[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 "AliLog.h"
#include "AliPID.h"
#include "AliTOFHeader.h"
#include "AliESDpid.h"
#include "AliESDEvent.h"
#include "AliESDtrack.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;
}
//_________________________________________________________________________
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::kSPECIESN];
  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, 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);
  
  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);
  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;
}
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
10d100d4	29	#include "AliLog.h"
10d100d4	30	#include "AliPID.h"
f858b00e	31	#include "AliTOFHeader.h"
8c6a71ab	32	#include "AliESDpid.h"
af885e0f	33	#include "AliESDEvent.h"
8c6a71ab	34	#include "AliESDtrack.h"
	35
	36	ClassImp(AliESDpid)
	37
f858b00e	38	Int_t AliESDpid::MakePID(AliESDEvent *event, Bool_t TPConly, Float_t timeZeroTOF) const {
10d100d4	39	//
	40	// Calculate probabilities for all detectors, except if TPConly==kTRUE
	41	// and combine PID
	42	//
	43	// Option TPConly==kTRUE is used during reconstruction,
	44	// because ITS tracking uses TPC pid
	45	// HMPID and TRD pid are done in detector reconstructors
	46	//
	47
	48	/*
f858b00e	49	Float_t timeZeroTOF = 0;
10d100d4	50	if (subtractT0)
f858b00e	51	timeZeroTOF = event->GetT0();
10d100d4	52	*/
	53	Int_t nTrk=event->GetNumberOfTracks();
	54	for (Int_t iTrk=0; iTrk<nTrk; iTrk++) {
	55	AliESDtrack *track=event->GetTrack(iTrk);
	56	MakeTPCPID(track);
	57	if (!TPConly) {
	58	MakeITSPID(track);
f858b00e	59	MakeTOFPID(track, timeZeroTOF);
10d100d4	60	//MakeHMPIDPID(track);
ce5d6908	61	//MakeTRDPID(track);
10d100d4	62	}
	63	CombinePID(track);
	64	}
	65	return 0;
	66	}
8c6a71ab	67	//_________________________________________________________________________
10d100d4	68	void AliESDpid::MakeTPCPID(AliESDtrack *track) const
8c6a71ab	69	{
4f679a16	70	//
10d100d4	71	// TPC pid using bethe-bloch and gaussian response
4f679a16	72	//
10d100d4	73	if ((track->GetStatus()&AliESDtrack::kTPCin )==0)
10d100d4	74	if ((track->GetStatus()&AliESDtrack::kTPCout)==0) return;
8c6a71ab	75
10d100d4	76	Double_t mom = track->GetP();
	77	const AliExternalTrackParam *in=track->GetInnerParam();
	78	if (in) mom = in->GetP();
8c6a71ab	79
10d100d4	80	Double_t p[AliPID::kSPECIES];
	81	Double_t dedx=track->GetTPCsignal();
	82	Bool_t mismatch=kTRUE, heavy=kTRUE;
8c6a71ab	83
10d100d4	84	for (Int_t j=0; j<AliPID::kSPECIES; j++) {
	85	AliPID::EParticleType type=AliPID::EParticleType(j);
	86	Double_t bethe=fTPCResponse.GetExpectedSignal(mom,type);
	87	Double_t sigma=fTPCResponse.GetExpectedSigma(mom,track->GetTPCsignalN(),type);
	88	if (TMath::Abs(dedx-bethe) > fRange*sigma) {
	89	p[j]=TMath::Exp(-0.5fRangefRange)/sigma;
	90	} else {
	91	p[j]=TMath::Exp(-0.5(dedx-bethe)(dedx-bethe)/(sigma*sigma))/sigma;
	92	mismatch=kFALSE;
	93	}
8c6a71ab	94
10d100d4	95	// Check for particles heavier than (AliPID::kSPECIES - 1)
10d100d4	96	if (dedx < (bethe + fRange*sigma)) heavy=kFALSE;
c630aafd	97
4a78b8c5	98	}
4a78b8c5	99
10d100d4	100	if (mismatch)
77638021	101	for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]=1./AliPID::kSPECIES;
10d100d4	102
	103	track->SetTPCpid(p);
	104
	105	if (heavy) track->ResetStatus(AliESDtrack::kTPCpid);
	106
	107	}
	108	//_________________________________________________________________________
	109	void AliESDpid::MakeITSPID(AliESDtrack *track) const
	110	{
	111	//
	112	// ITS PID
	113	// Two options, depending on fITSPIDmethod:
	114	// 1) Truncated mean method
	115	// 2) Likelihood, using charges measured in all 4 layers and
	116	// Landau+gaus response functions
	117	//
	118
	119	if ((track->GetStatus()&AliESDtrack::kITSin)==0 &&
	120	(track->GetStatus()&AliESDtrack::kITSout)==0) return;
	121
	122	Double_t mom=track->GetP();
	123	if (fITSPIDmethod == kITSTruncMean) {
	124	Double_t dedx=track->GetITSsignal();
15e979c9	125	Bool_t isSA=kTRUE;
	126	Double_t momITS=mom;
	127	ULong_t trStatus=track->GetStatus();
99daa709	128	if(trStatus&AliESDtrack::kTPCin) isSA=kFALSE;
15e979c9	129	UChar_t clumap=track->GetITSClusterMap();
	130	Int_t nPointsForPid=0;
	131	for(Int_t i=2; i<6; i++){
	132	if(clumap&(1<<i)) ++nPointsForPid;
	133	}
	134
	135	if(nPointsForPid<3) { // track not to be used for combined PID purposes
	136	track->ResetStatus(AliESDtrack::kITSpid);
	137	return;
	138	}
	139
10d100d4	140	Double_t p[10];
15e979c9	141
10d100d4	142	Bool_t mismatch=kTRUE, heavy=kTRUE;
	143	for (Int_t j=0; j<AliPID::kSPECIES; j++) {
	144	Double_t mass=AliPID::ParticleMass(j);//GeV/c^2
15e979c9	145	Double_t bethe=fITSResponse.Bethe(momITS,mass);
15e979c9	146	Double_t sigma=fITSResponse.GetResolution(bethe,nPointsForPid,isSA);
10d100d4	147	if (TMath::Abs(dedx-bethe) > fRange*sigma) {
	148	p[j]=TMath::Exp(-0.5fRangefRange)/sigma;
	149	} else {
	150	p[j]=TMath::Exp(-0.5(dedx-bethe)(dedx-bethe)/(sigma*sigma))/sigma;
	151	mismatch=kFALSE;
	152	}
	153
	154	// Check for particles heavier than (AliPID::kSPECIES - 1)
	155	if (dedx < (bethe + fRange*sigma)) heavy=kFALSE;
	156
4a78b8c5	157	}
c630aafd	158
10d100d4	159	if (mismatch)
	160	for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]=1./AliPID::kSPECIES;
	161
	162	track->SetITSpid(p);
	163
	164	if (heavy) track->ResetStatus(AliESDtrack::kITSpid);
	165	}
	166	else { // Likelihood method
	167	Double_t condprobfun[AliPID::kSPECIES];
	168	Double_t qclu[4];
	169	track->GetITSdEdxSamples(qclu);
	170	fITSResponse.GetITSProbabilities(mom,qclu,condprobfun);
	171	track->SetITSpid(condprobfun);
8c6a71ab	172	}
7a8614f3	173
10d100d4	174	}
10d100d4	175	//_________________________________________________________________________
f858b00e	176	void AliESDpid::MakeTOFPID(AliESDtrack track, Float_t /timeZeroTOF*/) const
10d100d4	177	{
	178	//
	179	// TOF PID using gaussian response
	180	//
f858b00e	181
10d100d4	182	if ((track->GetStatus()&AliESDtrack::kTOFout)==0) return;
10d100d4	183	if ((track->GetStatus()&AliESDtrack::kTIME)==0) return;
a512bf97	184	if ((track->GetStatus()&AliESDtrack::kITSin)==0) return;
10d100d4	185
f858b00e	186	Int_t ibin = fTOFResponse.GetMomBin(track->GetP());
	187	Float_t timezero = fTOFResponse.GetT0bin(ibin);
	188
10d100d4	189	Double_t time[AliPID::kSPECIESN];
	190	track->GetIntegratedTimes(time);
	191
	192	Double_t sigma[AliPID::kSPECIES];
	193	for (Int_t iPart = 0; iPart < AliPID::kSPECIES; iPart++) {
	194	sigma[iPart] = fTOFResponse.GetExpectedSigma(track->GetP(),time[iPart],AliPID::ParticleMass(iPart));
	195	}
	196
	197	AliDebugGeneral("AliESDpid::MakeTOFPID",2,
	198	Form("Expected TOF signals [ps]: %f %f %f %f %f",
	199	time[AliPID::kElectron],
	200	time[AliPID::kMuon],
	201	time[AliPID::kPion],
	202	time[AliPID::kKaon],
	203	time[AliPID::kProton]));
	204
	205	AliDebugGeneral("AliESDpid::MakeTOFPID",2,
	206	Form("Expected TOF std deviations [ps]: %f %f %f %f %f",
	207	sigma[AliPID::kElectron],
	208	sigma[AliPID::kMuon],
	209	sigma[AliPID::kPion],
	210	sigma[AliPID::kKaon],
	211	sigma[AliPID::kProton]
	212	));
	213
f858b00e	214	Double_t tof = track->GetTOFsignal() - timezero;
10d100d4	215
	216	Double_t p[AliPID::kSPECIES];
	217	Bool_t mismatch = kTRUE, heavy = kTRUE;
	218	for (Int_t j=0; j<AliPID::kSPECIES; j++) {
	219	Double_t sig = sigma[j];
f858b00e	220	if (TMath::Abs(tof-time[j]) > (fRange+2)*sig) {
f858b00e	221	p[j] = TMath::Exp(-0.5(fRange+2)(fRange+2))/sig;
10d100d4	222	} else
	223	p[j] = TMath::Exp(-0.5(tof-time[j])(tof-time[j])/(sig*sig))/sig;
	224
	225	// Check the mismatching
ee251349	226
10d100d4	227	Double_t mass = AliPID::ParticleMass(j);
	228	Double_t pm = fTOFResponse.GetMismatchProbability(track->GetP(),mass);
	229	if (p[j]>pm) mismatch = kFALSE;
	230
	231	// Check for particles heavier than (AliPID::kSPECIES - 1)
	232	if (tof < (time[j] + fRange*sig)) heavy=kFALSE;
	233
	234	}
	235
ee251349	236	/*
ee251349	237	if (mismatch)
77638021	238	for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]=1./AliPID::kSPECIES;
ee251349	239	*/
10d100d4	240
	241	track->SetTOFpid(p);
	242
ee251349	243	if (heavy) track->ResetStatus(AliESDtrack::kTOFpid);
f858b00e	244
ee251349	245	if (!CheckTOFMatching(track)) track->SetStatus(AliESDtrack::kTOFmismatch);
ee251349	246	else track->ResetStatus(AliESDtrack::kTOFmismatch);
10d100d4	247	}
10d100d4	248	//_________________________________________________________________________
b439f460	249	void AliESDpid::MakeTRDPID(AliESDtrack *track) const
	250	{
	251	//
	252	// Method to recalculate the TRD PID probabilities
	253	//
ea235c90	254	Double_t prob[AliPID::kSPECIES];
ea235c90	255	ComputeTRDProbability(track, AliPID::kSPECIES, prob);
b439f460	256	track->SetTRDpid(prob);
	257	}
	258	//_________________________________________________________________________
10d100d4	259	void AliESDpid::CombinePID(AliESDtrack *track) const
	260	{
	261	//
	262	// Combine the information of various detectors
	263	// to determine the Particle Identification
	264	//
	265	Int_t ns=AliPID::kSPECIES;
	266	Double_t p[10]={1.,1.,1.,1.,1.,1.,1.,1.,1.,1.};
	267
	268	if (track->IsOn(AliESDtrack::kITSpid)) {
	269	Double_t d[10];
	270	track->GetITSpid(d);
	271	for (Int_t j=0; j<ns; j++) p[j]*=d[j];
	272	}
	273
	274	if (track->IsOn(AliESDtrack::kTPCpid)) {
	275	Double_t d[10];
	276	track->GetTPCpid(d);
	277	for (Int_t j=0; j<ns; j++) p[j]*=d[j];
	278	}
	279
	280	if (track->IsOn(AliESDtrack::kTRDpid)) {
	281	Double_t d[10];
	282	track->GetTRDpid(d);
	283	for (Int_t j=0; j<ns; j++) p[j]*=d[j];
	284	}
	285
	286	if (track->IsOn(AliESDtrack::kTOFpid)) {
	287	Double_t d[10];
	288	track->GetTOFpid(d);
	289	for (Int_t j=0; j<ns; j++) p[j]*=d[j];
	290	}
	291
	292	if (track->IsOn(AliESDtrack::kHMPIDpid)) {
	293	Double_t d[10];
	294	track->GetHMPIDpid(d);
	295	for (Int_t j=0; j<ns; j++) p[j]*=d[j];
	296	}
	297
	298	track->SetESDpid(p);
8c6a71ab	299	}
f858b00e	300	//_________________________________________________________________________
f858b00e	301	Bool_t AliESDpid::CheckTOFMatching(AliESDtrack *track) const{
ea235c90	302	//
	303	// Check pid matching of TOF with TPC as reference
	304	//
f858b00e	305	Bool_t status = kFALSE;
	306
	307	Double_t exptimes[5];
	308	track->GetIntegratedTimes(exptimes);
	309
f858b00e	310	Float_t p = track->P();
f858b00e	311
7170298c	312	Float_t dedx = track->GetTPCsignal();
	313	Float_t time = track->GetTOFsignal() - fTOFResponse.GetStartTime(p);
	314
f858b00e	315	Double_t ptpc[3];
	316	track->GetInnerPxPyPz(ptpc);
	317	Float_t momtpc=TMath::Sqrt(ptpc[0]ptpc[0] + ptpc[1]ptpc[1] + ptpc[2]*ptpc[2]);
	318
	319	for(Int_t i=0;i < 5;i++){
	320	AliPID::EParticleType type=AliPID::EParticleType(i);
	321
	322	Float_t resolutionTOF = fTOFResponse.GetExpectedSigma(p, exptimes[i], AliPID::ParticleMass(i));
	323	if(TMath::Abs(exptimes[i] - time) < fRange * resolutionTOF){
	324	Float_t dedxExp = fTPCResponse.GetExpectedSignal(momtpc,type);
	325	Float_t resolutionTPC = fTPCResponse.GetExpectedSigma(momtpc,track->GetTPCsignalN(),type);
	326
7170298c	327	if(TMath::Abs(dedx - dedxExp) < fRangeTOFMismatch * resolutionTPC){
f858b00e	328	status = kTRUE;
	329	}
	330	}
	331	}
	332
	333	// for nuclei
c1252298	334	Float_t resolutionTOFpr = fTOFResponse.GetExpectedSigma(p, exptimes[4], AliPID::ParticleMass(4));
c1252298	335	if(!status && (exptimes[4] + fRange*resolutionTOFpr < time)) status = kTRUE;
f858b00e	336
	337
	338	return status;
	339	}