[u/mrichter/AliRoot.git] / PWG4 / PartCorrBase / AliIsolationCut.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:  $ */

//_________________________________________________________________________
// Class containing methods for the isolation cut. 
// An AOD candidate (AliAODPWG4ParticleCorrelation type)
// is passed. Look in a cone around the candidate and study
// the hadronic activity inside to decide if the candidate is isolated
//
//
//*-- Author: Gustavo Conesa (LNF-INFN) 
//////////////////////////////////////////////////////////////////////////////
  
  
// --- ROOT system --- 
//#include <Riostream.h>
#include <TLorentzVector.h>
#include <TObjArray.h>

// --- AliRoot system --- 
#include "AliIsolationCut.h" 
#include "AliAODPWG4ParticleCorrelation.h"
#include "AliAODTrack.h"
#include "AliAODCaloCluster.h"
#include "AliCaloTrackReader.h"

ClassImp(AliIsolationCut)
  
//____________________________________________________________________________
  AliIsolationCut::AliIsolationCut() : 
    TObject(),
    fConeSize(0.),fPtThreshold(0.), fPtFraction(0.), fICMethod(0)
 
{
  //default ctor
  
  //Initialize parameters
  InitParameters();

}

//____________________________________________________________________________
AliIsolationCut::AliIsolationCut(const AliIsolationCut & g) : 
  TObject(g),
  fConeSize(g.fConeSize),
  fPtThreshold(g.fPtThreshold),
  fPtFraction(g.fPtFraction), 
  fICMethod(g.fICMethod)
{
  // cpy ctor
  
}

//_________________________________________________________________________
AliIsolationCut & AliIsolationCut::operator = (const AliIsolationCut & source)
{
  // assignment operator
  
  if(&source == this) return *this;
  
  fConeSize = source.fConeSize ;
  fPtThreshold = source.fPtThreshold ; 
  fICMethod = source.fICMethod ;
  fPtFraction = source.fPtFraction ;

  return *this;
  
}

//____________________________________________________________________________
TString AliIsolationCut::GetICParametersList()
{
  //Put data member values in string to keep in output container
  
  TString parList ; //this will be list of parameters used for this analysis.
  char onePar[255] ;
  
  sprintf(onePar,"--- AliIsolationCut ---\n") ;
  parList+=onePar ;	
  sprintf(onePar,"fConeSize: (isolation cone size) %1.2f\n",fConeSize) ;
  parList+=onePar ;
  sprintf(onePar,"fPtThreshold =%1.2f (isolation pt threshold) \n",fPtThreshold) ;
  parList+=onePar ;
  sprintf(onePar,"fPtFraction=%1.2f (isolation pt threshold fraction ) \n",fPtFraction) ;
  parList+=onePar ;
  sprintf(onePar,"fICMethod=%d (isolation cut case) \n",fICMethod) ;
  parList+=onePar ;
  
  return parList; 
}

//____________________________________________________________________________
void AliIsolationCut::InitParameters()
{
  //Initialize the parameters of the analysis.
  
  fConeSize             = 0.4 ; 
  fPtThreshold         = 1. ; 
  fPtFraction        = 0.1 ; 
  
  fICMethod = kPtThresIC; // 0 pt threshol method, 1 cone pt sum method
  
}

//__________________________________________________________________
void  AliIsolationCut::MakeIsolationCut(TObjArray * const plCTS,  TObjArray * const plNe, AliCaloTrackReader * const reader, 
					const Bool_t fillAOD, AliAODPWG4ParticleCorrelation  *pCandidate, 
					const TString aodArrayRefName,
					Int_t & n, Int_t & nfrac, Float_t &coneptsum,  Bool_t  &isolated) const
{  
  //Search in cone around a candidate particle if it is isolated 
  Float_t phiC  = pCandidate->Phi() ;
  Float_t etaC = pCandidate->Eta() ;
  Float_t ptC = pCandidate->Pt() ;
  Float_t pt     = -100. ;
  Float_t eta   = -100.  ;
  Float_t phi    = -100.  ;
  Float_t rad   = -100 ;
  n = 0 ;
  coneptsum = 0.; 
  isolated = kFALSE;

  //Initialize the array with refrences
  TObjArray * refclusters = 0x0;
  TObjArray * reftracks    =0x0;

  if(fillAOD) {
    refclusters = new TObjArray;
    reftracks   = new TObjArray;
  }

  //Check charged particles in cone.
  if(plCTS){
    TVector3 p3;
    for(Int_t ipr = 0;ipr < plCTS->GetEntries() ; ipr ++ ){
      AliAODTrack* track = (AliAODTrack *)(plCTS->At(ipr)) ; 
      //Do not count the candidate (pion, conversion photon) or the daughters of the candidate
      if(track->GetID() == pCandidate->GetTrackLabel(0) || track->GetID() == pCandidate->GetTrackLabel(1)) continue ;
      p3.SetXYZ(track->Px(),track->Py(),track->Pz());
      pt   = p3.Pt();
      eta  = p3.Eta();
      phi  = p3.Phi() ;
      if(phi<0) phi+=TMath::TwoPi();
      
