/* $Id$ */
//-------------------------------------------------------------------------
-// AOD track base class
+// AOD track implementation of AliVTrack
// Author: Markus Oldenburg, CERN
+// Markus.Oldenburg@cern.ch
//-------------------------------------------------------------------------
+#include "AliLog.h"
+#include "AliExternalTrackParam.h"
+#include "AliVVertex.h"
#include "AliAODTrack.h"
ClassImp(AliAODTrack)
//______________________________________________________________________________
AliAODTrack::AliAODTrack() :
- AliVirtualParticle(),
- fChi2(-999.),
- fID(-999),
+ AliVTrack(),
+ fRAtAbsorberEnd(0.),
+ fChi2perNDF(-999.),
+ fChi2MatchTrigger(0.),
+ fFlags(0),
fLabel(-999),
+ fITSMuonClusterMap(0),
+ fFilterMap(0),
+ fTPCClusterMap(),
+ fTPCSharedMap(),
+ fTPCnclsF(0),
+ fID(-999),
+ fCharge(-99),
+ fType(kUndef),
fCovMatrix(NULL),
- fProdVertex(0x0),
- fCharge(-999),
- fITSClusterMap(0),
- fType(kUndef)
+ fDetPid(NULL),
+ fProdVertex(NULL)
{
// default constructor
SetP();
SetPosition((Float_t*)NULL);
+ SetXYAtDCA(-999., -999.);
+ SetPxPyPzAtDCA(-999., -999., -999.);
SetPID((Float_t*)NULL);
}
//______________________________________________________________________________
-AliAODTrack::AliAODTrack(Int_t id,
+AliAODTrack::AliAODTrack(Short_t id,
Int_t label,
Double_t p[3],
Bool_t cartesian,
UChar_t itsClusMap,
Double_t pid[10],
AliAODVertex *prodVertex,
- AODTrk_t ttype) :
- AliVirtualParticle(),
- fChi2(-999.),
- fID(id),
+ Bool_t usedForVtxFit,
+ Bool_t usedForPrimVtxFit,
+ AODTrk_t ttype,
+ UInt_t selectInfo,
+ Float_t chi2perNDF) :
+ AliVTrack(),
+ fRAtAbsorberEnd(0.),
+ fChi2perNDF(chi2perNDF),
+ fChi2MatchTrigger(0.),
+ fFlags(0),
fLabel(label),
- fCovMatrix(NULL),
- fProdVertex(prodVertex),
+ fITSMuonClusterMap(0),
+ fFilterMap(selectInfo),
+ fTPCClusterMap(),
+ fTPCSharedMap(),
+ fTPCnclsF(0),
+ fID(id),
fCharge(charge),
- fITSClusterMap(itsClusMap),
- fType(ttype)
+ 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(Int_t id,
+AliAODTrack::AliAODTrack(Short_t id,
Int_t label,
Float_t p[3],
Bool_t cartesian,
UChar_t itsClusMap,
Float_t pid[10],
AliAODVertex *prodVertex,
- AODTrk_t ttype) :
- AliVirtualParticle(),
- fChi2(-999.),
- fID(id),
+ Bool_t usedForVtxFit,
+ Bool_t usedForPrimVtxFit,
+ AODTrk_t ttype,
+ UInt_t selectInfo,
+ Float_t chi2perNDF) :
+ AliVTrack(),
+ fRAtAbsorberEnd(0.),
+ fChi2perNDF(chi2perNDF),
+ fChi2MatchTrigger(0.),
+ fFlags(0),
fLabel(label),
- fCovMatrix(NULL),
- fProdVertex(prodVertex),
+ fITSMuonClusterMap(0),
+ fFilterMap(selectInfo),
+ fTPCClusterMap(),
+ fTPCSharedMap(),
+ fTPCnclsF(0),
+ fID(id),
fCharge(charge),
- fITSClusterMap(itsClusMap),
- fType(ttype)
+ 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);
}
//______________________________________________________________________________
{
// destructor
delete fCovMatrix;
+ delete fDetPid;
}
//______________________________________________________________________________
AliAODTrack::AliAODTrack(const AliAODTrack& trk) :
- AliVirtualParticle(trk),
- fChi2(trk.fChi2),
- fID(trk.fID),
+ AliVTrack(trk),
+ fRAtAbsorberEnd(trk.fRAtAbsorberEnd),
+ fChi2perNDF(trk.fChi2perNDF),
+ fChi2MatchTrigger(trk.fChi2MatchTrigger),
+ fFlags(trk.fFlags),
fLabel(trk.fLabel),
- fCovMatrix(NULL),
- fProdVertex(trk.fProdVertex),
+ fITSMuonClusterMap(trk.fITSMuonClusterMap),
+ fFilterMap(trk.fFilterMap),
+ fTPCClusterMap(trk.fTPCClusterMap),
+ fTPCSharedMap(trk.fTPCSharedMap),
+ fTPCnclsF(trk.fTPCnclsF),
+ fID(trk.fID),
fCharge(trk.fCharge),
- fITSClusterMap(trk.fITSClusterMap),
- fType(trk.fType)
+ 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);
-
}
//______________________________________________________________________________
// Assignment operator
if(this!=&trk) {
- AliVirtualParticle::operator=(trk);
+ AliVTrack::operator=(trk);
trk.GetP(fMomentum);
trk.GetPosition(fPosition);
trk.GetPID(fPID);
- fChi2 = trk.fChi2;
+ SetXYAtDCA(trk.XAtDCA(), trk.YAtDCA());
+ SetPxPyPzAtDCA(trk.PxAtDCA(), trk.PyAtDCA(), trk.PzAtDCA());
+
+ fRAtAbsorberEnd = trk.fRAtAbsorberEnd;
+
+ fChi2perNDF = trk.fChi2perNDF;
+ fChi2MatchTrigger = trk.fChi2MatchTrigger;
- fID = trk.fID;
+ 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;
- fCharge = trk.fCharge;
- fITSClusterMap = trk.fITSClusterMap;
- fType = trk.fType;
+ 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;
+ 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;
+}
+
+//______________________________________________________________________________
+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 <class T> void AliAODTrack::SetP(const T *p, const Bool_t cartesian)
{
- // set the momentum
+ // Set the momentum
if (p) {
if (cartesian) {
- Double_t pt = TMath::Sqrt(p[0]*p[0] + p[1]*p[1]);
- Double_t P = TMath::Sqrt(pt*pt + p[2]*p[2]);
+ Double_t pt2 = p[0]*p[0] + p[1]*p[1];
+ Double_t pp = TMath::Sqrt(pt2 + p[2]*p[2]);
- fMomentum[0] = 1./pt;
- fMomentum[1] = TMath::ACos(p[2]/P);
- fMomentum[2] = TMath::ATan2(p[1], p[0]);
+ 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]; // 1/pt
+ fMomentum[0] = p[0]; // pt
fMomentum[1] = p[1]; // phi
fMomentum[2] = p[2]; // theta
}
printf(" 1/pt = %f\n", OneOverPt());
printf(" theta = %f\n", Theta());
printf(" phi = %f\n", Phi());
- printf(" chi2 = %f\n", Chi2());
+ printf(" chi2/NDF = %f\n", Chi2perNDF());
printf(" charge = %d\n", Charge());
- printf(" PID object: %p\n", PID());
}
+//______________________________________________________________________________
+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);
+}
+
+//______________________________________________________________________________
+Bool_t AliAODTrack::PropagateToDCA(const AliVVertex *vtx,
+ Double_t b, Double_t maxd, Double_t dz[2], Double_t covar[3])
+{
+ // compute impact parameters to the vertex vtx and their covariance matrix
+ // b is the Bz, needed to propagate correctly the track to vertex
+ // only the track parameters are update after the propagation (pos and mom),
+ // not the covariance matrix. This is OK for propagation over short distance
+ // inside the beam pipe.
+ // return kFALSE is something went wrong
+
+ // convert to AliExternalTrackParam
+ AliExternalTrackParam etp(this);
+
+ Float_t xstart = etp.GetX();
+ if(xstart>3.) {
+ AliError("This method can be used only for propagation inside the beam pipe");
+ return kFALSE;
+ }
+
+ if(!etp.PropagateToDCA(vtx,b,maxd,dz,covar)) return kFALSE;
+
+ // update track position and momentum
+ Double_t mom[3];
+ etp.GetPxPyPz(mom);
+ SetP(mom,kTRUE);
+ etp.GetXYZ(mom);
+ SetPosition(mom,kFALSE);
+
+
+ return kTRUE;
+}
+
+//______________________________________________________________________________
+Bool_t AliAODTrack::GetPxPyPz(Double_t p[3]) const
+{
+ //---------------------------------------------------------------------
+ // This function returns the global track momentum components
+ //---------------------------------------------------------------------
+ p[0]=Px(); p[1]=Py(); p[2]=Pz();
+ return kTRUE;
+}
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