ClassImp(AliAODpidUtil)
- Int_t AliAODpidUtil::MakePID(const AliAODTrack *track,Double_t *p) const {
- //
- // Calculate probabilities for all detectors, except if TPConly==kTRUE
- // and combine PID
- //
- // Option TPConly==kTRUE is used during reconstruction,
- // because ITS tracking uses TPC pid
- // HMPID and TRD pid are done in detector reconstructors
- //
-
- /*
- Float_t TimeZeroTOF = 0;
- if (subtractT0)
- TimeZeroTOF = event->GetT0();
- */
- Int_t ns=AliPID::kSPECIES;
- Double_t tpcPid[AliPID::kSPECIES];
- MakeTPCPID(track,tpcPid);
- Double_t itsPid[AliPID::kSPECIES];
- Double_t tofPid[AliPID::kSPECIES];
- Double_t trdPid[AliPID::kSPECIES];
- MakeITSPID(track,itsPid);
- MakeTOFPID(track,tofPid);
- //MakeHMPIDPID(track);
- MakeTRDPID(track,trdPid);
- for (Int_t j=0; j<ns; j++) {
- p[j]=tpcPid[j]*itsPid[j]*tofPid[j]*trdPid[j];
- }
-
- return 0;
-}
//_________________________________________________________________________
Float_t AliAODpidUtil::GetTPCsignalTunedOnData(const AliVTrack *t) const {
AliAODTrack *track = (AliAODTrack *) t;
Float_t dedx = track->GetTPCsignalTunedOnData();
if(dedx > 0) return dedx;
- Double_t mom = t->GetTPCmomentum();
-
dedx = t->GetTPCsignal();
track->SetTPCsignalTunedOnData(dedx);
kGood = kFALSE;
if(kGood){
- Double_t bethe=fTPCResponse.GetExpectedSignal(mom,type);
- Double_t sigma=fTPCResponse.GetExpectedSigma(mom,t->GetTPCsignalN(),type);
- dedx = gRandom->Gaus(bethe,sigma);
-
- if(iS == AliPID::ParticleCode(AliPID::kHe3) || iS == AliPID::ParticleCode(AliPID::kAlpha)) dedx *= 5;
+ //TODO maybe introduce different dEdxSources?
+ Double_t bethe = fTPCResponse.GetExpectedSignal(track, type, AliTPCPIDResponse::kdEdxDefault, this->UseTPCEtaCorrection());
+ Double_t sigma = fTPCResponse.GetExpectedSigma(track, type, AliTPCPIDResponse::kdEdxDefault, this->UseTPCEtaCorrection());
+ dedx = gRandom->Gaus(bethe,sigma);
+
+// if(iS == AliPID::ParticleCode(AliPID::kHe3) || iS == AliPID::ParticleCode(AliPID::kAlpha)) dedx *= 5;
}
}
track->SetTPCsignalTunedOnData(dedx);
return dedx;
}
-//_________________________________________________________________________
-void AliAODpidUtil::MakeTPCPID(const AliAODTrack *track,Double_t *p) const
-{
- //
- // TPC pid using bethe-bloch and gaussian response
- //
-
- if ((track->GetStatus()&AliESDtrack::kTPCin )==0) return;
-
- AliAODPid *pidObj = track->GetDetPid();
- Double_t mom = track->P();
- Double_t dedx = 0.;
- UShort_t nTPCClus = 0;
- if (pidObj) {
- nTPCClus = pidObj->GetTPCsignalN();
- dedx = pidObj->GetTPCsignal();
- mom = pidObj->GetTPCmomentum();
- }
-
- Bool_t mismatch=kTRUE;
-
- for (Int_t j=0; j<AliPID::kSPECIES; j++) {
- AliPID::EParticleType type=AliPID::EParticleType(j);
- Double_t bethe=fTPCResponse.GetExpectedSignal(mom,type);
- Double_t sigma=fTPCResponse.GetExpectedSigma(mom,nTPCClus,type);
- if (TMath::Abs(dedx-bethe) > fRange*sigma) {
- p[j]=TMath::Exp(-0.5*fRange*fRange)/sigma;
- } else {
- p[j]=TMath::Exp(-0.5*(dedx-bethe)*(dedx-bethe)/(sigma*sigma))/sigma;
- mismatch=kFALSE;
- }
- }
-
- if (mismatch)
- for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]=1./AliPID::kSPECIES;
-
-
- return;
-}
//_________________________________________________________________________
-void AliAODpidUtil::MakeITSPID(const AliAODTrack *track,Double_t *p) const
+Float_t AliAODpidUtil::GetSignalDeltaTOFold(const AliVParticle *vtrack, AliPID::EParticleType type) const
{
//
- // ITS PID
- // 1) Truncated mean method
+ // Number of sigma implementation for the TOF
//
-
-
- if ((track->GetStatus()&AliESDtrack::kITSin)==0) return;
- UChar_t clumap=track->GetITSClusterMap();
- Int_t nPointsForPid=0;
- for(Int_t i=2; i<6; i++){
- if(clumap&(1<<i)) ++nPointsForPid;
- }
- if(nPointsForPid<3) { // track not to be used for combined PID purposes
- for (Int_t j=0; j<AliPID::kSPECIES; j++)
- p[j] = 1./AliPID::kSPECIES;
- return;
- }
- Double_t mom=track->P();
- AliAODPid *pidObj = track->GetDetPid();
-
- Double_t dedx = 0.;
- if (pidObj) {
- dedx = pidObj->GetITSsignal();
- }
- Bool_t mismatch = kTRUE;
- Bool_t isSA = kTRUE;
- if(track->GetStatus() & AliESDtrack::kTPCin){
- isSA = kFALSE;
- if (pidObj)
- mom = pidObj->GetTPCmomentum();
