[u/mrichter/AliRoot.git] / PWG4 / AliGammaMCDataReader.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.                  *
 **************************************************************************/
/* $Id$ */

/* History of cvs commits:
 *
 * $Log$
 * Revision 1.2  2007/08/17 12:40:04  schutz
 * New analysis classes by Gustavo Conesa
 *
 * Revision 1.1.2.1  2007/07/26 10:32:09  schutz
 * new analysis classes in the the new analysis framework
 *
 *
 */

//_________________________________________________________________________
// Class for reading data (Kinematics and ESDs) in order to do prompt gamma correlations
//  Class created from old AliPHOSGammaJet 
//  (see AliRoot versions previous Release 4-09)
//
//*-- Author: Gustavo Conesa (LNF-INFN) 
//////////////////////////////////////////////////////////////////////////////


// --- ROOT system ---
#include <TFormula.h>
#include <TParticle.h>
 
//---- ANALYSIS system ----
#include "AliGammaMCDataReader.h" 
#include "AliESDEvent.h"
#include "AliESDVertex.h"
#include "AliESDCaloCluster.h"
#include "AliStack.h"
#include "AliLog.h"

ClassImp(AliGammaMCDataReader)

//____________________________________________________________________________
  AliGammaMCDataReader::AliGammaMCDataReader() : 
    AliGammaReader()
{
  //Default Ctor
  
  //Initialize parameters
  fDataType=kMCData;
  
}

//____________________________________________________________________________
AliGammaMCDataReader::AliGammaMCDataReader(const AliGammaMCDataReader & g) :   
  AliGammaReader(g)
{
  // cpy ctor
}

//_________________________________________________________________________
AliGammaMCDataReader & AliGammaMCDataReader::operator = (const AliGammaMCDataReader & source)
{
  // assignment operator
  
  if(&source == this) return *this;
  

  return *this;
  
}

//____________________________________________________________________________
void AliGammaMCDataReader::CreateParticleList(TObject * data, TObject * kine,
					      TClonesArray * plCTS, 
					      TClonesArray * plEMCAL,  
					      TClonesArray * plPHOS,   
					      TClonesArray * plPrimCTS, 
					      TClonesArray * plPrimEMCAL, 
					      TClonesArray * plPrimPHOS){
  
  //Create a list of particles from the ESD. These particles have been measured 
  //by the Central Tracking system (TPC+ITS+...), PHOS and EMCAL 
  //Also create particle list with mothers.

  AliESDEvent* esd = (AliESDEvent*) data;
  AliStack* stack = (AliStack*) kine;
  
  Int_t npar  = 0 ;
  Double_t *pid = new Double_t[AliPID::kSPECIESN];  
  AliDebug(3,"Fill particle lists");
  
  //Get vertex for momentum calculation  
  Double_t v[3] ; //vertex ;
  esd->GetVertex()->GetXYZ(v) ; 
  
  //########### CALORIMETERS ##############  
  Int_t nCaloCluster = esd->GetNumberOfCaloClusters() ;  
  Int_t indexPH = plPHOS->GetEntries() ;
  Int_t indexEM = plEMCAL->GetEntries() ;
  
  for (npar =  0; npar <  nCaloCluster; npar++) {//////////////CaloCluster loop
    AliESDCaloCluster * clus = esd->GetCaloCluster(npar) ; // retrieve cluster from esd
    Int_t type = clus->GetClusterType();
    
    //########### PHOS ##############
    if(fSwitchOnPHOS && type ==  AliESDCaloCluster::kPHOSCluster){
      AliDebug(4,Form("PHOS clusters: E %f, match %d", clus->E(),clus->GetTrackMatched()));
      
      if(clus->GetTrackMatched()==-1){
	TLorentzVector momentum ;
	clus->GetMomentum(momentum, v);      
	Double_t phi = momentum.Phi();
	if(phi<0) phi+=TMath::TwoPi() ;
	if(momentum.Pt() > fNeutralPtCut &&  TMath::Abs(momentum.Eta()) < fPHOSEtaCut &&
	   phi > fPhiPHOSCut[0] && phi < fPhiPHOSCut[1] ) {
	  
	  pid=clus->GetPid();	
	  Int_t pdg = 22;
	  
	  if(IsPHOSPIDOn()){
	    AliDebug(5,Form("E %1.2f; PID: ph %0.2f, pi0 %0.2f, el %0.2f, conv el %0.2f,pi %0.2f, k %0.2f, p %0.2f, k0 %0.2f, n %0.2f, mu %0.2f ",
			    momentum.E(),pid[AliPID::kPhoton],pid[AliPID::kPi0],pid[AliPID::kElectron],pid[AliPID::kEleCon],pid[AliPID::kPion],
			    pid[AliPID::kKaon],pid[AliPID::kProton], pid[AliPID::kKaon0],pid[AliPID::kNeutron], pid[AliPID::kMuon]));
	    
