* 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
#include "AliESDEvent.h"
#include "AliESDtrack.h"
#include "AliMCEvent.h"
-#include "AliMCEventHandler.h"
-#include "AliAnalysisManager.h"
+#include "AliTOFPIDParams.h"
+#include <AliDetectorPID.h>
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(dedx > 0) return dedx;
- Double_t mom = t->GetTPCmomentum();
dedx = t->GetTPCsignal();
track->SetTPCsignalTunedOnData(dedx);
if(dedx < 20) return dedx;
AliPID::EParticleType type = AliPID::kPion;
- AliMCEventHandler* eventHandler=NULL;
- eventHandler = dynamic_cast<AliMCEventHandler*> (AliAnalysisManager::GetAnalysisManager()->GetMCtruthEventHandler());
+ AliMCEventHandler* eventHandler=dynamic_cast<AliMCEventHandler*>(fEventHandler);
if (eventHandler) {
AliMCEvent* mcEvent = eventHandler->MCEvent();
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){
- Double_t bethe=fTPCResponse.GetExpectedSignal(mom,type);
- Double_t sigma=fTPCResponse.GetExpectedSigma(mom,t->GetTPCsignalN(),type);
+ //TODO maybe introduce different dEdxSources?
+ Double_t bethe = fTPCResponse.GetExpectedSignal(track, type, AliTPCPIDResponse::kdEdxDefault, this->UseTPCEtaCorrection(),
+ this->UseTPCMultiplicityCorrection());
+ Double_t sigma = fTPCResponse.GetExpectedSigma(track, type, AliTPCPIDResponse::kdEdxDefault, this->UseTPCEtaCorrection(),
+ this->UseTPCMultiplicityCorrection());
dedx = gRandom->Gaus(bethe,sigma);
- if(iS == AliPID::ParticleCode(AliPID::kHe3) || iS == AliPID::ParticleCode(AliPID::kAlpha)) dedx *= 5;
+// if(iS == AliPID::ParticleCode(AliPID::kHe3) || iS == AliPID::ParticleCode(AliPID::kAlpha)) dedx *= 5;
}
}
}
return dedx;
}
//_________________________________________________________________________
+Float_t AliESDpid::GetTOFsignalTunedOnData(const AliVTrack *t) const {
+ AliESDtrack *track = (AliESDtrack *) t;
+ Double_t tofSignal = track->GetTOFsignalTunedOnData();
+
+ if(tofSignal < 99999) return (Float_t)tofSignal; // it has been already set
+ // read additional mismatch fraction
+ Float_t addmism = GetTOFPIDParams()->GetTOFadditionalMismForMC();
+ if(addmism > 1.){
+ Float_t centr = GetCurrentCentrality();
+ if(centr > 50) addmism *= 0.1667;
+ else if(centr > 20) addmism *= 0.33;
+ }
+
+ tofSignal = t->GetTOFsignal() + fTOFResponse.GetTailRandomValue(t->Pt(),t->Eta(),t->GetTOFsignal(),addmism);
+ track->SetTOFsignalTunedOnData(tofSignal);
+ return (Float_t)tofSignal;
+}
+//_________________________________________________________________________
void AliESDpid::MakeTPCPID(AliESDtrack *track) const
{
//
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::kSPECIESN];
+ Double_t time[AliPID::kSPECIESC];
track->GetIntegratedTimes(time);
Double_t sigma[AliPID::kSPECIES];
Double_t tof = track->GetTOFsignal() - timezero;
Double_t p[AliPID::kSPECIES];
- Bool_t mismatch = kTRUE, heavy = kTRUE;
+// Bool_t mismatch = kTRUE;
+ Bool_t heavy = kTRUE;
for (Int_t j=0; j<AliPID::kSPECIES; j++) {
Double_t sig = sigma[j];
if (TMath::Abs(tof-time[j]) > (fRange+2)*sig) {
// Check the mismatching
- Double_t mass = AliPID::ParticleMass(j);
- Double_t pm = fTOFResponse.GetMismatchProbability(track->GetP(),mass);
- if (p[j]>pm) mismatch = kFALSE;
+// Double_t mass = AliPID::ParticleMass(j);
+// Double_t pm = fTOFResponse.GetMismatchProbability(track->GetP(),mass);
+// if (p[j]>pm) mismatch = kFALSE;
// Check for particles heavier than (AliPID::kSPECIES - 1)
if (tof < (time[j] + fRange*sig)) heavy=kFALSE;
if (heavy) track->ResetStatus(AliESDtrack::kTOFpid);
- if (!CheckTOFMatching(track)) track->SetStatus(AliESDtrack::kTOFmismatch);
- else track->ResetStatus(AliESDtrack::kTOFmismatch);
+ // kTOFmismatch flas is not set because deprecated from 18/02/2013
+ // if (!CheckTOFMatching(track)) track->SetStatus(AliESDtrack::kTOFmismatch);
+ // else track->ResetStatus(AliESDtrack::kTOFmismatch);
}
//_________________________________________________________________________
void AliESDpid::MakeTRDPID(AliESDtrack *track) const
// Method to recalculate the TRD PID probabilities
//
Double_t prob[AliPID::kSPECIES];
- ComputeTRDProbability(track, AliPID::kSPECIES, prob);
+ GetComputeTRDProbability(track, AliPID::kSPECIES, prob);
track->SetTRDpid(prob);
}
//_________________________________________________________________________
// 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));
return status;
}
+
+//_________________________________________________________________________
+Float_t AliESDpid::GetSignalDeltaTOFold(const AliVParticle *track, AliPID::EParticleType type, Bool_t ratio/*=kFALSE*/) const
+{
+ //
+ // TOF signal - expected
+ //
+ AliVTrack *vtrack=(AliVTrack*)track;
+
+ const Double_t expTime = fTOFResponse.GetExpectedSignal(vtrack,type);
+ Double_t tofTime = 99999;
+ if (fTuneMConData && ((fTuneMConDataMask & kDetTOF) == kDetTOF) ) tofTime = (Double_t)this->GetTOFsignalTunedOnData((AliVTrack*)vtrack);
+ else tofTime=vtrack->GetTOFsignal();
+ tofTime = tofTime - fTOFResponse.GetStartTime(vtrack->P());
+ Double_t delta=-9999.;
+
+ if (!ratio) delta=tofTime-expTime;
+ else if (expTime>1.e-20) delta=tofTime/expTime;
+
+ return delta;
+}
+
+//_________________________________________________________________________
+Float_t AliESDpid::GetNumberOfSigmasTOFold(const AliVParticle *track, AliPID::EParticleType type) const
+{
+ //
+ // Number of sigma implementation for the TOF
+ //
+
+ AliVTrack *vtrack=(AliVTrack*)track;
+ Double_t tofTime = 99999;
+ if (fTuneMConData && ((fTuneMConDataMask & kDetTOF) == kDetTOF) ) tofTime = (Double_t)this->GetTOFsignalTunedOnData((AliVTrack*)vtrack);
+ else tofTime=vtrack->GetTOFsignal();
+
+ 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