double_t d, Double_t z) { // set the dca fPosition[0] = d; fPosition[1] = z; fPosition[2] = 0.; SetBit(kIsDCA); } //______________________________________________________________________________ void AliAODTrack::Print(Option_t* /* option */) const { // prints information about AliAODTrack printf("Object name: %s Track type: %s\n", GetName(), GetTitle()); printf(" px = %f\n", Px()); printf(" py = %f\n", Py()); printf(" pz = %f\n", Pz()); printf(" pt = %f\n", Pt()); printf(" 1/pt = %f\n", OneOverPt()); printf(" theta = %f\n", Theta()); printf(" phi = %f\n", Phi()); printf(" chi2/NDF = %f\n", Chi2perNDF()); printf(" charge = %d\n", Charge()); } //______________________________________________________________________________ void AliAODTrack::SetMatchTrigger(Int_t matchTrig) { // Set the MUON trigger information switch(matchTrig){ case 0: // 0 track does not match trigger fITSMuonClusterMap=fITSMuonClusterMap&0x3fffffff; break; case 1: // 1 track match but does not pass pt cut fITSMuonClusterMap=(fITSMuonClusterMap&0x3fffffff)|0x40000000; break; case 2: // 2 track match Low pt cut fITSMuonClusterMap=(fITSMuonClusterMap&0x3fffffff)|0x80000000; break; case 3: // 3 track match High pt cut fITSMuonClusterMap=fITSMuonClusterMap|0xc0000000; break; default: fITSMuonClusterMap=fITSMuonClusterMap&0x3fffffff; AliWarning(Form("unknown case for matchTrig: %d\n",matchTrig)); } } //______________________________________________________________________________ Bool_t AliAODTrack::HitsMuonChamber(Int_t MuonChamber, Int_t cathode) const { // return kTRUE if the track fires the given tracking or trigger chamber. // If the chamber is a trigger one: // - if cathode = 0 or 1, the track matches the corresponding cathode // - if cathode = -1, the track matches both cathodes if (MuonChamber < 0) return kFALSE; if (MuonChamber < 10) return TESTBIT(GetMUONClusterMap(), MuonChamber); if (MuonChamber < 14) { if (cathode < 0) return TESTBIT(GetHitsPatternInTrigCh(), 13-MuonChamber) && TESTBIT(GetHitsPatternInTrigCh(), 13-MuonChamber+4); if (cathode < 2) return TESTBIT(GetHitsPatternInTrigCh(), 13-MuonChamber+(1-cathode)*4); } return kFALSE; } //______________________________________________________________________________ Bool_t AliAODTrack::MatchTriggerDigits() const { // return kTRUE if the track matches a digit on both planes of at least 2 trigger chambers Int_t nMatchedChambers = 0; for (Int_t ich=10; ich<14; ich++) if (HitsMuonChamber(ich)) nMatchedChambers++; return (nMatchedChambers >= 2); }