	    Float_t wPhoton =  fPHOSPhotonWeight;
	    Float_t wPi0 =  fPHOSPi0Weight;
	    
	    if(fPHOSWeightFormula){
	      wPhoton = fPHOSPhotonWeightFormula->Eval(momentum.E()) ;
	      wPi0 =    fPHOSPi0WeightFormula->Eval(momentum.E());
	    }
	    
	    if(pid[AliPID::kPhoton] > wPhoton) 
	      pdg = kPhoton ;
	    else if(pid[AliPID::kPi0] > wPi0) 
	      pdg = kPi0 ; 
	    else if(pid[AliPID::kElectron] > fPHOSElectronWeight)  
	      pdg = kElectron ;
	    else if(pid[AliPID::kEleCon] > fPHOSElectronWeight) 
	      pdg = kEleCon ;
	    else if(pid[AliPID::kPion]+pid[AliPID::kKaon]+pid[AliPID::kProton] > fPHOSChargeWeight) 
	      pdg = kChargedHadron ;  
	    else if(pid[AliPID::kKaon0]+pid[AliPID::kNeutron] > fPHOSNeutralWeight) 
	      pdg = kNeutralHadron ; 
	    
	    else if(pid[AliPID::kElectron]+pid[AliPID::kEleCon]+pid[AliPID::kPion]+pid[AliPID::kKaon]+pid[AliPID::kProton]  >  
		    pid[AliPID::kPhoton] + pid[AliPID::kPi0]+pid[AliPID::kKaon0]+pid[AliPID::kNeutron]) 
	      pdg = kChargedUnknown  ; 
	    else 
	      pdg = kNeutralUnknown ; 
	    //neutral cluster, unidentifed.
	  }
	  
	  if(pdg != kElectron && pdg != kEleCon && pdg !=kChargedHadron && pdg !=kChargedUnknown ){//keep only neutral particles in the array
	    
	    //###############
	    //Check kinematics
	    //###############
	    Int_t label = clus->GetLabel();
	    TParticle * pmother = GetMotherParticle(label,stack, "PHOS",momentum);
	    
	    TParticle * particle = new TParticle(pdg, 1, -1, -1, -1, -1, 
						 momentum.Px(), momentum.Py(), momentum.Pz(), momentum.E(), v[0], v[1], v[2], 0);
	    
	    AliDebug(4,Form("PHOS added: pdg %d, pt %f, phi %f, eta %f", pdg, particle->Pt(),particle->Phi(),particle->Eta()));
	    new((*plPHOS)[indexPH])   TParticle(*particle) ;
	    new((*plPrimPHOS)[indexPH])   TParticle(*pmother) ;
	    indexPH++;
	    
	  }
	  else AliDebug(4,Form("PHOS charged cluster NOT added: pdg %d, pt %f, phi %f, eta %f\n", 
			       pdg, momentum.Pt(),momentum.Phi(),momentum.Eta()));	
	  
	}//pt, eta, phi cut
	else 	AliDebug(4,"Particle not added");
      }//track-match?
    }//PHOS cluster

    //################ EMCAL ##############
    else if(fSwitchOnEMCAL &&  type ==  AliESDCaloCluster::kEMCALClusterv1){
      AliDebug(4,Form("EMCAL clusters: E %f, match %d", clus->E(),clus->GetTrackMatched()));
      
      if(clus->GetTrackMatched()==-1 ){
	TLorentzVector momentum ;
	clus->GetMomentum(momentum, v); 
	Double_t phi = momentum.Phi();
	if(phi<0) phi+=TMath::TwoPi() ;
	if(momentum.Pt() > fNeutralPtCut &&  TMath::Abs(momentum.Eta()) < fEMCALEtaCut &&
	   phi > fPhiEMCALCut[0] && phi < fPhiEMCALCut[1] ) {
	  
	  pid=clus->GetPid();	
	  Int_t pdg = 22;
	  
	  if(IsEMCALPIDOn()){
	    AliDebug(5,Form("E %1.2f; PID: ph %0.2f, pi0 %0.2f, el %0.2f, conv el %0.2f,pi %0.2f, k %0.2f, p %0.2f, k0 %0.2f, n %0.2f, mu %0.2f ",
			    momentum.E(),pid[AliPID::kPhoton],pid[AliPID::kPi0],pid[AliPID::kElectron],pid[AliPID::kEleCon],pid[AliPID::kPion],
			    pid[AliPID::kKaon],pid[AliPID::kProton], pid[AliPID::kKaon0],pid[AliPID::kNeutron], pid[AliPID::kMuon]));
	    
	    if(pid[AliPID::kPhoton] > fEMCALPhotonWeight) 
	      pdg = kPhoton ;
	    else if(pid[AliPID::kPi0] > fEMCALPi0Weight) 
	      pdg = kPi0 ; 
	    else if(pid[AliPID::kElectron] > fEMCALElectronWeight)  
	      pdg = kElectron ;
	    else if(pid[AliPID::kEleCon] > fEMCALElectronWeight) 
	      pdg = kEleCon ;
	    else if(pid[AliPID::kPion]+pid[AliPID::kKaon]+pid[AliPID::kProton] > fEMCALChargeWeight) 
	      pdg = kChargedHadron ;  
	    else if(pid[AliPID::kKaon0]+pid[AliPID::kNeutron] > fEMCALNeutralWeight) 
	      pdg = kNeutralHadron ; 
	    else if(pid[AliPID::kElectron]+pid[AliPID::kEleCon]+pid[AliPID::kPion]+pid[AliPID::kKaon]+pid[AliPID::kProton]  >  
		    pid[AliPID::kPhoton] + pid[AliPID::kPi0]+pid[AliPID::kKaon0]+pid[AliPID::kNeutron]) 
	      pdg = kChargedUnknown ; 
	    else 
	      pdg = kNeutralUnknown ;
	  }
	  
	  if(pdg != kElectron && pdg != kEleCon && pdg !=kChargedHadron && pdg !=kChargedUnknown){//keep only neutral particles in the array
	    
	    //###############
	    //Check kinematics
	    //###############
	    Int_t label = clus->GetLabel();
	    TParticle * pmother = GetMotherParticle(label,stack, "EMCAL",momentum);
	    
	    TParticle * particle = new TParticle(pdg, 1, -1, -1, -1, -1, 
						 momentum.Px(), momentum.Py(), momentum.Pz(), momentum.E(), v[0], v[1], v[2], 0);
	    AliDebug(4,Form("EMCAL cluster added: pdg %f, pt %f, phi %f, eta %f", pdg, particle->Pt(),particle->Phi(),particle->Eta()));
	    
	    new((*plEMCAL)[indexEM])   TParticle(*particle) ;
	    new((*plPrimEMCAL)[indexEM])   TParticle(*pmother) ;
	    indexEM++;
	  }
	  else AliDebug(4,Form("EMCAL charged cluster NOT added: pdg %d, pt %f, phi %f, eta %f", 
			       pdg, momentum.Pt(),momentum.Phi(),momentum.Eta()));
	  
	}//pt, phi, eta cut
	else 	AliDebug(4,"Particle not added");
      }//track-matched
    }//EMCAL cluster

  }//cluster loop

 
  //########### CTS (TPC+ITS) #####################
  Int_t nTracks   = esd->GetNumberOfTracks() ;
  Int_t indexCh  = plCTS->GetEntries() ;

  if(fSwitchOnCTS){
    AliDebug(3,Form("Number of tracks %d",nTracks));
  
    for (npar =  0; npar <  nTracks; npar++) {////////////// track loop
      AliESDtrack * track = esd->GetTrack(npar) ; // retrieve track from esd
      
      //We want tracks fitted in the detectors:
      ULong_t status=AliESDtrack::kTPCrefit;
      status|=AliESDtrack::kITSrefit;
    
      //We want tracks whose PID bit is set:
      //     ULong_t status =AliESDtrack::kITSpid;
      //     status|=AliESDtrack::kTPCpid;
      
      if ( (track->GetStatus() & status) == status) {//Check if the bits we want are set
	// Do something with the tracks which were successfully
	// re-fitted 
	Double_t en = 0; //track ->GetTPCsignal() ;
	Double_t mom[3];
	track->GetPxPyPz(mom) ;
	Double_t px = mom[0];
	Double_t py = mom[1];
	Double_t pz = mom[2]; //Check with TPC people if this is correct.
	Int_t pdg = 11; //Give any charged PDG code, in this case electron.
	//I just want to tag the particle as charged
	
	//Check kinematics
	Int_t label = TMath::Abs(track->GetLabel());
	TParticle * pmother = new TParticle();
	pmother = stack->Particle(label);
	
	TParticle * particle = new TParticle(pdg, 1, -1, -1, -1, -1, 
					     px, py, pz, en, v[0], v[1], v[2], 0);
	
	if(particle->Pt() > fChargedPtCut && TMath::Abs(particle->Eta())<fCTSEtaCut){
	  new((*plCTS)[indexCh])       TParticle(*particle) ;   
	  new((*plPrimCTS)[indexCh])       TParticle(*pmother) ;
	  indexCh++;    
	  
	}//kinematic selection
      }//select track from refit
    }//track loop    
  }//CTS

  AliDebug(3,Form("Particle lists filled, tracks  %d , clusters: EMCAL %d, PHOS %d", indexCh,indexEM,indexPH));

}

TParticle * AliGammaMCDataReader:: GetMotherParticle(Int_t label, AliStack *stack, TString calo,  TLorentzVector momentum)
{
  //Gets the primary particle and do some checks:
  //Check if primary is inside calorimeter and look the mother outsie
  //Check if mother is a decay photon, in which case check if decay was overlapped
  
  Float_t minangle = 0;
  Float_t ipdist = 0;
  TParticle * pmother = new TParticle();

  if(calo == "PHOS"){
    ipdist= fPHOSIPDistance;
    minangle = fPHOSMinAngle; 
  }
  else if (calo == "EMCAL"){
    ipdist = fEMCALIPDistance;
    minangle = fEMCALMinAngle;
  }


  if(label>=0){
    pmother = stack->Particle(label);
    Int_t mostatus = pmother->GetStatusCode();
    Int_t mopdg    = TMath::Abs(pmother->GetPdgCode());
    
    //Check if mother is a conversion inside the calorimeter
    //In such case, return the mother before the calorimeter.
    //First approximation.
    Float_t vy = TMath::Abs(pmother->Vy()) ;

    if( mostatus == 0 && vy >= ipdist){

      //cout<<"Calo: "<<calo<<" vy "<<vy<<" E clus "<<momentum.E()<<" Emother "<<pmother->Energy()<<" "
      //  <<pmother->GetName()<<endl;

      while( vy >= ipdist){//inside calorimeter
	AliDebug(4,Form("Conversion inside calorimeter, mother vertex %0.2f, IP distance %0.2f", vy, ipdist));
	pmother =  stack->Particle(pmother->GetMother(0));
	vy = TMath::Abs(pmother->Vy()) ;
	//cout<<" label "<<label<<" Mother: "<<pmother->GetName()<<" E "<<pmother->Energy()<<" Status "<<pmother->GetStatusCode()<<"  and vertex "<<vy<<endl;
	mostatus = pmother->GetStatusCode();
	mopdg    = TMath::Abs(pmother->GetPdgCode());
      }//while vertex is inside calorimeter
      //cout<<"Calo: "<<calo<<" final vy "<<vy<<" E clus "<<momentum.E()<<" Emother "<<pmother->Energy()<<" "
      //  <<pmother->GetName()<<endl;
    }//check status and vertex

    AliDebug(4,Form("%s, ESD E %2.2f, PID %d,  mother: E %2.2f, label %d, status %d,  vertex %3.2f, mother 2 %d, grandmother %d \n",
		    calo.Data(),momentum.E(),pmother->Energy(), label, pmother->GetPdgCode(),
		    pmother->GetStatusCode(), vy, pmother->GetMother(0), stack->GetPrimary(label)));
    
    //Check Decay photons
    if(mopdg == 22){
      
      //his mother was a pi0?
      TParticle * pmotherpi0 =  stack->Particle(pmother->GetMother(0));
      if( pmotherpi0->GetPdgCode() == 111){

	AliDebug(4,Form(" %s: E cluster %2.2f, E gamma %2.2f, Mother Pi0, E %0.2f, status %d, daughters %d\n",
			calo.Data(), momentum.E(),pmother->Energy(),pmotherpi0->Energy(), 
			pmotherpi0->GetStatusCode(), pmotherpi0->GetNDaughters()));
	
	if(pmotherpi0->GetNDaughters() == 1) mostatus = 2 ; //signal that this photon can only be decay, not overlapped.
	else if(pmotherpi0->GetNDaughters() == 2){
	  
	  TParticle * pd1 = stack->Particle(pmotherpi0->GetDaughter(0));
	  TParticle * pd2 = stack->Particle(pmotherpi0->GetDaughter(1));
	  //if(pmotherpi0->Energy()> 10 ){
// 	  cout<<"Two "<<calo<<" daugthers, pi0 label "<<pmother->GetMother(0)<<" E :"<<pmotherpi0->Energy()<<endl;
// 	  cout<<" 1) label "<<pmotherpi0->GetDaughter(0)<<" pdg "<<pd1->GetPdgCode()<<" E  "<<pd1->Energy()
// 	      <<" phi "<<pd1->Phi()*TMath::RadToDeg()<<" eta "<<pd1->Eta()
// 	      <<" mother label "<<pd1->GetMother(0)<<" n daug "<<pd1->GetNDaughters() <<endl;
// 	    cout<<" 2) label "<<pmotherpi0->GetDaughter(1)<<" pdg "<<pd2->GetPdgCode()<<" E  "<<pd2->Energy()
// 		<<" phi "<<pd2->Phi()*TMath::RadToDeg()<<" eta "<<pd2->Eta()<<" mother label "
// 		<<pd2->GetMother(0)<<" n daug "<<pd2->GetNDaughters() <<endl;
	    //}
	  if(pd1->GetPdgCode() == 22 && pd2->GetPdgCode() == 22){
	    TLorentzVector lv1 , lv2 ;
	    pd1->Momentum(lv1);
	    pd2->Momentum(lv2);
	    Double_t angle = lv1.Angle(lv2.Vect());
// 	    if(pmotherpi0->Energy()> 10 )
// 	      cout<<"angle*ipdist "<<angle*ipdist<<" mindist "<< minangle <<endl;
	    if (angle < minangle){
	      //There is overlapping, pass the pi0 as mother
	      
	      AliDebug(4,Form(">>>> %s cluster with E %2.2f is a overlapped pi0, E %2.2f, angle %2.4f < anglemin %2.4f\n",
			      calo.Data(), momentum.E(), pmotherpi0->Energy(), angle, minangle));	    
	     
	      pmother = pmotherpi0 ;
	      
	    }
	    else mostatus = 2 ; // gamma decay not overlapped
	  }// daughters are photons
	  else mostatus = 2; // daughters are e-gamma or e-e, no overlapped, or charged cluster
	}//2 daughters
	else AliDebug(4,Form("pi0 has %d daughters",pmotherpi0->GetNDaughters()));
      }//pi0 decay photon?
    }//photon 

    pmother->SetStatusCode(mostatus); // if status = 2, decay photon.

  }//label >=0
  else AliInfo(Form("Negative Kinematic label of PHOS cluster:  %d",label));

  return pmother ;

}
Commit	Line	Data
bdcfac30	1
	2	/**************************************************************************
	3	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	4	* *
	5	* Author: The ALICE Off-line Project. *
	6	* Contributors are mentioned in the code where appropriate. *
	7	* *
	8	* Permission to use, copy, modify and distribute this software and its *
	9	* documentation strictly for non-commercial purposes is hereby granted *
	10	* without fee, provided that the above copyright notice appears in all *
	11	* copies and that both the copyright notice and this permission notice *
	12	* appear in the supporting documentation. The authors make no claims *
	13	* about the suitability of this software for any purpose. It is *
	14	* provided "as is" without express or implied warranty. *
	15	**************************************************************************/
	16	/* $Id$ */
	17
	18	/* History of cvs commits:
	19	*
	20	* $Log$
4b707925	21	* Revision 1.2 2007/08/17 12:40:04 schutz
	22	* New analysis classes by Gustavo Conesa
	23	*
bdcfac30	24	* Revision 1.1.2.1 2007/07/26 10:32:09 schutz
	25	* new analysis classes in the the new analysis framework
	26	*
	27	*
	28	*/
	29
	30	//_________________________________________________________________________
	31	// Class for reading data (Kinematics and ESDs) in order to do prompt gamma correlations
	32	// Class created from old AliPHOSGammaJet
	33	// (see AliRoot versions previous Release 4-09)
	34	//
	35	//*-- Author: Gustavo Conesa (LNF-INFN)
	36	//////////////////////////////////////////////////////////////////////////////
	37
	38
	39	// --- ROOT system ---
3bb2c538	40	#include <TFormula.h>
bdcfac30	41	#include <TParticle.h>
3bb2c538	42
bdcfac30	43	//---- ANALYSIS system ----
bdcfac30	44	#include "AliGammaMCDataReader.h"
bdcfac30	45	#include "AliESDEvent.h"
	46	#include "AliESDVertex.h"
	47	#include "AliESDCaloCluster.h"
	48	#include "AliStack.h"
3bb2c538	49	#include "AliLog.h"
bdcfac30	50
	51	ClassImp(AliGammaMCDataReader)
	52
	53	//____________________________________________________________________________
	54	AliGammaMCDataReader::AliGammaMCDataReader() :
4b707925	55	AliGammaReader()
bdcfac30	56	{
	57	//Default Ctor
	58
	59	//Initialize parameters
	60	fDataType=kMCData;
bdcfac30	61
	62	}
	63
	64	//____________________________________________________________________________
	65	AliGammaMCDataReader::AliGammaMCDataReader(const AliGammaMCDataReader & g) :
4b707925	66	AliGammaReader(g)
bdcfac30	67	{
	68	// cpy ctor
	69	}
	70
	71	//_________________________________________________________________________
	72	AliGammaMCDataReader & AliGammaMCDataReader::operator = (const AliGammaMCDataReader & source)
	73	{
	74	// assignment operator
	75
	76	if(&source == this) return *this;
	77
4b707925	78
bdcfac30	79	return *this;
	80
	81	}
	82
	83	//____________________________________________________________________________
	84	void AliGammaMCDataReader::CreateParticleList(TObject * data, TObject * kine,
	85	TClonesArray * plCTS,
	86	TClonesArray * plEMCAL,
4b707925	87	TClonesArray * plPHOS,
	88	TClonesArray * plPrimCTS,
	89	TClonesArray * plPrimEMCAL,
	90	TClonesArray * plPrimPHOS){
bdcfac30	91
bdcfac30	92	//Create a list of particles from the ESD. These particles have been measured
3bb2c538	93	//by the Central Tracking system (TPC+ITS+...), PHOS and EMCAL
3bb2c538	94	//Also create particle list with mothers.
bdcfac30	95
	96	AliESDEvent* esd = (AliESDEvent*) data;
	97	AliStack* stack = (AliStack*) kine;
	98
	99	Int_t npar = 0 ;
4b707925	100	Double_t *pid = new Double_t[AliPID::kSPECIESN];
bdcfac30	101	AliDebug(3,"Fill particle lists");
	102
	103	//Get vertex for momentum calculation
	104	Double_t v[3] ; //vertex ;
	105	esd->GetVertex()->GetXYZ(v) ;
	106
3bb2c538	107	//########### CALORIMETERS ##############
3bb2c538	108	Int_t nCaloCluster = esd->GetNumberOfCaloClusters() ;
bdcfac30	109	Int_t indexPH = plPHOS->GetEntries() ;
3bb2c538	110	Int_t indexEM = plEMCAL->GetEntries() ;
bdcfac30	111
3bb2c538	112	for (npar = 0; npar < nCaloCluster; npar++) {//////////////CaloCluster loop
	113	AliESDCaloCluster * clus = esd->GetCaloCluster(npar) ; // retrieve cluster from esd
	114	Int_t type = clus->GetClusterType();
	115
	116	//########### PHOS ##############
	117	if(fSwitchOnPHOS && type == AliESDCaloCluster::kPHOSCluster){
	118	AliDebug(4,Form("PHOS clusters: E %f, match %d", clus->E(),clus->GetTrackMatched()));
	119
	120	if(clus->GetTrackMatched()==-1){
	121	TLorentzVector momentum ;
	122	clus->GetMomentum(momentum, v);
	123	Double_t phi = momentum.Phi();
	124	if(phi<0) phi+=TMath::TwoPi() ;
	125	if(momentum.Pt() > fNeutralPtCut && TMath::Abs(momentum.Eta()) < fPHOSEtaCut &&
	126	phi > fPhiPHOSCut[0] && phi < fPhiPHOSCut[1] ) {
4b707925	127
3bb2c538	128	pid=clus->GetPid();
3bb2c538	129	Int_t pdg = 22;
4b707925	130
3bb2c538	131	if(IsPHOSPIDOn()){
	132	AliDebug(5,Form("E %1.2f; PID: ph %0.2f, pi0 %0.2f, el %0.2f, conv el %0.2f,pi %0.2f, k %0.2f, p %0.2f, k0 %0.2f, n %0.2f, mu %0.2f ",
	133	momentum.E(),pid[AliPID::kPhoton],pid[AliPID::kPi0],pid[AliPID::kElectron],pid[AliPID::kEleCon],pid[AliPID::kPion],
	134	pid[AliPID::kKaon],pid[AliPID::kProton], pid[AliPID::kKaon0],pid[AliPID::kNeutron], pid[AliPID::kMuon]));
	135
	136	Float_t wPhoton = fPHOSPhotonWeight;
	137	Float_t wPi0 = fPHOSPi0Weight;
	138
	139	if(fPHOSWeightFormula){
	140	wPhoton = fPHOSPhotonWeightFormula->Eval(momentum.E()) ;
	141	wPi0 = fPHOSPi0WeightFormula->Eval(momentum.E());
	142	}
	143
	144	if(pid[AliPID::kPhoton] > wPhoton)
	145	pdg = kPhoton ;
	146	else if(pid[AliPID::kPi0] > wPi0)
	147	pdg = kPi0 ;
	148	else if(pid[AliPID::kElectron] > fPHOSElectronWeight)
	149	pdg = kElectron ;
	150	else if(pid[AliPID::kEleCon] > fPHOSElectronWeight)
	151	pdg = kEleCon ;
	152	else if(pid[AliPID::kPion]+pid[AliPID::kKaon]+pid[AliPID::kProton] > fPHOSChargeWeight)
	153	pdg = kChargedHadron ;
	154	else if(pid[AliPID::kKaon0]+pid[AliPID::kNeutron] > fPHOSNeutralWeight)
	155	pdg = kNeutralHadron ;
	156
	157	else if(pid[AliPID::kElectron]+pid[AliPID::kEleCon]+pid[AliPID::kPion]+pid[AliPID::kKaon]+pid[AliPID::kProton] >
	158	pid[AliPID::kPhoton] + pid[AliPID::kPi0]+pid[AliPID::kKaon0]+pid[AliPID::kNeutron])
	159	pdg = kChargedUnknown ;
	160	else
	161	pdg = kNeutralUnknown ;
	162	//neutral cluster, unidentifed.
4b707925	163	}
4b707925	164
3bb2c538	165	if(pdg != kElectron && pdg != kEleCon && pdg !=kChargedHadron && pdg !=kChargedUnknown ){//keep only neutral particles in the array
	166
	167	//###############
	168	//Check kinematics
	169	//###############
	170	Int_t label = clus->GetLabel();
	171	TParticle * pmother = GetMotherParticle(label,stack, "PHOS",momentum);
	172
	173	TParticle * particle = new TParticle(pdg, 1, -1, -1, -1, -1,
	174	momentum.Px(), momentum.Py(), momentum.Pz(), momentum.E(), v[0], v[1], v[2], 0);
	175
	176	AliDebug(4,Form("PHOS added: pdg %d, pt %f, phi %f, eta %f", pdg, particle->Pt(),particle->Phi(),particle->Eta()));
	177	new((plPHOS)[indexPH]) TParticle(particle) ;
	178	new((plPrimPHOS)[indexPH]) TParticle(pmother) ;
	179	indexPH++;
	180
	181	}
	182	else AliDebug(4,Form("PHOS charged cluster NOT added: pdg %d, pt %f, phi %f, eta %f\n",
	183	pdg, momentum.Pt(),momentum.Phi(),momentum.Eta()));
4b707925	184
3bb2c538	185	}//pt, eta, phi cut
	186	else AliDebug(4,"Particle not added");
	187	}//track-match?
	188	}//PHOS cluster
4b707925	189
3bb2c538	190	//################ EMCAL ##############
	191	else if(fSwitchOnEMCAL && type == AliESDCaloCluster::kEMCALClusterv1){
	192	AliDebug(4,Form("EMCAL clusters: E %f, match %d", clus->E(),clus->GetTrackMatched()));
	193
	194	if(clus->GetTrackMatched()==-1 ){
	195	TLorentzVector momentum ;
	196	clus->GetMomentum(momentum, v);
	197	Double_t phi = momentum.Phi();
	198	if(phi<0) phi+=TMath::TwoPi() ;
	199	if(momentum.Pt() > fNeutralPtCut && TMath::Abs(momentum.Eta()) < fEMCALEtaCut &&
	200	phi > fPhiEMCALCut[0] && phi < fPhiEMCALCut[1] ) {
4b707925	201
3bb2c538	202	pid=clus->GetPid();
3bb2c538	203	Int_t pdg = 22;
4b707925	204
3bb2c538	205	if(IsEMCALPIDOn()){
	206	AliDebug(5,Form("E %1.2f; PID: ph %0.2f, pi0 %0.2f, el %0.2f, conv el %0.2f,pi %0.2f, k %0.2f, p %0.2f, k0 %0.2f, n %0.2f, mu %0.2f ",
	207	momentum.E(),pid[AliPID::kPhoton],pid[AliPID::kPi0],pid[AliPID::kElectron],pid[AliPID::kEleCon],pid[AliPID::kPion],
	208	pid[AliPID::kKaon],pid[AliPID::kProton], pid[AliPID::kKaon0],pid[AliPID::kNeutron], pid[AliPID::kMuon]));
	209
	210	if(pid[AliPID::kPhoton] > fEMCALPhotonWeight)
	211	pdg = kPhoton ;
	212	else if(pid[AliPID::kPi0] > fEMCALPi0Weight)
	213	pdg = kPi0 ;
	214	else if(pid[AliPID::kElectron] > fEMCALElectronWeight)
	215	pdg = kElectron ;
	216	else if(pid[AliPID::kEleCon] > fEMCALElectronWeight)
	217	pdg = kEleCon ;
	218	else if(pid[AliPID::kPion]+pid[AliPID::kKaon]+pid[AliPID::kProton] > fEMCALChargeWeight)
	219	pdg = kChargedHadron ;
	220	else if(pid[AliPID::kKaon0]+pid[AliPID::kNeutron] > fEMCALNeutralWeight)
	221	pdg = kNeutralHadron ;
	222	else if(pid[AliPID::kElectron]+pid[AliPID::kEleCon]+pid[AliPID::kPion]+pid[AliPID::kKaon]+pid[AliPID::kProton] >
	223	pid[AliPID::kPhoton] + pid[AliPID::kPi0]+pid[AliPID::kKaon0]+pid[AliPID::kNeutron])
	224	pdg = kChargedUnknown ;
	225	else
	226	pdg = kNeutralUnknown ;
	227	}
	228
	229	if(pdg != kElectron && pdg != kEleCon && pdg !=kChargedHadron && pdg !=kChargedUnknown){//keep only neutral particles in the array
	230
	231	//###############
	232	//Check kinematics
	233	//###############
	234	Int_t label = clus->GetLabel();
	235	TParticle * pmother = GetMotherParticle(label,stack, "EMCAL",momentum);
	236
	237	TParticle * particle = new TParticle(pdg, 1, -1, -1, -1, -1,
	238	momentum.Px(), momentum.Py(), momentum.Pz(), momentum.E(), v[0], v[1], v[2], 0);
	239	AliDebug(4,Form("EMCAL cluster added: pdg %f, pt %f, phi %f, eta %f", pdg, particle->Pt(),particle->Phi(),particle->Eta()));
	240
	241	new((plEMCAL)[indexEM]) TParticle(particle) ;
	242	new((plPrimEMCAL)[indexEM]) TParticle(pmother) ;
	243	indexEM++;
	244	}
	245	else AliDebug(4,Form("EMCAL charged cluster NOT added: pdg %d, pt %f, phi %f, eta %f",
	246	pdg, momentum.Pt(),momentum.Phi(),momentum.Eta()));
	247
	248	}//pt, phi, eta cut
	249	else AliDebug(4,"Particle not added");
	250	}//track-matched
	251	}//EMCAL cluster
4b707925	252
bdcfac30	253	}//cluster loop
bdcfac30	254
3bb2c538	255
3bb2c538	256
bdcfac30	257	//########### CTS (TPC+ITS) #####################
3bb2c538	258	Int_t nTracks = esd->GetNumberOfTracks() ;
bdcfac30	259	Int_t indexCh = plCTS->GetEntries() ;
4b707925	260
3bb2c538	261	if(fSwitchOnCTS){
3bb2c538	262	AliDebug(3,Form("Number of tracks %d",nTracks));
bdcfac30	263
3bb2c538	264	for (npar = 0; npar < nTracks; npar++) {////////////// track loop
3bb2c538	265	AliESDtrack * track = esd->GetTrack(npar) ; // retrieve track from esd
bdcfac30	266
3bb2c538	267	//We want tracks fitted in the detectors:
	268	ULong_t status=AliESDtrack::kTPCrefit;
	269	status\|=AliESDtrack::kITSrefit;
	270
	271	//We want tracks whose PID bit is set:
	272	// ULong_t status =AliESDtrack::kITSpid;
	273	// status\|=AliESDtrack::kTPCpid;
bdcfac30	274
3bb2c538	275	if ( (track->GetStatus() & status) == status) {//Check if the bits we want are set
	276	// Do something with the tracks which were successfully
	277	// re-fitted
	278	Double_t en = 0; //track ->GetTPCsignal() ;
	279	Double_t mom[3];
	280	track->GetPxPyPz(mom) ;
	281	Double_t px = mom[0];
	282	Double_t py = mom[1];
	283	Double_t pz = mom[2]; //Check with TPC people if this is correct.
	284	Int_t pdg = 11; //Give any charged PDG code, in this case electron.
	285	//I just want to tag the particle as charged
4b707925	286
4b707925	287	//Check kinematics
3bb2c538	288	Int_t label = TMath::Abs(track->GetLabel());
	289	TParticle * pmother = new TParticle();
	290	pmother = stack->Particle(label);
4b707925	291
4b707925	292	TParticle * particle = new TParticle(pdg, 1, -1, -1, -1, -1,
3bb2c538	293	px, py, pz, en, v[0], v[1], v[2], 0);
4b707925	294
3bb2c538	295	if(particle->Pt() > fChargedPtCut && TMath::Abs(particle->Eta())<fCTSEtaCut){
	296	new((plCTS)[indexCh]) TParticle(particle) ;
	297	new((plPrimCTS)[indexCh]) TParticle(pmother) ;
	298	indexCh++;
	299
	300	}//kinematic selection
	301	}//select track from refit
	302	}//track loop
	303	}//CTS
bdcfac30	304
3bb2c538	305	AliDebug(3,Form("Particle lists filled, tracks %d , clusters: EMCAL %d, PHOS %d", indexCh,indexEM,indexPH));
	306
	307	}
4b707925	308
4b707925	309	TParticle * AliGammaMCDataReader:: GetMotherParticle(Int_t label, AliStack *stack, TString calo, TLorentzVector momentum)
bdcfac30	310	{
4b707925	311	//Gets the primary particle and do some checks:
	312	//Check if primary is inside calorimeter and look the mother outsie
	313	//Check if mother is a decay photon, in which case check if decay was overlapped
	314
	315	Float_t minangle = 0;
	316	Float_t ipdist = 0;
	317	TParticle * pmother = new TParticle();
bdcfac30	318
4b707925	319	if(calo == "PHOS"){
	320	ipdist= fPHOSIPDistance;
	321	minangle = fPHOSMinAngle;
	322	}
	323	else if (calo == "EMCAL"){
	324	ipdist = fEMCALIPDistance;
	325	minangle = fEMCALMinAngle;
	326	}
bdcfac30	327
bdcfac30	328
4b707925	329	if(label>=0){
	330	pmother = stack->Particle(label);
	331	Int_t mostatus = pmother->GetStatusCode();
	332	Int_t mopdg = TMath::Abs(pmother->GetPdgCode());
	333
	334	//Check if mother is a conversion inside the calorimeter
	335	//In such case, return the mother before the calorimeter.
	336	//First approximation.
	337	Float_t vy = TMath::Abs(pmother->Vy()) ;
bdcfac30	338
4b707925	339	if( mostatus == 0 && vy >= ipdist){
bdcfac30	340
4b707925	341	//cout<<"Calo: "<<calo<<" vy "<<vy<<" E clus "<<momentum.E()<<" Emother "<<pmother->Energy()<<" "
	342	// <<pmother->GetName()<<endl;
	343
	344	while( vy >= ipdist){//inside calorimeter
	345	AliDebug(4,Form("Conversion inside calorimeter, mother vertex %0.2f, IP distance %0.2f", vy, ipdist));
	346	pmother = stack->Particle(pmother->GetMother(0));
	347	vy = TMath::Abs(pmother->Vy()) ;
	348	//cout<<" label "<<label<<" Mother: "<<pmother->GetName()<<" E "<<pmother->Energy()<<" Status "<<pmother->GetStatusCode()<<" and vertex "<<vy<<endl;
	349	mostatus = pmother->GetStatusCode();
	350	mopdg = TMath::Abs(pmother->GetPdgCode());
	351	}//while vertex is inside calorimeter
	352	//cout<<"Calo: "<<calo<<" final vy "<<vy<<" E clus "<<momentum.E()<<" Emother "<<pmother->Energy()<<" "
	353	// <<pmother->GetName()<<endl;
	354	}//check status and vertex
	355
	356	AliDebug(4,Form("%s, ESD E %2.2f, PID %d, mother: E %2.2f, label %d, status %d, vertex %3.2f, mother 2 %d, grandmother %d \n",
	357	calo.Data(),momentum.E(),pmother->Energy(), label, pmother->GetPdgCode(),
	358	pmother->GetStatusCode(), vy, pmother->GetMother(0), stack->GetPrimary(label)));
	359
	360	//Check Decay photons
	361	if(mopdg == 22){
	362
	363	//his mother was a pi0?
	364	TParticle * pmotherpi0 = stack->Particle(pmother->GetMother(0));
	365	if( pmotherpi0->GetPdgCode() == 111){
	366
	367	AliDebug(4,Form(" %s: E cluster %2.2f, E gamma %2.2f, Mother Pi0, E %0.2f, status %d, daughters %d\n",
	368	calo.Data(), momentum.E(),pmother->Energy(),pmotherpi0->Energy(),
	369	pmotherpi0->GetStatusCode(), pmotherpi0->GetNDaughters()));
	370
	371	if(pmotherpi0->GetNDaughters() == 1) mostatus = 2 ; //signal that this photon can only be decay, not overlapped.
	372	else if(pmotherpi0->GetNDaughters() == 2){
	373
	374	TParticle * pd1 = stack->Particle(pmotherpi0->GetDaughter(0));
	375	TParticle * pd2 = stack->Particle(pmotherpi0->GetDaughter(1));
	376	//if(pmotherpi0->Energy()> 10 ){
	377	// cout<<"Two "<<calo<<" daugthers, pi0 label "<<pmother->GetMother(0)<<" E :"<<pmotherpi0->Energy()<<endl;
	378	// cout<<" 1) label "<<pmotherpi0->GetDaughter(0)<<" pdg "<<pd1->GetPdgCode()<<" E "<<pd1->Energy()
	379	// <<" phi "<<pd1->Phi()*TMath::RadToDeg()<<" eta "<<pd1->Eta()
	380	// <<" mother label "<<pd1->GetMother(0)<<" n daug "<<pd1->GetNDaughters() <<endl;
	381	// cout<<" 2) label "<<pmotherpi0->GetDaughter(1)<<" pdg "<<pd2->GetPdgCode()<<" E "<<pd2->Energy()
	382	// <<" phi "<<pd2->Phi()*TMath::RadToDeg()<<" eta "<<pd2->Eta()<<" mother label "
	383	// <<pd2->GetMother(0)<<" n daug "<<pd2->GetNDaughters() <<endl;
	384	//}
	385	if(pd1->GetPdgCode() == 22 && pd2->GetPdgCode() == 22){
	386	TLorentzVector lv1 , lv2 ;
	387	pd1->Momentum(lv1);
	388	pd2->Momentum(lv2);
	389	Double_t angle = lv1.Angle(lv2.Vect());
	390	// if(pmotherpi0->Energy()> 10 )
	391	// cout<<"angleipdist "<<angleipdist<<" mindist "<< minangle <<endl;
	392	if (angle < minangle){
	393	//There is overlapping, pass the pi0 as mother
	394
	395	AliDebug(4,Form(">>>> %s cluster with E %2.2f is a overlapped pi0, E %2.2f, angle %2.4f < anglemin %2.4f\n",
	396	calo.Data(), momentum.E(), pmotherpi0->Energy(), angle, minangle));
	397
	398	pmother = pmotherpi0 ;
	399
	400	}
	401	else mostatus = 2 ; // gamma decay not overlapped
	402	}// daughters are photons
	403	else mostatus = 2; // daughters are e-gamma or e-e, no overlapped, or charged cluster
	404	}//2 daughters
405	else AliDebug(4,Form("pi0 has %d daughters",pmotherpi0->GetNDaughters()));
406	}//pi0 decay photon?
407	}//photon
408
409	pmother->SetStatusCode(mostatus); // if status = 2, decay photon.
410
411	}//label >=0
412	else AliInfo(Form("Negative Kinematic label of PHOS cluster: %d",label));
413
414	return pmother ;
bdcfac30	415
bdcfac30	416	}