      //Check if there is any particle inside cone with pt larger than  fPtThreshold
      rad = TMath::Sqrt((eta-etaC)*(eta-etaC)+ (phi-phiC)*(phi-phiC));
      
      if(rad < fConeSize){
	if(fillAOD) {
	  reftracks->Add(track);
	}
	//printf("charged in isolation cone pt %f, phi %f, eta %f, R %f \n",pt,phi,eta,rad);
	coneptsum+=pt;
	if(pt > fPtThreshold ) n++;
	if(pt > fPtFraction*ptC ) nfrac++;  
      }
    }// charged particle loop
  }//Tracks
  
  //Check neutral particles in cone.  
  if(plNe){
	  
	//Get vertex for photon momentum calculation
	Double_t vertex[]  = {0,0,0} ; //vertex ;
	Double_t vertex2[] = {0,0,0} ; //vertex second AOD input ;
	if(!reader->GetDataType()== AliCaloTrackReader::kMC) 
	{
		reader->GetVertex(vertex);
		if(reader->GetSecondInputAODTree()) reader->GetSecondInputAODVertex(vertex2);
	}
    TLorentzVector mom ;
    for(Int_t ipr = 0;ipr < plNe->GetEntries() ; ipr ++ ){
      AliAODCaloCluster * calo = (AliAODCaloCluster *)(plNe->At(ipr)) ;
      
      //Do not count the candidate (photon or pi0) or the daughters of the candidate
      if(calo->GetID() == pCandidate->GetCaloLabel(0) || calo->GetID() == pCandidate->GetCaloLabel(1)) continue ;      //Skip matched clusters with tracks
      
      if(calo->GetNTracksMatched() > 0) continue ; 
      	//Input from second AOD?
		Int_t input = 0;
		if     (pCandidate->GetDetector() == "EMCAL" && reader->GetAODEMCALNormalInputEntries() <= ipr) input = 1 ;
		else if(pCandidate->GetDetector() == "PHOS"  && reader->GetAODPHOSNormalInputEntries()  <= ipr) input = 1;
		
		//Get Momentum vector, 
		if     (input == 0) calo->GetMomentum(mom,vertex) ;//Assume that come from vertex in straight line
		else if(input == 1) calo->GetMomentum(mom,vertex2);//Assume that come from vertex in straight line  

	  pt   = mom.Pt();
      eta  = mom.Eta();
      phi  = mom.Phi() ;
      if(phi<0) phi+=TMath::TwoPi();
      
      //Check if there is any particle inside cone with pt larger than  fPtThreshold
      rad = TMath::Sqrt((eta-etaC)*(eta-etaC)+ (phi-phiC)*(phi-phiC));
      if(rad < fConeSize){
	if(fillAOD) {
	  refclusters->Add(calo);
	}
	//printf("neutral in isolation cone pt %f, phi %f, eta %f, R %f \n",pt,phi,eta,rad);
	coneptsum+=pt;
	if(pt > fPtThreshold ) n++;
	if(pt > fPtFraction*ptC ) nfrac++;
      }//in cone
    }// neutral particle loop
  }//neutrals
  
  //printf("Isolation Cut: in cone with: pT>pTthres %d, pT > pTfrac*pTcandidate %d \n",n,nfrac);
  
  //Add reference arrays to AOD when filling AODs only
  if(fillAOD) {
	if(refclusters->GetEntriesFast() > 0){ 
		refclusters->SetName(aodArrayRefName+"Clusters");
		pCandidate->AddObjArray(refclusters);
	}
	if(reftracks->GetEntriesFast()   > 0){
		reftracks->SetName(aodArrayRefName+"Tracks");
		pCandidate->AddObjArray(reftracks);
	} 
  }

  //Check isolation, depending on method.
  if( fICMethod == kPtThresIC){
    if(n==0) isolated = kTRUE ;
  }
  else if( fICMethod == kSumPtIC){
    if(coneptsum < fPtThreshold)
      isolated  =  kTRUE ;
  }
  else if( fICMethod == kPtFracIC){
    if(nfrac==0) isolated = kTRUE ;
  }
  else if( fICMethod == kSumPtFracIC){
    if(coneptsum < fPtFraction*ptC)
      isolated  =  kTRUE ;
  }
}

//__________________________________________________________________
void AliIsolationCut::Print(const Option_t * opt) const
{
  
  //Print some relevant parameters set for the analysis
  if(! opt)
    return;
  
  printf("**** Print %s %s **** \n", GetName(), GetTitle() ) ;
  
  printf("IC method          =     %d\n", fICMethod) ; 
  printf("Cone Size          =     %1.2f\n", fConeSize) ; 
  printf("pT threshold       =     %2.1f\n", fPtThreshold) ;
  printf("pT fraction        =     %3.1f\n", fPtFraction) ;

  printf("    \n") ;
  
}
Commit	Line	Data
1c5acb87	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	/* $Id: $ */
	16
	17	//_________________________________________________________________________
	18	// Class containing methods for the isolation cut.
591cc579	19	// An AOD candidate (AliAODPWG4ParticleCorrelation type)
	20	// is passed. Look in a cone around the candidate and study
	21	// the hadronic activity inside to decide if the candidate is isolated
1c5acb87	22	//
	23	//
	24	//*-- Author: Gustavo Conesa (LNF-INFN)
	25	//////////////////////////////////////////////////////////////////////////////
	26
	27
	28	// --- ROOT system ---
	29	//#include <Riostream.h>
	30	#include <TLorentzVector.h>
591cc579	31	#include <TObjArray.h>
1c5acb87	32
	33	// --- AliRoot system ---
	34	#include "AliIsolationCut.h"
1c5acb87	35	#include "AliAODPWG4ParticleCorrelation.h"
	36	#include "AliAODTrack.h"
	37	#include "AliAODCaloCluster.h"
233e0df8	38	#include "AliCaloTrackReader.h"
1c5acb87	39
	40	ClassImp(AliIsolationCut)
	41
	42	//____________________________________________________________________________
	43	AliIsolationCut::AliIsolationCut() :
	44	TObject(),
	45	fConeSize(0.),fPtThreshold(0.), fPtFraction(0.), fICMethod(0)
	46
	47	{
	48	//default ctor
	49
	50	//Initialize parameters
	51	InitParameters();
	52
	53	}
	54
	55	//____________________________________________________________________________
	56	AliIsolationCut::AliIsolationCut(const AliIsolationCut & g) :
	57	TObject(g),
	58	fConeSize(g.fConeSize),
	59	fPtThreshold(g.fPtThreshold),
	60	fPtFraction(g.fPtFraction),
	61	fICMethod(g.fICMethod)
	62	{
	63	// cpy ctor
477d6cee	64
1c5acb87	65	}
	66
	67	//_________________________________________________________________________
	68	AliIsolationCut & AliIsolationCut::operator = (const AliIsolationCut & source)
	69	{
	70	// assignment operator
	71
	72	if(&source == this) return *this;
477d6cee	73
1c5acb87	74	fConeSize = source.fConeSize ;
	75	fPtThreshold = source.fPtThreshold ;
	76	fICMethod = source.fICMethod ;
	77	fPtFraction = source.fPtFraction ;
	78
	79	return *this;
	80
	81	}
	82
1c5acb87	83	//____________________________________________________________________________
	84	TString AliIsolationCut::GetICParametersList()
	85	{
477d6cee	86	//Put data member values in string to keep in output container
	87
	88	TString parList ; //this will be list of parameters used for this analysis.
	89	char onePar[255] ;
	90
	91	sprintf(onePar,"--- AliIsolationCut ---\n") ;
	92	parList+=onePar ;
	93	sprintf(onePar,"fConeSize: (isolation cone size) %1.2f\n",fConeSize) ;
	94	parList+=onePar ;
	95	sprintf(onePar,"fPtThreshold =%1.2f (isolation pt threshold) \n",fPtThreshold) ;
	96	parList+=onePar ;
	97	sprintf(onePar,"fPtFraction=%1.2f (isolation pt threshold fraction ) \n",fPtFraction) ;
	98	parList+=onePar ;
	99	sprintf(onePar,"fICMethod=%d (isolation cut case) \n",fICMethod) ;
	100	parList+=onePar ;
	101
	102	return parList;
1c5acb87	103	}
	104
	105	//____________________________________________________________________________
	106	void AliIsolationCut::InitParameters()
	107	{
	108	//Initialize the parameters of the analysis.
477d6cee	109
1c5acb87	110	fConeSize = 0.4 ;
	111	fPtThreshold = 1. ;
	112	fPtFraction = 0.1 ;
477d6cee	113
1c5acb87	114	fICMethod = kPtThresIC; // 0 pt threshol method, 1 cone pt sum method
477d6cee	115
1c5acb87	116	}
	117
	118	//__________________________________________________________________
