//______________________________________________________________________________
AliAODTrack::AliAODTrack() :
AliVirtualParticle(),
- fChi2(-999.),
+ fChi2perNDF(-999.),
fID(-999),
fLabel(-999),
fCovMatrix(NULL),
fProdVertex(0x0),
- fCharge(-999),
- fITSClusterMap(0),
+ fCharge(-99),
+ fITSMuonClusterMap(0),
fType(kUndef)
{
// default constructor
UChar_t itsClusMap,
Double_t pid[10],
AliAODVertex *prodVertex,
+ Bool_t usedForVtxFit,
+ Bool_t usedForPrimVtxFit,
AODTrk_t ttype) :
AliVirtualParticle(),
- fChi2(-999.),
+ fChi2perNDF(-999.),
fID(id),
fLabel(label),
fCovMatrix(NULL),
fProdVertex(prodVertex),
fCharge(charge),
- fITSClusterMap(itsClusMap),
+ fITSMuonClusterMap(itsClusMap),
fType(ttype)
{
// constructor
SetP(p, cartesian);
SetPosition(x, isDCA);
+ SetUsedForVtxFit(usedForVtxFit);
+ SetUsedForPrimVtxFit(usedForPrimVtxFit);
if(covMatrix) SetCovMatrix(covMatrix);
SetPID(pid);
UChar_t itsClusMap,
Float_t pid[10],
AliAODVertex *prodVertex,
+ Bool_t usedForVtxFit,
+ Bool_t usedForPrimVtxFit,
AODTrk_t ttype) :
AliVirtualParticle(),
- fChi2(-999.),
+ fChi2perNDF(-999.),
fID(id),
fLabel(label),
fCovMatrix(NULL),
fProdVertex(prodVertex),
fCharge(charge),
- fITSClusterMap(itsClusMap),
+ fITSMuonClusterMap(itsClusMap),
fType(ttype)
{
// constructor
SetP(p, cartesian);
SetPosition(x, isDCA);
+ SetUsedForVtxFit(usedForVtxFit);
+ SetUsedForPrimVtxFit(usedForPrimVtxFit);
if(covMatrix) SetCovMatrix(covMatrix);
SetPID(pid);
-
}
//______________________________________________________________________________
//______________________________________________________________________________
AliAODTrack::AliAODTrack(const AliAODTrack& trk) :
AliVirtualParticle(trk),
- fChi2(trk.fChi2),
+ fChi2perNDF(trk.fChi2perNDF),
fID(trk.fID),
fLabel(trk.fLabel),
fCovMatrix(NULL),
fProdVertex(trk.fProdVertex),
fCharge(trk.fCharge),
- fITSClusterMap(trk.fITSClusterMap),
+ fITSMuonClusterMap(trk.fITSMuonClusterMap),
fType(trk.fType)
{
// Copy constructor
trk.GetP(fMomentum);
trk.GetPosition(fPosition);
+ SetUsedForVtxFit(trk.GetUsedForVtxFit());
+ SetUsedForPrimVtxFit(trk.GetUsedForPrimVtxFit());
if(trk.fCovMatrix) fCovMatrix=new AliAODRedCov<6>(*trk.fCovMatrix);
SetPID(trk.fPID);
trk.GetPosition(fPosition);
trk.GetPID(fPID);
- fChi2 = trk.fChi2;
+ fChi2perNDF = trk.fChi2perNDF;
fID = trk.fID;
fLabel = trk.fLabel;
fProdVertex = trk.fProdVertex;
fCharge = trk.fCharge;
- fITSClusterMap = trk.fITSClusterMap;
+ fITSMuonClusterMap = trk.fITSMuonClusterMap;
+ SetUsedForVtxFit(trk.GetUsedForVtxFit());
+ SetUsedForPrimVtxFit(trk.GetUsedForPrimVtxFit());
fType = trk.fType;
}
return *this;
}
+//______________________________________________________________________________
+Double_t AliAODTrack::M(AODTrkPID_t pid) const
+{
+ // Returns the mass.
+ // In the case of elementary particles the hard coded mass values were taken
+ // from the PDG. In all cases the errors on the values do not affect
+ // the last digit.
+
+
+ switch (pid) {
+
+ case kElectron :
+ return 0.000510999;
+ break;
+
+ case kMuon :
+ return 0.1056584;
+ break;
+
+ case kPion :
+ return 0.13957;
+ break;
+
+ case kKaon :
+ return 0.4937;
+ break;
+
+ case kProton :
+ return 0.9382720;
+ break;
+
+ case kDeuteron :
+ return 1.8756;
+ break;
+
+ case kTriton :
+ return 2.8089;
+ break;
+
+ case kHelium3 :
+ return 2.8084;
+ break;
+
+ case kAlpha :
+ return 3.7274;
+ 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 energy of the 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 energy of the 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 <class T> void AliAODTrack::SetP(const T *p, const Bool_t cartesian)
{
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 P = 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::ATan2(p[1], p[0]) : -999; // phi
+ fMomentum[2] = (P != 0.) ? TMath::ACos(p[2]/P) : -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());
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff