[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(),
                                                        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;
	    }
	}
    }

    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?
87da0205	126	Double_t bethe = fTPCResponse.GetExpectedSignal(track, type, AliTPCPIDResponse::kdEdxDefault, this->UseTPCEtaCorrection(),
	127	this->UseTPCMultiplicityCorrection());
	128	Double_t sigma = fTPCResponse.GetExpectedSigma(track, type, AliTPCPIDResponse::kdEdxDefault, this->UseTPCEtaCorrection(),
	129	this->UseTPCMultiplicityCorrection());
539a5a59	130	dedx = gRandom->Gaus(bethe,sigma);
567624b5	131	// if(iS == AliPID::ParticleCode(AliPID::kHe3) \|\| iS == AliPID::ParticleCode(AliPID::kAlpha)) dedx *= 5;
539a5a59	132	}
	133	}
	134	}
	135
	136	track->SetTPCsignalTunedOnData(dedx);
	137	return dedx;
	138	}
	139	//_________________________________________________________________________
a2c30af1	140	Float_t AliESDpid::GetTOFsignalTunedOnData(const AliVTrack *t) const {
	141	AliESDtrack track = (AliESDtrack ) t;
	142	Double_t tofSignal = track->GetTOFsignalTunedOnData();
	143
	144	if(tofSignal < 99999) return (Float_t)tofSignal; // it has been already set
	145
	146	tofSignal = t->GetTOFsignal() + fTOFResponse.GetTailRandomValue();
	147	track->SetTOFsignalTunedOnData(tofSignal);
	148	return (Float_t)tofSignal;
	149	}
	150	//_________________________________________________________________________
10d100d4	151	void AliESDpid::MakeTPCPID(AliESDtrack *track) const
8c6a71ab	152	{
4f679a16	153	//
10d100d4	154	// TPC pid using bethe-bloch and gaussian response
4f679a16	155	//
10d100d4	156	if ((track->GetStatus()&AliESDtrack::kTPCin )==0)
10d100d4	157	if ((track->GetStatus()&AliESDtrack::kTPCout)==0) return;
8c6a71ab	158
10d100d4	159	Double_t mom = track->GetP();
	160	const AliExternalTrackParam *in=track->GetInnerParam();
	161	if (in) mom = in->GetP();
8c6a71ab	162
10d100d4	163	Double_t p[AliPID::kSPECIES];
	164	Double_t dedx=track->GetTPCsignal();
	165	Bool_t mismatch=kTRUE, heavy=kTRUE;
8c6a71ab	166
10d100d4	167	for (Int_t j=0; j<AliPID::kSPECIES; j++) {
	168	AliPID::EParticleType type=AliPID::EParticleType(j);
	169	Double_t bethe=fTPCResponse.GetExpectedSignal(mom,type);
	170	Double_t sigma=fTPCResponse.GetExpectedSigma(mom,track->GetTPCsignalN(),type);
	171	if (TMath::Abs(dedx-bethe) > fRange*sigma) {
	172	p[j]=TMath::Exp(-0.5fRangefRange)/sigma;
	173	} else {
	174	p[j]=TMath::Exp(-0.5(dedx-bethe)(dedx-bethe)/(sigma*sigma))/sigma;
	175	mismatch=kFALSE;
	176	}
8c6a71ab	177
10d100d4	178	// Check for particles heavier than (AliPID::kSPECIES - 1)
10d100d4	179	if (dedx < (bethe + fRange*sigma)) heavy=kFALSE;
c630aafd	180
4a78b8c5	181	}
4a78b8c5	182
10d100d4	183	if (mismatch)
77638021	184	for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]=1./AliPID::kSPECIES;
10d100d4	185
	186	track->SetTPCpid(p);
	187
	188	if (heavy) track->ResetStatus(AliESDtrack::kTPCpid);
	189
	190	}
	191	//_________________________________________________________________________
	192	void AliESDpid::MakeITSPID(AliESDtrack *track) const
	193	{
	194	//
	195	// ITS PID
	196	// Two options, depending on fITSPIDmethod:
	197	// 1) Truncated mean method
	198	// 2) Likelihood, using charges measured in all 4 layers and
	199	// Landau+gaus response functions
	200	//
	201
	202	if ((track->GetStatus()&AliESDtrack::kITSin)==0 &&
	203	(track->GetStatus()&AliESDtrack::kITSout)==0) return;
	204
	205	Double_t mom=track->GetP();
	206	if (fITSPIDmethod == kITSTruncMean) {
	207	Double_t dedx=track->GetITSsignal();
15e979c9	208	Bool_t isSA=kTRUE;
	209	Double_t momITS=mom;
	210	ULong_t trStatus=track->GetStatus();
99daa709	211	if(trStatus&AliESDtrack::kTPCin) isSA=kFALSE;
15e979c9	212	UChar_t clumap=track->GetITSClusterMap();
	213	Int_t nPointsForPid=0;
	214	for(Int_t i=2; i<6; i++){
	215	if(clumap&(1<<i)) ++nPointsForPid;
	216	}
	217
	218	if(nPointsForPid<3) { // track not to be used for combined PID purposes
	219	track->ResetStatus(AliESDtrack::kITSpid);
	220	return;
	221	}
	222
10d100d4	223	Double_t p[10];
15e979c9	224
10d100d4	225	Bool_t mismatch=kTRUE, heavy=kTRUE;
	226	for (Int_t j=0; j<AliPID::kSPECIES; j++) {
	227	Double_t mass=AliPID::ParticleMass(j);//GeV/c^2
15e979c9	228	Double_t bethe=fITSResponse.Bethe(momITS,mass);
15e979c9	229	Double_t sigma=fITSResponse.GetResolution(bethe,nPointsForPid,isSA);
10d100d4	230	if (TMath::Abs(dedx-bethe) > fRange*sigma) {
	231	p[j]=TMath::Exp(-0.5fRangefRange)/sigma;
	232	} else {
	233	p[j]=TMath::Exp(-0.5(dedx-bethe)(dedx-bethe)/(sigma*sigma))/sigma;
	234	mismatch=kFALSE;
	235	}
	236
	237	// Check for particles heavier than (AliPID::kSPECIES - 1)
	238	if (dedx < (bethe + fRange*sigma)) heavy=kFALSE;
	239
4a78b8c5	240	}
c630aafd	241
10d100d4	242	if (mismatch)
	243	for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]=1./AliPID::kSPECIES;
	244
	245	track->SetITSpid(p);
	246
	247	if (heavy) track->ResetStatus(AliESDtrack::kITSpid);
	248	}
	249	else { // Likelihood method
	250	Double_t condprobfun[AliPID::kSPECIES];
	251	Double_t qclu[4];
	252	track->GetITSdEdxSamples(qclu);
	253	fITSResponse.GetITSProbabilities(mom,qclu,condprobfun);
	254	track->SetITSpid(condprobfun);
8c6a71ab	255	}
7a8614f3	256
10d100d4	257	}
10d100d4	258	//_________________________________________________________________________
f858b00e	259	void AliESDpid::MakeTOFPID(AliESDtrack track, Float_t /timeZeroTOF*/) const
10d100d4	260	{
	261	//
	262	// TOF PID using gaussian response
	263	//
f858b00e	264
10d100d4	265	if ((track->GetStatus()&AliESDtrack::kTOFout)==0) return;
10d100d4	266	if ((track->GetStatus()&AliESDtrack::kTIME)==0) return;
a512bf97	267	if ((track->GetStatus()&AliESDtrack::kITSin)==0) return;
10d100d4	268
f858b00e	269	Int_t ibin = fTOFResponse.GetMomBin(track->GetP());
	270	Float_t timezero = fTOFResponse.GetT0bin(ibin);
	271
00a38d07	272	Double_t time[AliPID::kSPECIES];
10d100d4	273	track->GetIntegratedTimes(time);
	274
	275	Double_t sigma[AliPID::kSPECIES];
	276	for (Int_t iPart = 0; iPart < AliPID::kSPECIES; iPart++) {
	277	sigma[iPart] = fTOFResponse.GetExpectedSigma(track->GetP(),time[iPart],AliPID::ParticleMass(iPart));
	278	}
	279
	280	AliDebugGeneral("AliESDpid::MakeTOFPID",2,
	281	Form("Expected TOF signals [ps]: %f %f %f %f %f",
	282	time[AliPID::kElectron],
	283	time[AliPID::kMuon],
	284	time[AliPID::kPion],
	285	time[AliPID::kKaon],
	286	time[AliPID::kProton]));
	287
	288	AliDebugGeneral("AliESDpid::MakeTOFPID",2,
	289	Form("Expected TOF std deviations [ps]: %f %f %f %f %f",
	290	sigma[AliPID::kElectron],
	291	sigma[AliPID::kMuon],
	292	sigma[AliPID::kPion],
	293	sigma[AliPID::kKaon],
	294	sigma[AliPID::kProton]
	295	));
	296
f858b00e	297	Double_t tof = track->GetTOFsignal() - timezero;
10d100d4	298
10d100d4	299	Double_t p[AliPID::kSPECIES];
355b831b	300	// Bool_t mismatch = kTRUE;
355b831b	301	Bool_t heavy = kTRUE;
10d100d4	302	for (Int_t j=0; j<AliPID::kSPECIES; j++) {
10d100d4	303	Double_t sig = sigma[j];
f858b00e	304	if (TMath::Abs(tof-time[j]) > (fRange+2)*sig) {
f858b00e	305	p[j] = TMath::Exp(-0.5(fRange+2)(fRange+2))/sig;
10d100d4	306	} else
	307	p[j] = TMath::Exp(-0.5(tof-time[j])(tof-time[j])/(sig*sig))/sig;
	308
	309	// Check the mismatching
ee251349	310
355b831b	311	// Double_t mass = AliPID::ParticleMass(j);
	312	// Double_t pm = fTOFResponse.GetMismatchProbability(track->GetP(),mass);
	313	// if (p[j]>pm) mismatch = kFALSE;
10d100d4	314
	315	// Check for particles heavier than (AliPID::kSPECIES - 1)
	316	if (tof < (time[j] + fRange*sig)) heavy=kFALSE;
	317
	318	}
	319
ee251349	320	/*
ee251349	321	if (mismatch)
77638021	322	for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]=1./AliPID::kSPECIES;
ee251349	323	*/
10d100d4	324
	325	track->SetTOFpid(p);
	326
ee251349	327	if (heavy) track->ResetStatus(AliESDtrack::kTOFpid);
f858b00e	328
784e3441	329	// kTOFmismatch flas is not set because deprecated from 18/02/2013
	330	// if (!CheckTOFMatching(track)) track->SetStatus(AliESDtrack::kTOFmismatch);
	331	// else track->ResetStatus(AliESDtrack::kTOFmismatch);
10d100d4	332	}
10d100d4	333	//_________________________________________________________________________
b439f460	334	void AliESDpid::MakeTRDPID(AliESDtrack *track) const
	335	{
	336	//
	337	// Method to recalculate the TRD PID probabilities
	338	//
ea235c90	339	Double_t prob[AliPID::kSPECIES];
1c9d11be	340	GetComputeTRDProbability(track, AliPID::kSPECIES, prob);
b439f460	341	track->SetTRDpid(prob);
	342	}
	343	//_________________________________________________________________________
10d100d4	344	void AliESDpid::CombinePID(AliESDtrack *track) const
	345	{
	346	//
	347	// Combine the information of various detectors
	348	// to determine the Particle Identification
	349	//
	350	Int_t ns=AliPID::kSPECIES;
	351	Double_t p[10]={1.,1.,1.,1.,1.,1.,1.,1.,1.,1.};
	352
	353	if (track->IsOn(AliESDtrack::kITSpid)) {
	354	Double_t d[10];
	355	track->GetITSpid(d);
	356	for (Int_t j=0; j<ns; j++) p[j]*=d[j];
	357	}
	358
	359	if (track->IsOn(AliESDtrack::kTPCpid)) {
	360	Double_t d[10];
	361	track->GetTPCpid(d);
	362	for (Int_t j=0; j<ns; j++) p[j]*=d[j];
	363	}
	364
	365	if (track->IsOn(AliESDtrack::kTRDpid)) {
	366	Double_t d[10];
	367	track->GetTRDpid(d);
	368	for (Int_t j=0; j<ns; j++) p[j]*=d[j];
	369	}
	370
	371	if (track->IsOn(AliESDtrack::kTOFpid)) {
	372	Double_t d[10];
	373	track->GetTOFpid(d);
	374	for (Int_t j=0; j<ns; j++) p[j]*=d[j];
	375	}
	376
	377	if (track->IsOn(AliESDtrack::kHMPIDpid)) {
	378	Double_t d[10];
	379	track->GetHMPIDpid(d);
	380	for (Int_t j=0; j<ns; j++) p[j]*=d[j];
	381	}
	382
	383	track->SetESDpid(p);
8c6a71ab	384	}
f858b00e	385	//_________________________________________________________________________
f858b00e	386	Bool_t AliESDpid::CheckTOFMatching(AliESDtrack *track) const{
ea235c90	387	//
	388	// Check pid matching of TOF with TPC as reference
	389	//
f858b00e	390	Bool_t status = kFALSE;
	391
	392	Double_t exptimes[5];
	393	track->GetIntegratedTimes(exptimes);
	394
f858b00e	395	Float_t p = track->P();
f858b00e	396
7170298c	397	Float_t dedx = track->GetTPCsignal();
	398	Float_t time = track->GetTOFsignal() - fTOFResponse.GetStartTime(p);
	399
f858b00e	400	Double_t ptpc[3];
	401	track->GetInnerPxPyPz(ptpc);
	402	Float_t momtpc=TMath::Sqrt(ptpc[0]ptpc[0] + ptpc[1]ptpc[1] + ptpc[2]*ptpc[2]);
	403
	404	for(Int_t i=0;i < 5;i++){
	405	AliPID::EParticleType type=AliPID::EParticleType(i);
	406
	407	Float_t resolutionTOF = fTOFResponse.GetExpectedSigma(p, exptimes[i], AliPID::ParticleMass(i));
	408	if(TMath::Abs(exptimes[i] - time) < fRange * resolutionTOF){
	409	Float_t dedxExp = fTPCResponse.GetExpectedSignal(momtpc,type);
	410	Float_t resolutionTPC = fTPCResponse.GetExpectedSigma(momtpc,track->GetTPCsignalN(),type);
	411
7170298c	412	if(TMath::Abs(dedx - dedxExp) < fRangeTOFMismatch * resolutionTPC){
f858b00e	413	status = kTRUE;
	414	}
	415	}
	416	}
	417
	418	// for nuclei
c1252298	419	Float_t resolutionTOFpr = fTOFResponse.GetExpectedSigma(p, exptimes[4], AliPID::ParticleMass(4));
c1252298	420	if(!status && (exptimes[4] + fRange*resolutionTOFpr < time)) status = kTRUE;
f858b00e	421
	422
	423	return status;
	424	}
00a38d07	425
567624b5	426	//_________________________________________________________________________
1d59271b	427	Float_t AliESDpid::GetSignalDeltaTOFold(const AliVParticle track, AliPID::EParticleType type, Bool_t ratio/=kFALSE*/) const
567624b5	428	{
	429	//
	430	// TOF signal - expected
	431	//
	432	AliVTrack vtrack=(AliVTrack)track;
	433
1d59271b	434	const Double_t expTime = fTOFResponse.GetExpectedSignal(vtrack,type);
a2c30af1	435	Double_t tofTime = 99999;
	436	if (fTuneMConData && ((fTuneMConDataMask & kDetTOF) == kDetTOF) ) tofTime = (Double_t)this->GetTOFsignalTunedOnData((AliVTrack*)vtrack);
	437	else tofTime=vtrack->GetTOFsignal();
	438	tofTime = tofTime - fTOFResponse.GetStartTime(vtrack->P());
1d59271b	439	Double_t delta=-9999.;
	440
	441	if (!ratio) delta=tofTime-expTime;
	442	else if (expTime>1.e-20) delta=tofTime/expTime;
	443
	444	return delta;
567624b5	445	}
	446
	447	//_________________________________________________________________________
355b831b	448	Float_t AliESDpid::GetNumberOfSigmasTOFold(const AliVParticle *track, AliPID::EParticleType type) const
00a38d07	449	{
	450	//
	451	// Number of sigma implementation for the TOF
	452	//
355b831b	453
00a38d07	454	AliVTrack vtrack=(AliVTrack)track;
a2c30af1	455	Double_t tofTime = 99999;
	456	if (fTuneMConData && ((fTuneMConDataMask & kDetTOF) == kDetTOF) ) tofTime = (Double_t)this->GetTOFsignalTunedOnData((AliVTrack*)vtrack);
	457	else tofTime=vtrack->GetTOFsignal();
355b831b	458
00a38d07	459	Double_t expTime = fTOFResponse.GetExpectedSignal(vtrack,type);
a2c30af1	460	return (tofTime - fTOFResponse.GetStartTime(vtrack->P()) - expTime)/fTOFResponse.GetExpectedSigma(vtrack->P(),expTime,AliPID::ParticleMassZ(type));
00a38d07	461	}