* provided "as is" without express or implied warranty. *
**************************************************************************/
-/* $Id$ */
+/* $Id: AliESDpid.cxx 64123 2013-09-05 15:09:53Z morsch $ */
//-----------------------------------------------------------------
// Implementation of the combined PID class
ClassImp(AliESDpid)
-Int_t AliESDpid::MakePID(AliESDEvent *event, Bool_t TPConly, Float_t timeZeroTOF) const {
+Int_t AliESDpid::MakePID(AliESDEvent *event, Bool_t TPConly, Float_t /*timeZeroTOF*/) const {
//
// Calculate probabilities for all detectors, except if TPConly==kTRUE
// and combine PID
MakeTPCPID(track);
if (!TPConly) {
MakeITSPID(track);
- MakeTOFPID(track, timeZeroTOF);
+ //MakeTOFPID(track, timeZeroTOF);
//MakeHMPIDPID(track);
//MakeTRDPID(track);
}
if(mcEvent){
Bool_t kGood = kTRUE;
AliMCParticle *MCpart = (AliMCParticle *) mcEvent->GetTrack(TMath::Abs(t->GetLabel()));
- TParticle *part = MCpart->Particle();
-
- Int_t iS = TMath::Abs(part->GetPdgCode());
-
- if(iS==AliPID::ParticleCode(AliPID::kElectron)){
+ if (MCpart != NULL) { // protect against label-0 track (initial proton in Pythia events)
+ TParticle *part = MCpart->Particle();
+ Int_t iS = TMath::Abs(part->GetPdgCode());
+
+ if(iS==AliPID::ParticleCode(AliPID::kElectron)){
type = AliPID::kElectron;
- }
- else if(iS==AliPID::ParticleCode(AliPID::kMuon)){
+ }
+ else if(iS==AliPID::ParticleCode(AliPID::kMuon)){
type = AliPID::kMuon;
- }
- else if(iS==AliPID::ParticleCode(AliPID::kPion)){
+ }
+ else if(iS==AliPID::ParticleCode(AliPID::kPion)){
type = AliPID::kPion;
- }
- else if(iS==AliPID::ParticleCode(AliPID::kKaon)){
+ }
+ else if(iS==AliPID::ParticleCode(AliPID::kKaon)){
type = AliPID::kKaon;
- }
- else if(iS==AliPID::ParticleCode(AliPID::kProton)){
+ }
+ else if(iS==AliPID::ParticleCode(AliPID::kProton)){
type = AliPID::kProton;
- }
- else if(iS==AliPID::ParticleCode(AliPID::kDeuteron)){ // d
+ }
+ else if(iS==AliPID::ParticleCode(AliPID::kDeuteron)){ // d
type = AliPID::kDeuteron;
- }
- else if(iS==AliPID::ParticleCode(AliPID::kTriton)){ // t
+ }
+ else if(iS==AliPID::ParticleCode(AliPID::kTriton)){ // t
type = AliPID::kTriton;
- }
- else if(iS==AliPID::ParticleCode(AliPID::kHe3)){ // 3He
+ }
+ else if(iS==AliPID::ParticleCode(AliPID::kHe3)){ // 3He
type = AliPID::kHe3;
- }
- else if(iS==AliPID::ParticleCode(AliPID::kAlpha)){ // 4He
+ }
+ else if(iS==AliPID::ParticleCode(AliPID::kAlpha)){ // 4He
type = AliPID::kAlpha;
- }
- else
+ }
+ else
kGood = kFALSE;
-
+ } else kGood = kFALSE;
+
if(kGood){
//TODO maybe introduce different dEdxSources?
Double_t bethe = fTPCResponse.GetExpectedSignal(track, type, AliTPCPIDResponse::kdEdxDefault, this->UseTPCEtaCorrection(),
return;
}
- Double_t p[10];
+ Double_t p[AliPID::kSPECIES];
Bool_t mismatch=kTRUE, heavy=kTRUE;
for (Int_t j=0; j<AliPID::kSPECIES; j++) {
Int_t ibin = fTOFResponse.GetMomBin(track->GetP());
Float_t timezero = fTOFResponse.GetT0bin(ibin);
- Double_t time[AliPID::kSPECIES];
+ Double_t time[AliPID::kSPECIESC];
track->GetIntegratedTimes(time);
Double_t sigma[AliPID::kSPECIES];
// Combine the information of various detectors
// to determine the Particle Identification
//
- Int_t ns=AliPID::kSPECIES;
- Double_t p[10]={1.,1.,1.,1.,1.,1.,1.,1.,1.,1.};
+ Double_t p[AliPID::kSPECIES]={1.};
if (track->IsOn(AliESDtrack::kITSpid)) {
- Double_t d[10];
+ Double_t d[AliPID::kSPECIES];
track->GetITSpid(d);
- for (Int_t j=0; j<ns; j++) p[j]*=d[j];
+ for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]*=d[j];
}
if (track->IsOn(AliESDtrack::kTPCpid)) {
- Double_t d[10];
+ Double_t d[AliPID::kSPECIES];
track->GetTPCpid(d);
- for (Int_t j=0; j<ns; j++) p[j]*=d[j];
+ for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]*=d[j];
}
if (track->IsOn(AliESDtrack::kTRDpid)) {
- Double_t d[10];
+ Double_t d[AliPID::kSPECIES];
track->GetTRDpid(d);
- for (Int_t j=0; j<ns; j++) p[j]*=d[j];
+ for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]*=d[j];
}
if (track->IsOn(AliESDtrack::kTOFpid)) {
- Double_t d[10];
+ Double_t d[AliPID::kSPECIES];
track->GetTOFpid(d);
- for (Int_t j=0; j<ns; j++) p[j]*=d[j];
+ for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]*=d[j];
}
if (track->IsOn(AliESDtrack::kHMPIDpid)) {
- Double_t d[10];
+ Double_t d[AliPID::kSPECIES];
track->GetHMPIDpid(d);
- for (Int_t j=0; j<ns; j++) p[j]*=d[j];
+ for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]*=d[j];
}
track->SetESDpid(p);
//
Bool_t status = kFALSE;
- Double_t exptimes[5];
+ Double_t exptimes[AliPID::kSPECIESC];
track->GetIntegratedTimes(exptimes);
Float_t p = track->P();
track->GetInnerPxPyPz(ptpc);
Float_t momtpc=TMath::Sqrt(ptpc[0]*ptpc[0] + ptpc[1]*ptpc[1] + ptpc[2]*ptpc[2]);
- for(Int_t i=0;i < 5;i++){
+ for(Int_t i=0;i < AliPID::kSPECIES;i++){
AliPID::EParticleType type=AliPID::EParticleType(i);
Float_t resolutionTOF = fTOFResponse.GetExpectedSigma(p, exptimes[i], AliPID::ParticleMass(i));
Double_t expTime = fTOFResponse.GetExpectedSignal(vtrack,type);
return (tofTime - fTOFResponse.GetStartTime(vtrack->P()) - expTime)/fTOFResponse.GetExpectedSigma(vtrack->P(),expTime,AliPID::ParticleMassZ(type));
}
+
+//_________________________________________________________________________
+void AliESDpid::SetPIDForTracking(AliESDtrack *esdtr) const
+{
+ // assign mass for tracking
+ //
+
+ // in principle AliPIDCombined could be used to also set priors
+ //AliPIDCombined pidProb;
+ //pidProb.SetDetectorMask(kDetTPC); // use only TPC information, couls also be changed
+ //pidProb.SetSelectedSpecies(AliPID::kSPECIESC); // number of species to use
+ //pidProb.SetDefaultTPCPriors(); // load default priors
+
+ Double_t prob[AliPID::kSPECIESC]={0.};
+ EDetPidStatus pidStatus=ComputePIDProbability(kTPC, esdtr, AliPID::kSPECIESC, prob);
+ // check if a valid signal was found, otherwise return pion mass
+ if (pidStatus==kDetNoSignal) { //kDetPidOk) {
+ esdtr->SetPIDForTracking(AliPID::kPion);
+ return;
+ }
+
+ // or with AliPIDCombined
+ // pidProb.ComputeProbabilities(esdtr, this, p);
+
+ // find max probability
+ Float_t max=0.,min=1.e9;
+ Int_t pid=-1;
+ for (Int_t i=0; i<AliPID::kSPECIESC; ++i) {
+ if (prob[i]>max) {pid=i; max=prob[i];}
+ if (prob[i]<min) min=prob[i];
+ }
+
+ //int pid = AliPID::kPion; // this should be substituted by real most probable TPC pid (e,mu -> pion) or poin if no PID possible
+
+ //
+ if (pid>AliPID::kSPECIESC-1 || (min>=max)) pid = AliPID::kPion;
+ //
+ esdtr->SetPIDForTracking( pid );
+ //
+}
+
+
+//_________________________________________________________________________
+void AliESDpid::MakePIDForTracking(AliESDEvent *event) const
+{
+ // assign masses using for tracking
+ Int_t nTrk=event->GetNumberOfTracks();
+ for (Int_t iTrk=nTrk; iTrk--;) {
+ AliESDtrack *track = event->GetTrack(iTrk);
+ SetPIDForTracking(track);
+ }
+
+}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff