[u/mrichter/AliRoot.git] / HMPID / AliHMPIDReconstructor.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.                  *
 **************************************************************************/

#include "AliHMPIDReconstructor.h" //class header
#include "AliHMPID.h"              //Reconstruct() 
#include "AliHMPIDCluster.h"       //CluQA() 
#include "AliHMPIDParam.h"         //FillEsd() 
#include <AliESD.h>               //FillEsd()
#include <AliRunLoader.h>         //Reconstruct() for simulated digits
#include <AliRawReader.h>         //Reconstruct() for raw digits
#include <AliRun.h>               //Reconstruct()
ClassImp(AliHMPIDReconstructor)

//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
void AliHMPIDReconstructor::Dig2Clu(TObjArray *pDigAll,TObjArray *pCluAll,Bool_t isTryUnfold)
{
// Finds all clusters for a given digits list provided not empty. Currently digits list is a list of all digits for a single chamber.
// Puts all found clusters in separate lists, one per clusters. 
// Arguments: pDigAll     - list of digits for all chambers 
//            pCluAll     - list of clusters for all chambers
//            isTryUnfold - flag to choose between CoG and Mathieson fitting  
//  Returns: none    
  TMatrixF padMap(AliHMPIDDigit::kMaxPadChX,AliHMPIDDigit::kMaxPadChY);                       //pads map for single chamber 0..159 x 0..143 
  
  for(Int_t iCh=0;iCh<7;iCh++){                                                           //chambers loop 
    TClonesArray *pDigCur=(TClonesArray*)pDigAll->At(iCh);                                //get list of digits for current chamber
    if(pDigCur->GetEntriesFast()==0) continue;                                            //no digits for current chamber
  
    padMap=(Float_t)-1;                                                                   //reset map to -1 (means no digit for this pad)  
    TClonesArray *pCluCur=(TClonesArray*)pCluAll->At(iCh);                                //get list of clusters for current chamber
    
    for(Int_t iDig=0;iDig<pDigCur->GetEntriesFast();iDig++){                              //digits loop to fill pads map
      AliHMPIDDigit *pDig= (AliHMPIDDigit*)pDigCur->At(iDig);                             //get current digit
      padMap( pDig->PadChX(), pDig->PadChY() )=iDig;                                      //fill the map, (padx,pady) cell takes digit index
    }//digits loop to fill digits map 
    
    AliHMPIDCluster clu;                                                                  //tmp cluster to be used as current
  
    for(Int_t iDig=0;iDig<pDigCur->GetEntriesFast();iDig++){                              //digits loop for current chamber
      AliHMPIDDigit *pDig=(AliHMPIDDigit*)pDigCur->At(iDig);                              //take current digit
      if(!(pDig=UseDig(pDig->PadChX(),pDig->PadChY(),pDigCur,&padMap))) continue;         //this digit is already taken in FormClu(), go after next digit
      FormClu(&clu,pDig,pDigCur,&padMap);                                                 //form cluster starting from this digit by recursion
      
      clu.Solve(pCluCur,isTryUnfold);                                                     //solve this cluster and add all unfolded clusters to provided list  
      clu.Reset();                                                                        //empty current cluster
    }//digits loop for current chamber
  }//chambers loop
}//Dig2Clu()
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
void  AliHMPIDReconstructor::FormClu(AliHMPIDCluster *pClu,AliHMPIDDigit *pDig,TClonesArray *pDigLst,TMatrixF *pDigMap)
{
// Forms the initial cluster as a combination of all adjascent digits. Starts from the given digit
// then calls itself recursevly  for all possible neighbours.
// Arguments: pClu - pointer to cluster being formed
//  Returns: none   
  pClu->DigAdd(pDig);//take this digit in cluster

  Int_t cnt=0,cx[4],cy[4];
  
  if(pDig->PadPcX() != 0                       ){cx[cnt]=pDig->PadChX()-1; cy[cnt]=pDig->PadChY()  ;cnt++;}       //left
  if(pDig->PadPcX() != AliHMPIDDigit::kPadPcX-1){cx[cnt]=pDig->PadChX()+1; cy[cnt]=pDig->PadChY()  ;cnt++;}       //right
  if(pDig->PadPcY() != 0                       ){cx[cnt]=pDig->PadChX()  ; cy[cnt]=pDig->PadChY()-1;cnt++;}       //down
  if(pDig->PadPcY() != AliHMPIDDigit::kPadPcY-1){cx[cnt]=pDig->PadChX()  ; cy[cnt]=pDig->PadChY()+1;cnt++;}       //up
  
  for (Int_t i=0;i<cnt;i++)
    if((pDig=UseDig(cx[i],cy[i],pDigLst,pDigMap))) FormClu(pClu,pDig,pDigLst,pDigMap);   //check if this neighbour pad fired and mark it as taken  
  
}//FormClu()
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
void AliHMPIDReconstructor::Reconstruct(AliRunLoader *pAL)const
{
//Invoked  by AliReconstruction to convert digits to clusters i.e. reconstruct simulated data
//Arguments: pAL - ALICE run loader pointer
//  Returns: none    
  AliDebug(1,"Start.");
  AliLoader *pRL=pAL->GetDetectorLoader("HMPID");
  AliHMPID *pRich=(AliHMPID*)pAL->GetAliRun()->GetDetector("HMPID");//get pointers for HMPID and HMPID loader
  pRL->LoadDigits();   
  pRL->LoadRecPoints("recreate");
  
  for(Int_t iEvtN=0;iEvtN<pAL->GetNumberOfEvents();iEvtN++){//events loop
    pAL->GetEvent(iEvtN); AliDebug(1,Form("Processing event %i...",iEvtN)); //switch current directory to next event    
    pRL->TreeD()->GetEntry(0);  pRL->MakeTree("R");  pRich->MakeBranch("R");  //load digits to memory  and create branches for clusters              
    
    Dig2Clu(pRich->DigLst(),pRich->CluLst());//cluster finder 
      
    pRL->TreeR()->Fill();            //fill tree for current event
    pRL->WriteRecPoints("OVERWRITE");//write out clusters for current event
    pRich->DigReset(); pRich->CluReset();
  }//events loop  

  pRL->UnloadDigits(); 
  pRL->UnloadRecPoints();  
    
  AliDebug(1,"Stop.");      
}//Reconstruct(for simulated digits)
//__________________________________________________________________________________________________
void AliHMPIDReconstructor::Reconstruct(AliRunLoader *pAL,AliRawReader* pRR)const
{
//Invoked  by AliReconstruction to convert raw digits from DDL files to clusters
//Arguments: pAL - ALICE run loader pointer
//           pRR - ALICE raw reader pointer  
//  Returns: none    
  AliLoader *pRL=pAL->GetDetectorLoader("HMPID");  AliHMPID *pRich=(AliHMPID*)pAL->GetAliRun()->GetDetector("HMPID");//get pointers for HMPID and HMPID loader
  
  AliHMPIDDigit dig; //tmp digit, raw digit will be converted to it
  
  TObjArray digLst; Int_t iDigCnt[7]; for(Int_t i=0;i<7;i++){digLst.AddAt(new TClonesArray("AliHMPIDDigit"),i); iDigCnt[i]=0;} //tmp list of digits for all chambers
  
  Int_t iEvtN=0;
  while(pRR->NextEvent()){//events loop
    pAL->GetEvent(iEvtN++);
    pRL->MakeTree("R");  pRich->MakeBranch("R");
    
    for(Int_t iCh=0;iCh<7;iCh++){//chambers loop
      pRR->Select("HMPID",2*iCh,2*iCh+1);//select only DDL files for the current chamber      
      UInt_t w32=0;
      while(pRR->ReadNextInt(w32)){//raw records loop (in selected DDL files)
        UInt_t ddl=pRR->GetDDLID(); //returns 0,1,2 ... 13
        dig.Raw(w32,ddl);  
        AliDebug(1,Form("Ch=%i DDL=%i raw=0x%x digit=(%3i,%3i,%3i,%3i) Q=%5.2f",iCh,ddl,w32,dig.Ch(),dig.Pc(),dig.PadPcX(),dig.PadPcY(),dig.Q()));
        new((*((TClonesArray*)digLst.At(iCh)))[iDigCnt[iCh]++]) AliHMPIDDigit(dig); //add this digit to the tmp list
      }//raw records loop
      pRR->Reset();        
    }//chambers loop
    
    Dig2Clu(&digLst,pRich->CluLst());//cluster finder for all chambers
    for(Int_t i=0;i<7;i++){digLst.At(i)->Delete(); iDigCnt[i]=0;}                    //clean up list of digits for all chambers
    
    pRL->TreeR()->Fill();            //fill tree for current event
    pRL->WriteRecPoints("OVERWRITE");//write out clusters for current event
    pRich->CluReset();
  }//events loop  
  pRL->UnloadRecPoints();  
}//Reconstruct raw data
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

void AliHMPIDReconstructor::FillESD(AliRunLoader *, AliESD *pESD) const
{
// Calculates probability to be a electron-muon-pion-kaon-proton
// from the given Cerenkov angle and momentum assuming no initial particle composition
// (i.e. apriory probability to be the particle of the given sort is the same for all sorts)

  AliPID ppp; //needed
  Double_t pid[AliPID::kSPECIES],h[AliPID::kSPECIES];
   
  for(Int_t iTrk=0;iTrk<pESD->GetNumberOfTracks();iTrk++){//ESD tracks loop
    AliESDtrack *pTrk = pESD->GetTrack(iTrk);// get next reconstructed track
    if(pTrk->GetHMPIDsignal()<=0){//HMPID does not find anything reasonable for this track, assign 0.2 for all species
      for(Int_t iPart=0;iPart<AliPID::kSPECIES;iPart++) pid[iPart]=1.0/AliPID::kSPECIES;
      pTrk->SetHMPIDpid(pid);
      continue;
    } 
    Double_t pmod = pTrk->GetP();
    Double_t hTot=0;
    for(Int_t iPart=0;iPart<AliPID::kSPECIES;iPart++){
      Double_t mass = AliPID::ParticleMass(iPart);
      Double_t cosThetaTh = TMath::Sqrt(mass*mass+pmod*pmod)/(AliHMPIDParam::Instance()->MeanIdxRad()*pmod);
      if(cosThetaTh<1) //calculate the height of theortical theta ckov on the gaus of experimental one
        h[iPart] =TMath::Gaus(TMath::ACos(cosThetaTh),pTrk->GetHMPIDsignal(),TMath::Sqrt(pTrk->GetHMPIDchi2()),kTRUE);
      
      else             //beta < 1/ref. idx. => no light at all  
        h[iPart] =0 ;       
      hTot    +=h[iPart]; //total height of all theoretical heights for normalization
    }//species loop
     
    Double_t hMin=TMath::Gaus(pTrk->GetHMPIDsignal()-4*TMath::Sqrt(pTrk->GetHMPIDchi2()),pTrk->GetHMPIDsignal(),TMath::Sqrt(pTrk->GetHMPIDchi2()),kTRUE);//5 sigma protection
    
    for(Int_t iPart=0;iPart<AliPID::kSPECIES;iPart++)//species loop to assign probabilities
      if(hTot>hMin)  
        pid[iPart]=h[iPart]/hTot;
      else                               //all theoretical values are far away from experemental one
        pid[iPart]=1.0/AliPID::kSPECIES; 
    pTrk->SetHMPIDpid(pid);
  }//ESD tracks loop
  //last line is to check if the nearest thetacerenkov to the teorethical one is within 5 sigma, otherwise no response (equal prob to every particle
}//FillESD
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Commit	Line	Data
	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
	16	#include "AliHMPIDReconstructor.h" //class header
	17	#include "AliHMPID.h" //Reconstruct()
	18	#include "AliHMPIDCluster.h" //CluQA()
	19	#include "AliHMPIDParam.h" //FillEsd()
	20	#include <AliESD.h> //FillEsd()
	21	#include <AliRunLoader.h> //Reconstruct() for simulated digits
	22	#include <AliRawReader.h> //Reconstruct() for raw digits
	23	#include <AliRun.h> //Reconstruct()
	24	ClassImp(AliHMPIDReconstructor)
	25
	26	//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	27	void AliHMPIDReconstructor::Dig2Clu(TObjArray pDigAll,TObjArray pCluAll,Bool_t isTryUnfold)
	28	{
	29	// Finds all clusters for a given digits list provided not empty. Currently digits list is a list of all digits for a single chamber.
	30	// Puts all found clusters in separate lists, one per clusters.
	31	// Arguments: pDigAll - list of digits for all chambers
	32	// pCluAll - list of clusters for all chambers
	33	// isTryUnfold - flag to choose between CoG and Mathieson fitting
	34	// Returns: none
	35	TMatrixF padMap(AliHMPIDDigit::kMaxPadChX,AliHMPIDDigit::kMaxPadChY); //pads map for single chamber 0..159 x 0..143
	36
	37	for(Int_t iCh=0;iCh<7;iCh++){ //chambers loop
	38	TClonesArray pDigCur=(TClonesArray)pDigAll->At(iCh); //get list of digits for current chamber
	39	if(pDigCur->GetEntriesFast()==0) continue; //no digits for current chamber
	40
	41	padMap=(Float_t)-1; //reset map to -1 (means no digit for this pad)
	42	TClonesArray pCluCur=(TClonesArray)pCluAll->At(iCh); //get list of clusters for current chamber
	43
	44	for(Int_t iDig=0;iDig<pDigCur->GetEntriesFast();iDig++){ //digits loop to fill pads map
	45	AliHMPIDDigit pDig= (AliHMPIDDigit)pDigCur->At(iDig); //get current digit
	46	padMap( pDig->PadChX(), pDig->PadChY() )=iDig; //fill the map, (padx,pady) cell takes digit index
	47	}//digits loop to fill digits map
	48
	49	AliHMPIDCluster clu; //tmp cluster to be used as current
	50
	51	for(Int_t iDig=0;iDig<pDigCur->GetEntriesFast();iDig++){ //digits loop for current chamber
	52	AliHMPIDDigit pDig=(AliHMPIDDigit)pDigCur->At(iDig); //take current digit
	53	if(!(pDig=UseDig(pDig->PadChX(),pDig->PadChY(),pDigCur,&padMap))) continue; //this digit is already taken in FormClu(), go after next digit
	54	FormClu(&clu,pDig,pDigCur,&padMap); //form cluster starting from this digit by recursion
	55
	56	clu.Solve(pCluCur,isTryUnfold); //solve this cluster and add all unfolded clusters to provided list
	57	clu.Reset(); //empty current cluster
	58	}//digits loop for current chamber
	59	}//chambers loop
	60	}//Dig2Clu()
	61	//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	62	void AliHMPIDReconstructor::FormClu(AliHMPIDCluster pClu,AliHMPIDDigit pDig,TClonesArray pDigLst,TMatrixF pDigMap)
	63	{
	64	// Forms the initial cluster as a combination of all adjascent digits. Starts from the given digit
	65	// then calls itself recursevly for all possible neighbours.
	66	// Arguments: pClu - pointer to cluster being formed
	67	// Returns: none
	68	pClu->DigAdd(pDig);//take this digit in cluster
	69
	70	Int_t cnt=0,cx[4],cy[4];
	71
	72	if(pDig->PadPcX() != 0 ){cx[cnt]=pDig->PadChX()-1; cy[cnt]=pDig->PadChY() ;cnt++;} //left
	73	if(pDig->PadPcX() != AliHMPIDDigit::kPadPcX-1){cx[cnt]=pDig->PadChX()+1; cy[cnt]=pDig->PadChY() ;cnt++;} //right
	74	if(pDig->PadPcY() != 0 ){cx[cnt]=pDig->PadChX() ; cy[cnt]=pDig->PadChY()-1;cnt++;} //down
	75	if(pDig->PadPcY() != AliHMPIDDigit::kPadPcY-1){cx[cnt]=pDig->PadChX() ; cy[cnt]=pDig->PadChY()+1;cnt++;} //up
	76
	77	for (Int_t i=0;i<cnt;i++)
	78	if((pDig=UseDig(cx[i],cy[i],pDigLst,pDigMap))) FormClu(pClu,pDig,pDigLst,pDigMap); //check if this neighbour pad fired and mark it as taken
	79
	80	}//FormClu()
	81	//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	82	void AliHMPIDReconstructor::Reconstruct(AliRunLoader *pAL)const
	83	{
	84	//Invoked by AliReconstruction to convert digits to clusters i.e. reconstruct simulated data
	85	//Arguments: pAL - ALICE run loader pointer
	86	// Returns: none
	87	AliDebug(1,"Start.");
	88	AliLoader *pRL=pAL->GetDetectorLoader("HMPID");
	89	AliHMPID pRich=(AliHMPID)pAL->GetAliRun()->GetDetector("HMPID");//get pointers for HMPID and HMPID loader
	90	pRL->LoadDigits();
	91	pRL->LoadRecPoints("recreate");
	92
	93	for(Int_t iEvtN=0;iEvtN<pAL->GetNumberOfEvents();iEvtN++){//events loop
	94	pAL->GetEvent(iEvtN); AliDebug(1,Form("Processing event %i...",iEvtN)); //switch current directory to next event
	95	pRL->TreeD()->GetEntry(0); pRL->MakeTree("R"); pRich->MakeBranch("R"); //load digits to memory and create branches for clusters
	96
	97	Dig2Clu(pRich->DigLst(),pRich->CluLst());//cluster finder
	98
	99	pRL->TreeR()->Fill(); //fill tree for current event
	100	pRL->WriteRecPoints("OVERWRITE");//write out clusters for current event
	101	pRich->DigReset(); pRich->CluReset();
	102	}//events loop
	103
	104	pRL->UnloadDigits();
	105	pRL->UnloadRecPoints();
	106
	107	AliDebug(1,"Stop.");
	108	}//Reconstruct(for simulated digits)
	109	//__________________________________________________________________________________________________
	110	void AliHMPIDReconstructor::Reconstruct(AliRunLoader pAL,AliRawReader pRR)const
	111	{
	112	//Invoked by AliReconstruction to convert raw digits from DDL files to clusters
	113	//Arguments: pAL - ALICE run loader pointer
	114	// pRR - ALICE raw reader pointer
	115	// Returns: none
	116	AliLoader pRL=pAL->GetDetectorLoader("HMPID"); AliHMPID pRich=(AliHMPID*)pAL->GetAliRun()->GetDetector("HMPID");//get pointers for HMPID and HMPID loader
	117
	118	AliHMPIDDigit dig; //tmp digit, raw digit will be converted to it
	119
	120	TObjArray digLst; Int_t iDigCnt[7]; for(Int_t i=0;i<7;i++){digLst.AddAt(new TClonesArray("AliHMPIDDigit"),i); iDigCnt[i]=0;} //tmp list of digits for all chambers
	121
	122	Int_t iEvtN=0;
	123	while(pRR->NextEvent()){//events loop
	124	pAL->GetEvent(iEvtN++);
	125	pRL->MakeTree("R"); pRich->MakeBranch("R");
	126
	127	for(Int_t iCh=0;iCh<7;iCh++){//chambers loop
	128	pRR->Select("HMPID",2iCh,2iCh+1);//select only DDL files for the current chamber
	129	UInt_t w32=0;
	130	while(pRR->ReadNextInt(w32)){//raw records loop (in selected DDL files)
	131	UInt_t ddl=pRR->GetDDLID(); //returns 0,1,2 ... 13
	132	dig.Raw(w32,ddl);
	133	AliDebug(1,Form("Ch=%i DDL=%i raw=0x%x digit=(%3i,%3i,%3i,%3i) Q=%5.2f",iCh,ddl,w32,dig.Ch(),dig.Pc(),dig.PadPcX(),dig.PadPcY(),dig.Q()));
	134	new((((TClonesArray)digLst.At(iCh)))[iDigCnt[iCh]++]) AliHMPIDDigit(dig); //add this digit to the tmp list
	135	}//raw records loop
	136	pRR->Reset();
	137	}//chambers loop
	138
	139	Dig2Clu(&digLst,pRich->CluLst());//cluster finder for all chambers
	140	for(Int_t i=0;i<7;i++){digLst.At(i)->Delete(); iDigCnt[i]=0;} //clean up list of digits for all chambers
	141
	142	pRL->TreeR()->Fill(); //fill tree for current event
	143	pRL->WriteRecPoints("OVERWRITE");//write out clusters for current event
	144	pRich->CluReset();
	145	}//events loop
	146	pRL->UnloadRecPoints();
	147	}//Reconstruct raw data
	148	//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	149
	150	void AliHMPIDReconstructor::FillESD(AliRunLoader , AliESD pESD) const
	151	{
	152	// Calculates probability to be a electron-muon-pion-kaon-proton
	153	// from the given Cerenkov angle and momentum assuming no initial particle composition
	154	// (i.e. apriory probability to be the particle of the given sort is the same for all sorts)
	155
	156	AliPID ppp; //needed
	157	Double_t pid[AliPID::kSPECIES],h[AliPID::kSPECIES];
	158
	159	for(Int_t iTrk=0;iTrk<pESD->GetNumberOfTracks();iTrk++){//ESD tracks loop
	160	AliESDtrack *pTrk = pESD->GetTrack(iTrk);// get next reconstructed track
	161	if(pTrk->GetHMPIDsignal()<=0){//HMPID does not find anything reasonable for this track, assign 0.2 for all species
	162	for(Int_t iPart=0;iPart<AliPID::kSPECIES;iPart++) pid[iPart]=1.0/AliPID::kSPECIES;
	163	pTrk->SetHMPIDpid(pid);
	164	continue;
	165	}
	166	Double_t pmod = pTrk->GetP();
	167	Double_t hTot=0;
	168	for(Int_t iPart=0;iPart<AliPID::kSPECIES;iPart++){
	169	Double_t mass = AliPID::ParticleMass(iPart);
	170	Double_t cosThetaTh = TMath::Sqrt(massmass+pmodpmod)/(AliHMPIDParam::Instance()->MeanIdxRad()*pmod);
	171	if(cosThetaTh<1) //calculate the height of theortical theta ckov on the gaus of experimental one
	172	h[iPart] =TMath::Gaus(TMath::ACos(cosThetaTh),pTrk->GetHMPIDsignal(),TMath::Sqrt(pTrk->GetHMPIDchi2()),kTRUE);
	173
	174	else //beta < 1/ref. idx. => no light at all
	175	h[iPart] =0 ;
	176	hTot +=h[iPart]; //total height of all theoretical heights for normalization
	177	}//species loop
	178
	179	Double_t hMin=TMath::Gaus(pTrk->GetHMPIDsignal()-4*TMath::Sqrt(pTrk->GetHMPIDchi2()),pTrk->GetHMPIDsignal(),TMath::Sqrt(pTrk->GetHMPIDchi2()),kTRUE);//5 sigma protection
	180
	181	for(Int_t iPart=0;iPart<AliPID::kSPECIES;iPart++)//species loop to assign probabilities
	182	if(hTot>hMin)
	183	pid[iPart]=h[iPart]/hTot;
	184	else //all theoretical values are far away from experemental one
	185	pid[iPart]=1.0/AliPID::kSPECIES;
	186	pTrk->SetHMPIDpid(pid);
	187	}//ESD tracks loop
	188	//last line is to check if the nearest thetacerenkov to the teorethical one is within 5 sigma, otherwise no response (equal prob to every particle
	189	}//FillESD
	190	//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++