- }
- for (Int_t j=0; j<AliPID::kSPECIES; j++) {
- Double_t mass = AliPID::ParticleMass(j);//GeV/c^2
- Double_t bethe = fITSResponse.Bethe(mom,mass);
- Double_t sigma = fITSResponse.GetResolution(bethe,nPointsForPid,isSA);
- if (TMath::Abs(dedx-bethe) > fRange*sigma) {
- p[j]=TMath::Exp(-0.5*fRange*fRange)/sigma;
- } else {
- p[j]=TMath::Exp(-0.5*(dedx-bethe)*(dedx-bethe)/(sigma*sigma))/sigma;
- mismatch=kFALSE;
- }
-
- // Check for particles heavier than (AliPID::kSPECIES - 1)
-
- }
-
- if (mismatch)
- for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]=1./AliPID::kSPECIES;
-
- return;
-
-}
-//_________________________________________________________________________
-void AliAODpidUtil::MakeTOFPID(const AliAODTrack *track, Double_t *p) const
-{
- //
- // TOF PID using gaussian response
- //
- if ((track->GetStatus()&AliESDtrack::kTOFout )==0) return;
- if ((track->GetStatus()&AliESDtrack::kTIME )==0) return;
- if ((track->GetStatus()&AliESDtrack::kTOFpid )==0) return;
-
- Double_t time[AliPID::kSPECIES];
- Double_t sigma[AliPID::kSPECIES];
+ AliAODTrack *track=(AliAODTrack*)vtrack;
+
AliAODPid *pidObj = track->GetDetPid();
- pidObj->GetIntegratedTimes(time);
-
- for (Int_t iPart = 0; iPart < AliPID::kSPECIES; iPart++) {
- sigma[iPart] = fTOFResponse.GetExpectedSigma(track->P(),time[iPart],AliPID::ParticleMass(iPart));
- }
-
- AliDebugGeneral("AliESDpid::MakeTOFPID",2,
- Form("Expected TOF signals [ps]: %f %f %f %f %f",
- time[AliPID::kElectron],
- time[AliPID::kMuon],
- time[AliPID::kPion],
- time[AliPID::kKaon],
- time[AliPID::kProton]));
-
- AliDebugGeneral("AliESDpid::MakeTOFPID",2,
- Form("Expected TOF std deviations [ps]: %f %f %f %f %f",
- sigma[AliPID::kElectron],
- sigma[AliPID::kMuon],
- sigma[AliPID::kPion],
- sigma[AliPID::kKaon],
- sigma[AliPID::kProton]
- ));
-
- Double_t tof = pidObj->GetTOFsignal();
-
- Bool_t mismatch = kTRUE;
- for (Int_t j=0; j<AliPID::kSPECIES; j++) {
- Double_t sig = sigma[j];
- if (TMath::Abs(tof-time[j]) > fRange*sig) {
- p[j] = TMath::Exp(-0.5*fRange*fRange)/sig;
- } else
- p[j] = TMath::Exp(-0.5*(tof-time[j])*(tof-time[j])/(sig*sig))/sig;
-
- // Check the mismatching
- Double_t mass = AliPID::ParticleMass(j);
- Double_t pm = fTOFResponse.GetMismatchProbability(track->P(),mass);
- if (p[j]>pm) mismatch = kFALSE;
-
- // Check for particles heavier than (AliPID::kSPECIES - 1)
-
+ if (!pidObj) return -9999.;
+ Double_t tofTime=pidObj->GetTOFsignal();
+ const Double_t expTime=fTOFResponse.GetExpectedSignal((AliVTrack*)vtrack,type);
+ Double_t sigmaTOFPid[AliPID::kSPECIES];
+ pidObj->GetTOFpidResolution(sigmaTOFPid);
+ AliAODEvent *event=(AliAODEvent*)track->GetAODEvent();
+ if (event) { // protection if the user didn't call GetTrack, which sets the internal pointer
+ AliTOFHeader* tofH=(AliTOFHeader*)event->GetTOFHeader();
+ if (tofH && (TMath::Abs(sigmaTOFPid[0]) <= 1.E-16) ) { // new AOD
+ tofTime -= fTOFResponse.GetStartTime(vtrack->P());
+ }
+ } else {
+ AliError("pointer to AliAODEvent not found, please call GetTrack to set it");
+ return -9999.;
}
-
- if (mismatch)
- for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]=1./AliPID::kSPECIES;
-
- return;
-}
-//_________________________________________________________________________
-void AliAODpidUtil::MakeTRDPID(const AliAODTrack *track,Double_t *p) const
-{
- ComputeTRDProbability(track, AliPID::kSPECIES, p);
- return;
+
+ return tofTime - expTime;
}
//_________________________________________________________________________
-Float_t AliAODpidUtil::NumberOfSigmasTOF(const AliVParticle *vtrack, AliPID::EParticleType type) const
+Float_t AliAODpidUtil::GetNumberOfSigmasTOFold(const AliVParticle *vtrack, AliPID::EParticleType type) const
{
//
// Number of sigma implementation for the TOF
AliAODTrack *track=(AliAODTrack*)vtrack;
- // look for cached value first
- if (track->GetDetectorPID()){
- return track->GetDetectorPID()->GetNumberOfSigmas(kTOF, type);
- }
-
Bool_t oldAod=kTRUE;
- Double_t sigTOF;
+ Double_t sigTOF=0.;
AliAODPid *pidObj = track->GetDetPid();
if (!pidObj) return -999.;
Double_t tofTime=pidObj->GetTOFsignal();
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff