[u/mrichter/AliRoot.git] / STEER / ESD / AliESDpid.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

/* $Id$ */

//-----------------------------------------------------------------
//           Implementation of the combined PID class
//           For the Event Summary Data Class
//           produced by the reconstruction process
//           and containing information on the particle identification
//      Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
//-----------------------------------------------------------------

#include "TArrayI.h"
#include "TArrayF.h"

#include "TRandom.h"
#include "AliLog.h"
#include "AliPID.h"
#include "AliTOFHeader.h"
#include "AliESDpid.h"
#include "AliESDEvent.h"
#include "AliESDtrack.h"
#include "AliMCEvent.h"

#include <AliDetectorPID.h>

ClassImp(AliESDpid)

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
  //  
  //   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 nTrk=event->GetNumberOfTracks();
  for (Int_t iTrk=0; iTrk<nTrk; iTrk++) {  
    AliESDtrack *track=event->GetTrack(iTrk);
    MakeTPCPID(track);
    if (!TPConly) {
      MakeITSPID(track);
      MakeTOFPID(track, timeZeroTOF);
      //MakeHMPIDPID(track);
      //MakeTRDPID(track);
    }
    CombinePID(track);
  }
  return 0;
}
//_________________________________________________________________________
Float_t AliESDpid::GetTPCsignalTunedOnData(const AliVTrack *t) const {
    AliESDtrack *track = (AliESDtrack *) t;
    Float_t dedx = track->GetTPCsignalTunedOnData();

    if(dedx > 0) return dedx;

    dedx = t->GetTPCsignal();
    track->SetTPCsignalTunedOnData(dedx);
    if(dedx < 20) return dedx;

    AliPID::EParticleType type = AliPID::kPion;

    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)){
		type = AliPID::kElectron;
	    }
	    else if(iS==AliPID::ParticleCode(AliPID::kMuon)){
		type = AliPID::kMuon;
	    }
	    else if(iS==AliPID::ParticleCode(AliPID::kPion)){
		type = AliPID::kPion;
	    }
	    else if(iS==AliPID::ParticleCode(AliPID::kKaon)){
		type = AliPID::kKaon;
	    }
	    else if(iS==AliPID::ParticleCode(AliPID::kProton)){
		type = AliPID::kProton;
	    }
	    else if(iS==AliPID::ParticleCode(AliPID::kDeuteron)){ // d
		type = AliPID::kDeuteron;
	    }
	    else if(iS==AliPID::ParticleCode(AliPID::kTriton)){ // t
		type = AliPID::kTriton;
	    }
	    else if(iS==AliPID::ParticleCode(AliPID::kHe3)){ // 3He
		type = AliPID::kHe3;
	    }
	    else if(iS==AliPID::ParticleCode(AliPID::kAlpha)){ // 4He
		type = AliPID::kAlpha;
	    }
	    else
		kGood = kFALSE;

	    if(kGood){
        //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;
}
//_________________________________________________________________________
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

    tofSignal = t->GetTOFsignal() + fTOFResponse.GetTailRandomValue();
    track->SetTOFsignalTunedOnData(tofSignal);
    return (Float_t)tofSignal;
}
//_________________________________________________________________________
void AliESDpid::MakeTPCPID(AliESDtrack *track) const
{
  //
  //  TPC pid using bethe-bloch and gaussian response
  //
  if ((track->GetStatus()&AliESDtrack::kTPCin )==0)
    if ((track->GetStatus()&AliESDtrack::kTPCout)==0) return;

    Double_t mom = track->GetP();
    const AliExternalTrackParam *in=track->GetInnerParam();
    if (in) mom = in->GetP();

    Double_t p[AliPID::kSPECIES];
    Double_t dedx=track->GetTPCsignal(); 
    Bool_t mismatch=kTRUE, heavy=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,track->GetTPCsignalN(),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;
      }

      // Check for particles heavier than (AliPID::kSPECIES - 1)
      if (dedx < (bethe + fRange*sigma)) heavy=kFALSE;

    }

    if (mismatch)
       for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]=1./AliPID::kSPECIES;

    track->SetTPCpid(p);

    if (heavy) track->ResetStatus(AliESDtrack::kTPCpid);

}
//_________________________________________________________________________
void AliESDpid::MakeITSPID(AliESDtrack *track) const
{
  //
  // ITS PID
  // Two options, depending on fITSPIDmethod:
  //  1) Truncated mean method
  //  2) Likelihood, using charges measured in all 4 layers and 
  //     Landau+gaus response functions
  //

  if ((track->GetStatus()&AliESDtrack::kITSin)==0 &&
      (track->GetStatus()&AliESDtrack::kITSout)==0) return;

  Double_t mom=track->GetP();  
  if (fITSPIDmethod == kITSTruncMean) {
    Double_t dedx=track->GetITSsignal();
    Bool_t isSA=kTRUE;
    Double_t momITS=mom;
    ULong_t trStatus=track->GetStatus();
    if(trStatus&AliESDtrack::kTPCin) isSA=kFALSE;
    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
      track->ResetStatus(AliESDtrack::kITSpid);
      return;
    }

    Double_t p[10];

    Bool_t mismatch=kTRUE, heavy=kTRUE;
    for (Int_t j=0; j<AliPID::kSPECIES; j++) {
      Double_t mass=AliPID::ParticleMass(j);//GeV/c^2
      Double_t bethe=fITSResponse.Bethe(momITS,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 (dedx < (bethe + fRange*sigma)) heavy=kFALSE;

    }

    if (mismatch)
       for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]=1./AliPID::kSPECIES;

    track->SetITSpid(p);

    if (heavy) track->ResetStatus(AliESDtrack::kITSpid);
  }
  else {  // Likelihood method
    Double_t condprobfun[AliPID::kSPECIES];
    Double_t qclu[4];
    track->GetITSdEdxSamples(qclu);
    fITSResponse.GetITSProbabilities(mom,qclu,condprobfun);
    track->SetITSpid(condprobfun);
  }

}
//_________________________________________________________________________
void AliESDpid::MakeTOFPID(AliESDtrack *track, Float_t /*timeZeroTOF*/) const
{
  //
  //   TOF PID using gaussian response
  //

  if ((track->GetStatus()&AliESDtrack::kTOFout)==0) return;
  if ((track->GetStatus()&AliESDtrack::kTIME)==0) return;
  if ((track->GetStatus()&AliESDtrack::kITSin)==0) return;

  Int_t ibin = fTOFResponse.GetMomBin(track->GetP());
  Float_t timezero = fTOFResponse.GetT0bin(ibin);

  Double_t time[AliPID::kSPECIES];
  track->GetIntegratedTimes(time);

  Double_t sigma[AliPID::kSPECIES];
  for (Int_t iPart = 0; iPart < AliPID::kSPECIES; iPart++) {
    sigma[iPart] = fTOFResponse.GetExpectedSigma(track->GetP(),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 = track->GetTOFsignal() - timezero;

  Double_t p[AliPID::kSPECIES];
//   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) {
	p[j] = TMath::Exp(-0.5*(fRange+2)*(fRange+2))/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->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 (mismatch)
    for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]=1./AliPID::kSPECIES;
  */

  track->SetTOFpid(p);

  if (heavy) track->ResetStatus(AliESDtrack::kTOFpid);
  
  // 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];
  GetComputeTRDProbability(track, AliPID::kSPECIES, prob);
  track->SetTRDpid(prob);
}
//_________________________________________________________________________
void AliESDpid::CombinePID(AliESDtrack *track) const
{
  //
  // 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.};

  if (track->IsOn(AliESDtrack::kITSpid)) {
    Double_t d[10];
    track->GetITSpid(d);
    for (Int_t j=0; j<ns; j++) p[j]*=d[j];
  }

  if (track->IsOn(AliESDtrack::kTPCpid)) {
    Double_t d[10];
    track->GetTPCpid(d);
    for (Int_t j=0; j<ns; j++) p[j]*=d[j];
  }

  if (track->IsOn(AliESDtrack::kTRDpid)) {
    Double_t d[10];
    track->GetTRDpid(d);
    for (Int_t j=0; j<ns; j++) p[j]*=d[j];
  }

  if (track->IsOn(AliESDtrack::kTOFpid)) {
    Double_t d[10];
    track->GetTOFpid(d);
    for (Int_t j=0; j<ns; j++) p[j]*=d[j];
  }

  if (track->IsOn(AliESDtrack::kHMPIDpid)) {
    Double_t d[10];
    track->GetHMPIDpid(d);
    for (Int_t j=0; j<ns; j++) p[j]*=d[j];
  }

  track->SetESDpid(p);
}
//_________________________________________________________________________
Bool_t AliESDpid::CheckTOFMatching(AliESDtrack *track) const{
  //
  // Check pid matching of TOF with TPC as reference
  //
    Bool_t status = kFALSE;
    
    Double_t exptimes[5];
    track->GetIntegratedTimes(exptimes);
    
    Float_t p = track->P();
    
    Float_t dedx = track->GetTPCsignal();
    Float_t time = track->GetTOFsignal() - fTOFResponse.GetStartTime(p);
    
    Double_t ptpc[3];
    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++){
	AliPID::EParticleType type=AliPID::EParticleType(i);
	
	Float_t resolutionTOF = fTOFResponse.GetExpectedSigma(p, exptimes[i], AliPID::ParticleMass(i));
	if(TMath::Abs(exptimes[i] - time) < fRange * resolutionTOF){
	    Float_t dedxExp = fTPCResponse.GetExpectedSignal(momtpc,type);
	    Float_t resolutionTPC = fTPCResponse.GetExpectedSigma(momtpc,track->GetTPCsignalN(),type);
	    
	    if(TMath::Abs(dedx - dedxExp) < fRangeTOFMismatch * resolutionTPC){
		status = kTRUE;
	    }
	}
    }
    
    // for nuclei
    Float_t resolutionTOFpr = fTOFResponse.GetExpectedSigma(p, exptimes[4], AliPID::ParticleMass(4));
    if(!status && (exptimes[4] + fRange*resolutionTOFpr < time)) status = kTRUE;
    
    
    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));
}
Commit	Line	Data
8c6a71ab	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
4f679a16	16	/* $Id$ */
4f679a16	17
8c6a71ab	18	//-----------------------------------------------------------------
8c6a71ab	19	// Implementation of the combined PID class
4f679a16	20	// For the Event Summary Data Class
	21	// produced by the reconstruction process
	22	// and containing information on the particle identification
8c6a71ab	23	// Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
	24	//-----------------------------------------------------------------
	25
f858b00e	26	#include "TArrayI.h"
	27	#include "TArrayF.h"
	28
539a5a59	29	#include "TRandom.h"
10d100d4	30	#include "AliLog.h"
10d100d4	31	#include "AliPID.h"
f858b00e	32	#include "AliTOFHeader.h"
8c6a71ab	33	#include "AliESDpid.h"
af885e0f	34	#include "AliESDEvent.h"
8c6a71ab	35	#include "AliESDtrack.h"
539a5a59	36	#include "AliMCEvent.h"
539a5a59	37
00a38d07	38	#include <AliDetectorPID.h>
8c6a71ab	39
	40	ClassImp(AliESDpid)
	41
f858b00e	42	Int_t AliESDpid::MakePID(AliESDEvent *event, Bool_t TPConly, Float_t timeZeroTOF) const {
10d100d4	43	//
	44	// Calculate probabilities for all detectors, except if TPConly==kTRUE
	45	// and combine PID
	46	//
	47	// Option TPConly==kTRUE is used during reconstruction,
	48	// because ITS tracking uses TPC pid
	49	// HMPID and TRD pid are done in detector reconstructors
	50	//
	51
	52	/*
f858b00e	53	Float_t timeZeroTOF = 0;
10d100d4	54	if (subtractT0)
f858b00e	55	timeZeroTOF = event->GetT0();
10d100d4	56	*/
	57	Int_t nTrk=event->GetNumberOfTracks();
	58	for (Int_t iTrk=0; iTrk<nTrk; iTrk++) {
	59	AliESDtrack *track=event->GetTrack(iTrk);
	60	MakeTPCPID(track);
	61	if (!TPConly) {
	62	MakeITSPID(track);
f858b00e	63	MakeTOFPID(track, timeZeroTOF);
10d100d4	64	//MakeHMPIDPID(track);
ce5d6908	65	//MakeTRDPID(track);
10d100d4	66	}
	67	CombinePID(track);
	68	}
	69	return 0;
	70	}
8c6a71ab	71	//_________________________________________________________________________
539a5a59	72	Float_t AliESDpid::GetTPCsignalTunedOnData(const AliVTrack *t) const {
	73	AliESDtrack track = (AliESDtrack ) t;
	74	Float_t dedx = track->GetTPCsignalTunedOnData();
	75
	76	if(dedx > 0) return dedx;
	77
539a5a59	78	dedx = t->GetTPCsignal();
	79	track->SetTPCsignalTunedOnData(dedx);
	80	if(dedx < 20) return dedx;
	81
	82	AliPID::EParticleType type = AliPID::kPion;
	83
a864479b	84	AliMCEventHandler* eventHandler=dynamic_cast<AliMCEventHandler*>(fEventHandler);
539a5a59	85	if (eventHandler) {
	86	AliMCEvent* mcEvent = eventHandler->MCEvent();
	87	if(mcEvent){
	88	Bool_t kGood = kTRUE;
	89	AliMCParticle MCpart = (AliMCParticle ) mcEvent->GetTrack(TMath::Abs(t->GetLabel()));
	90	TParticle *part = MCpart->Particle();
	91
	92	Int_t iS = TMath::Abs(part->GetPdgCode());
	93
	94	if(iS==AliPID::ParticleCode(AliPID::kElectron)){
	95	type = AliPID::kElectron;
	96	}
	97	else if(iS==AliPID::ParticleCode(AliPID::kMuon)){
	98	type = AliPID::kMuon;
	99	}
	100	else if(iS==AliPID::ParticleCode(AliPID::kPion)){
	101	type = AliPID::kPion;
	102	}
	103	else if(iS==AliPID::ParticleCode(AliPID::kKaon)){
	104	type = AliPID::kKaon;
	105	}
	106	else if(iS==AliPID::ParticleCode(AliPID::kProton)){
	107	type = AliPID::kProton;
	108	}
	109	else if(iS==AliPID::ParticleCode(AliPID::kDeuteron)){ // d
	110	type = AliPID::kDeuteron;
	111	}
	112	else if(iS==AliPID::ParticleCode(AliPID::kTriton)){ // t
	113	type = AliPID::kTriton;
	114	}
	115	else if(iS==AliPID::ParticleCode(AliPID::kHe3)){ // 3He
	116	type = AliPID::kHe3;
	117	}
	118	else if(iS==AliPID::ParticleCode(AliPID::kAlpha)){ // 4He
	119	type = AliPID::kAlpha;
	120	}
	121	else
	122	kGood = kFALSE;
	123
	124	if(kGood){
f85a3764	125	//TODO maybe introduce different dEdxSources?
	126	Double_t bethe = fTPCResponse.GetExpectedSignal(track, type, AliTPCPIDResponse::kdEdxDefault, this->UseTPCEtaCorrection());
	127	Double_t sigma = fTPCResponse.GetExpectedSigma(track, type, AliTPCPIDResponse::kdEdxDefault, this->UseTPCEtaCorrection());
539a5a59	128	dedx = gRandom->Gaus(bethe,sigma);
567624b5	129	// if(iS == AliPID::ParticleCode(AliPID::kHe3) \|\| iS == AliPID::ParticleCode(AliPID::kAlpha)) dedx *= 5;
539a5a59	130	}
	131	}
	132	}
	133
	134	track->SetTPCsignalTunedOnData(dedx);
	135	return dedx;
	136	}
	137	//_________________________________________________________________________
a2c30af1	138	Float_t AliESDpid::GetTOFsignalTunedOnData(const AliVTrack *t) const {
	139	AliESDtrack track = (AliESDtrack ) t;
	140	Double_t tofSignal = track->GetTOFsignalTunedOnData();
	141
	142	if(tofSignal < 99999) return (Float_t)tofSignal; // it has been already set
	143
	144	tofSignal = t->GetTOFsignal() + fTOFResponse.GetTailRandomValue();
	145	track->SetTOFsignalTunedOnData(tofSignal);
	146	return (Float_t)tofSignal;
	147	}
	148	//_________________________________________________________________________
10d100d4	149	void AliESDpid::MakeTPCPID(AliESDtrack *track) const
8c6a71ab	150	{
4f679a16	151	//
10d100d4	152	// TPC pid using bethe-bloch and gaussian response
4f679a16	153	//
10d100d4	154	if ((track->GetStatus()&AliESDtrack::kTPCin )==0)
10d100d4	155	if ((track->GetStatus()&AliESDtrack::kTPCout)==0) return;
8c6a71ab	156
10d100d4	157	Double_t mom = track->GetP();
	158	const AliExternalTrackParam *in=track->GetInnerParam();
	159	if (in) mom = in->GetP();
8c6a71ab	160
10d100d4	161	Double_t p[AliPID::kSPECIES];
	162	Double_t dedx=track->GetTPCsignal();
	163	Bool_t mismatch=kTRUE, heavy=kTRUE;
8c6a71ab	164
10d100d4	165	for (Int_t j=0; j<AliPID::kSPECIES; j++) {
	166	AliPID::EParticleType type=AliPID::EParticleType(j);
	167	Double_t bethe=fTPCResponse.GetExpectedSignal(mom,type);
	168	Double_t sigma=fTPCResponse.GetExpectedSigma(mom,track->GetTPCsignalN(),type);
	169	if (TMath::Abs(dedx-bethe) > fRange*sigma) {
	170	p[j]=TMath::Exp(-0.5fRangefRange)/sigma;
	171	} else {
	172	p[j]=TMath::Exp(-0.5(dedx-bethe)(dedx-bethe)/(sigma*sigma))/sigma;
	173	mismatch=kFALSE;
	174	}
8c6a71ab	175
10d100d4	176	// Check for particles heavier than (AliPID::kSPECIES - 1)
10d100d4	177	if (dedx < (bethe + fRange*sigma)) heavy=kFALSE;
c630aafd	178
4a78b8c5	179	}
4a78b8c5	180
10d100d4	181	if (mismatch)
77638021	182	for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]=1./AliPID::kSPECIES;
10d100d4	183
	184	track->SetTPCpid(p);
	185
	186	if (heavy) track->ResetStatus(AliESDtrack::kTPCpid);
	187
	188	}
	189	//_________________________________________________________________________
	190	void AliESDpid::MakeITSPID(AliESDtrack *track) const
	191	{
	192	//
	193	// ITS PID
	194	// Two options, depending on fITSPIDmethod:
	195	// 1) Truncated mean method
	196	// 2) Likelihood, using charges measured in all 4 layers and
	197	// Landau+gaus response functions
	198	//
	199
	200	if ((track->GetStatus()&AliESDtrack::kITSin)==0 &&
	201	(track->GetStatus()&AliESDtrack::kITSout)==0) return;
	202
	203	Double_t mom=track->GetP();
	204	if (fITSPIDmethod == kITSTruncMean) {
	205	Double_t dedx=track->GetITSsignal();
15e979c9	206	Bool_t isSA=kTRUE;
	207	Double_t momITS=mom;
	208	ULong_t trStatus=track->GetStatus();
99daa709	209	if(trStatus&AliESDtrack::kTPCin) isSA=kFALSE;
15e979c9	210	UChar_t clumap=track->GetITSClusterMap();
	211	Int_t nPointsForPid=0;
	212	for(Int_t i=2; i<6; i++){
	213	if(clumap&(1<<i)) ++nPointsForPid;
	214	}
	215
	216	if(nPointsForPid<3) { // track not to be used for combined PID purposes
	217	track->ResetStatus(AliESDtrack::kITSpid);
	218	return;
	219	}
	220
10d100d4	221	Double_t p[10];
15e979c9	222
10d100d4	223	Bool_t mismatch=kTRUE, heavy=kTRUE;
	224	for (Int_t j=0; j<AliPID::kSPECIES; j++) {
	225	Double_t mass=AliPID::ParticleMass(j);//GeV/c^2
15e979c9	226	Double_t bethe=fITSResponse.Bethe(momITS,mass);
15e979c9	227	Double_t sigma=fITSResponse.GetResolution(bethe,nPointsForPid,isSA);
10d100d4	228	if (TMath::Abs(dedx-bethe) > fRange*sigma) {
	229	p[j]=TMath::Exp(-0.5fRangefRange)/sigma;
	230	} else {
	231	p[j]=TMath::Exp(-0.5(dedx-bethe)(dedx-bethe)/(sigma*sigma))/sigma;
	232	mismatch=kFALSE;
	233	}
	234
	235	// Check for particles heavier than (AliPID::kSPECIES - 1)
	236	if (dedx < (bethe + fRange*sigma)) heavy=kFALSE;
	237
4a78b8c5	238	}
c630aafd	239
10d100d4	240	if (mismatch)
	241	for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]=1./AliPID::kSPECIES;
	242
	243	track->SetITSpid(p);
	244
	245	if (heavy) track->ResetStatus(AliESDtrack::kITSpid);
	246	}
	247	else { // Likelihood method
	248	Double_t condprobfun[AliPID::kSPECIES];
	249	Double_t qclu[4];
	250	track->GetITSdEdxSamples(qclu);
	251	fITSResponse.GetITSProbabilities(mom,qclu,condprobfun);
	252	track->SetITSpid(condprobfun);
8c6a71ab	253	}
7a8614f3	254
10d100d4	255	}
10d100d4	256	//_________________________________________________________________________
f858b00e	257	void AliESDpid::MakeTOFPID(AliESDtrack track, Float_t /timeZeroTOF*/) const
10d100d4	258	{
	259	//
	260	// TOF PID using gaussian response
	261	//
f858b00e	262
10d100d4	263	if ((track->GetStatus()&AliESDtrack::kTOFout)==0) return;
10d100d4	264	if ((track->GetStatus()&AliESDtrack::kTIME)==0) return;
a512bf97	265	if ((track->GetStatus()&AliESDtrack::kITSin)==0) return;
10d100d4	266
f858b00e	267	Int_t ibin = fTOFResponse.GetMomBin(track->GetP());
	268	Float_t timezero = fTOFResponse.GetT0bin(ibin);
	269
00a38d07	270	Double_t time[AliPID::kSPECIES];
10d100d4	271	track->GetIntegratedTimes(time);
	272
	273	Double_t sigma[AliPID::kSPECIES];
	274	for (Int_t iPart = 0; iPart < AliPID::kSPECIES; iPart++) {
	275	sigma[iPart] = fTOFResponse.GetExpectedSigma(track->GetP(),time[iPart],AliPID::ParticleMass(iPart));
	276	}
	277
	278	AliDebugGeneral("AliESDpid::MakeTOFPID",2,
	279	Form("Expected TOF signals [ps]: %f %f %f %f %f",
	280	time[AliPID::kElectron],
	281	time[AliPID::kMuon],
	282	time[AliPID::kPion],
	283	time[AliPID::kKaon],
	284	time[AliPID::kProton]));
	285
	286	AliDebugGeneral("AliESDpid::MakeTOFPID",2,
	287	Form("Expected TOF std deviations [ps]: %f %f %f %f %f",
	288	sigma[AliPID::kElectron],
	289	sigma[AliPID::kMuon],
	290	sigma[AliPID::kPion],
	291	sigma[AliPID::kKaon],
	292	sigma[AliPID::kProton]
	293	));
	294
f858b00e	295	Double_t tof = track->GetTOFsignal() - timezero;
10d100d4	296
10d100d4	297	Double_t p[AliPID::kSPECIES];
355b831b	298	// Bool_t mismatch = kTRUE;
355b831b	299	Bool_t heavy = kTRUE;
10d100d4	300	for (Int_t j=0; j<AliPID::kSPECIES; j++) {
10d100d4	301	Double_t sig = sigma[j];
f858b00e	302	if (TMath::Abs(tof-time[j]) > (fRange+2)*sig) {
f858b00e	303	p[j] = TMath::Exp(-0.5(fRange+2)(fRange+2))/sig;
10d100d4	304	} else
	305	p[j] = TMath::Exp(-0.5(tof-time[j])(tof-time[j])/(sig*sig))/sig;
	306
	307	// Check the mismatching
ee251349	308
355b831b	309	// Double_t mass = AliPID::ParticleMass(j);
	310	// Double_t pm = fTOFResponse.GetMismatchProbability(track->GetP(),mass);
	311	// if (p[j]>pm) mismatch = kFALSE;
10d100d4	312
	313	// Check for particles heavier than (AliPID::kSPECIES - 1)
	314	if (tof < (time[j] + fRange*sig)) heavy=kFALSE;
	315
	316	}
	317
ee251349	318	/*
ee251349	319	if (mismatch)
77638021	320	for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]=1./AliPID::kSPECIES;
ee251349	321	*/
10d100d4	322
	323	track->SetTOFpid(p);
	324
ee251349	325	if (heavy) track->ResetStatus(AliESDtrack::kTOFpid);
f858b00e	326
784e3441	327	// kTOFmismatch flas is not set because deprecated from 18/02/2013
	328	// if (!CheckTOFMatching(track)) track->SetStatus(AliESDtrack::kTOFmismatch);
	329	// else track->ResetStatus(AliESDtrack::kTOFmismatch);
10d100d4	330	}
10d100d4	331	//_________________________________________________________________________
b439f460	332	void AliESDpid::MakeTRDPID(AliESDtrack *track) const
	333	{
	334	//
	335	// Method to recalculate the TRD PID probabilities
	336	//
ea235c90	337	Double_t prob[AliPID::kSPECIES];
1c9d11be	338	GetComputeTRDProbability(track, AliPID::kSPECIES, prob);
b439f460	339	track->SetTRDpid(prob);
	340	}
	341	//_________________________________________________________________________
10d100d4	342	void AliESDpid::CombinePID(AliESDtrack *track) const
	343	{
	344	//
	345	// Combine the information of various detectors
	346	// to determine the Particle Identification
	347	//
	348	Int_t ns=AliPID::kSPECIES;
	349	Double_t p[10]={1.,1.,1.,1.,1.,1.,1.,1.,1.,1.};
	350
	351	if (track->IsOn(AliESDtrack::kITSpid)) {
	352	Double_t d[10];
	353	track->GetITSpid(d);
	354	for (Int_t j=0; j<ns; j++) p[j]*=d[j];
	355	}
	356
	357	if (track->IsOn(AliESDtrack::kTPCpid)) {
	358	Double_t d[10];
	359	track->GetTPCpid(d);
	360	for (Int_t j=0; j<ns; j++) p[j]*=d[j];
	361	}
	362
	363	if (track->IsOn(AliESDtrack::kTRDpid)) {
	364	Double_t d[10];
	365	track->GetTRDpid(d);
	366	for (Int_t j=0; j<ns; j++) p[j]*=d[j];
	367	}
	368
	369	if (track->IsOn(AliESDtrack::kTOFpid)) {
	370	Double_t d[10];
	371	track->GetTOFpid(d);
	372	for (Int_t j=0; j<ns; j++) p[j]*=d[j];
	373	}
	374
	375	if (track->IsOn(AliESDtrack::kHMPIDpid)) {
	376	Double_t d[10];
	377	track->GetHMPIDpid(d);
	378	for (Int_t j=0; j<ns; j++) p[j]*=d[j];
	379	}
	380
	381	track->SetESDpid(p);
8c6a71ab	382	}
f858b00e	383	//_________________________________________________________________________
f858b00e	384	Bool_t AliESDpid::CheckTOFMatching(AliESDtrack *track) const{
ea235c90	385	//
	386	// Check pid matching of TOF with TPC as reference
	387	//
f858b00e	388	Bool_t status = kFALSE;
	389
	390	Double_t exptimes[5];
	391	track->GetIntegratedTimes(exptimes);
	392
f858b00e	393	Float_t p = track->P();
f858b00e	394
7170298c	395	Float_t dedx = track->GetTPCsignal();
	396	Float_t time = track->GetTOFsignal() - fTOFResponse.GetStartTime(p);
	397
f858b00e	398	Double_t ptpc[3];
	399	track->GetInnerPxPyPz(ptpc);
	400	Float_t momtpc=TMath::Sqrt(ptpc[0]ptpc[0] + ptpc[1]ptpc[1] + ptpc[2]*ptpc[2]);
	401
	402	for(Int_t i=0;i < 5;i++){
	403	AliPID::EParticleType type=AliPID::EParticleType(i);
	404
	405	Float_t resolutionTOF = fTOFResponse.GetExpectedSigma(p, exptimes[i], AliPID::ParticleMass(i));
	406	if(TMath::Abs(exptimes[i] - time) < fRange * resolutionTOF){
	407	Float_t dedxExp = fTPCResponse.GetExpectedSignal(momtpc,type);
	408	Float_t resolutionTPC = fTPCResponse.GetExpectedSigma(momtpc,track->GetTPCsignalN(),type);
	409
7170298c	410	if(TMath::Abs(dedx - dedxExp) < fRangeTOFMismatch * resolutionTPC){
f858b00e	411	status = kTRUE;
	412	}
	413	}
	414	}
	415
	416	// for nuclei
c1252298	417	Float_t resolutionTOFpr = fTOFResponse.GetExpectedSigma(p, exptimes[4], AliPID::ParticleMass(4));
c1252298	418	if(!status && (exptimes[4] + fRange*resolutionTOFpr < time)) status = kTRUE;
f858b00e	419
	420
	421	return status;
	422	}
00a38d07	423
567624b5	424	//_________________________________________________________________________
1d59271b	425	Float_t AliESDpid::GetSignalDeltaTOFold(const AliVParticle track, AliPID::EParticleType type, Bool_t ratio/=kFALSE*/) const
567624b5	426	{
	427	//
	428	// TOF signal - expected
	429	//
	430	AliVTrack vtrack=(AliVTrack)track;
	431
1d59271b	432	const Double_t expTime = fTOFResponse.GetExpectedSignal(vtrack,type);
a2c30af1	433	Double_t tofTime = 99999;
	434	if (fTuneMConData && ((fTuneMConDataMask & kDetTOF) == kDetTOF) ) tofTime = (Double_t)this->GetTOFsignalTunedOnData((AliVTrack*)vtrack);
	435	else tofTime=vtrack->GetTOFsignal();
	436	tofTime = tofTime - fTOFResponse.GetStartTime(vtrack->P());
1d59271b	437	Double_t delta=-9999.;
	438
	439	if (!ratio) delta=tofTime-expTime;
	440	else if (expTime>1.e-20) delta=tofTime/expTime;
	441
	442	return delta;
567624b5	443	}
	444
	445	//_________________________________________________________________________
355b831b	446	Float_t AliESDpid::GetNumberOfSigmasTOFold(const AliVParticle *track, AliPID::EParticleType type) const
00a38d07	447	{
	448	//
	449	// Number of sigma implementation for the TOF
	450	//
355b831b	451
00a38d07	452	AliVTrack vtrack=(AliVTrack)track;
a2c30af1	453	Double_t tofTime = 99999;
	454	if (fTuneMConData && ((fTuneMConDataMask & kDetTOF) == kDetTOF) ) tofTime = (Double_t)this->GetTOFsignalTunedOnData((AliVTrack*)vtrack);
	455	else tofTime=vtrack->GetTOFsignal();
355b831b	456
00a38d07	457	Double_t expTime = fTOFResponse.GetExpectedSignal(vtrack,type);
a2c30af1	458	return (tofTime - fTOFResponse.GetStartTime(vtrack->P()) - expTime)/fTOFResponse.GetExpectedSigma(vtrack->P(),expTime,AliPID::ParticleMassZ(type));
00a38d07	459	}