233e0df8	119	void AliIsolationCut::MakeIsolationCut(TObjArray * const plCTS, TObjArray * const plNe, AliCaloTrackReader * const reader,
1c5acb87	120	const Bool_t fillAOD, AliAODPWG4ParticleCorrelation *pCandidate,
a3aebfff	121	const TString aodArrayRefName,
1c5acb87	122	Int_t & n, Int_t & nfrac, Float_t &coneptsum, Bool_t &isolated) const
1c5acb87	123	{
477d6cee	124	//Search in cone around a candidate particle if it is isolated
	125	Float_t phiC = pCandidate->Phi() ;
	126	Float_t etaC = pCandidate->Eta() ;
	127	Float_t ptC = pCandidate->Pt() ;
	128	Float_t pt = -100. ;
	129	Float_t eta = -100. ;
	130	Float_t phi = -100. ;
	131	Float_t rad = -100 ;
477d6cee	132	n = 0 ;
	133	coneptsum = 0.;
	134	isolated = kFALSE;
a3aebfff	135
a3aebfff	136	//Initialize the array with refrences
591cc579	137	TObjArray * refclusters = 0x0;
591cc579	138	TObjArray * reftracks =0x0;
a3aebfff	139
a3aebfff	140	if(fillAOD) {
591cc579	141	refclusters = new TObjArray;
233e0df8	142	reftracks = new TObjArray;
a3aebfff	143	}
a3aebfff	144
477d6cee	145	//Check charged particles in cone.
	146	if(plCTS){
	147	TVector3 p3;
	148	for(Int_t ipr = 0;ipr < plCTS->GetEntries() ; ipr ++ ){
	149	AliAODTrack* track = (AliAODTrack *)(plCTS->At(ipr)) ;
	150	//Do not count the candidate (pion, conversion photon) or the daughters of the candidate
	151	if(track->GetID() == pCandidate->GetTrackLabel(0) \|\| track->GetID() == pCandidate->GetTrackLabel(1)) continue ;
	152	p3.SetXYZ(track->Px(),track->Py(),track->Pz());
	153	pt = p3.Pt();
	154	eta = p3.Eta();
	155	phi = p3.Phi() ;
	156	if(phi<0) phi+=TMath::TwoPi();
	157
	158	//Check if there is any particle inside cone with pt larger than fPtThreshold
	159	rad = TMath::Sqrt((eta-etaC)(eta-etaC)+ (phi-phiC)(phi-phiC));
	160
	161	if(rad < fConeSize){
	162	if(fillAOD) {
a3aebfff	163	reftracks->Add(track);
1c5acb87	164	}
477d6cee	165	//printf("charged in isolation cone pt %f, phi %f, eta %f, R %f \n",pt,phi,eta,rad);
	166	coneptsum+=pt;
	167	if(pt > fPtThreshold ) n++;
	168	if(pt > fPtFraction*ptC ) nfrac++;
	169	}
	170	}// charged particle loop
	171	}//Tracks
	172
	173	//Check neutral particles in cone.
	174	if(plNe){
233e0df8	175
	176	//Get vertex for photon momentum calculation
	177	Double_t vertex[] = {0,0,0} ; //vertex ;
	178	Double_t vertex2[] = {0,0,0} ; //vertex second AOD input ;
	179	if(!reader->GetDataType()== AliCaloTrackReader::kMC)
	180	{
	181	reader->GetVertex(vertex);
	182	if(reader->GetSecondInputAODTree()) reader->GetSecondInputAODVertex(vertex2);
	183	}
477d6cee	184	TLorentzVector mom ;
	185	for(Int_t ipr = 0;ipr < plNe->GetEntries() ; ipr ++ ){
	186	AliAODCaloCluster * calo = (AliAODCaloCluster *)(plNe->At(ipr)) ;
	187
	188	//Do not count the candidate (photon or pi0) or the daughters of the candidate
	189	if(calo->GetID() == pCandidate->GetCaloLabel(0) \|\| calo->GetID() == pCandidate->GetCaloLabel(1)) continue ; //Skip matched clusters with tracks
	190
	191	if(calo->GetNTracksMatched() > 0) continue ;
233e0df8	192	//Input from second AOD?
	193	Int_t input = 0;
	194	if (pCandidate->GetDetector() == "EMCAL" && reader->GetAODEMCALNormalInputEntries() <= ipr) input = 1 ;
	195	else if(pCandidate->GetDetector() == "PHOS" && reader->GetAODPHOSNormalInputEntries() <= ipr) input = 1;
	196
	197	//Get Momentum vector,
	198	if (input == 0) calo->GetMomentum(mom,vertex) ;//Assume that come from vertex in straight line
	199	else if(input == 1) calo->GetMomentum(mom,vertex2);//Assume that come from vertex in straight line
	200
	201	pt = mom.Pt();
477d6cee	202	eta = mom.Eta();
	203	phi = mom.Phi() ;
	204	if(phi<0) phi+=TMath::TwoPi();
	205
	206	//Check if there is any particle inside cone with pt larger than fPtThreshold
	207	rad = TMath::Sqrt((eta-etaC)(eta-etaC)+ (phi-phiC)(phi-phiC));
	208	if(rad < fConeSize){
	209	if(fillAOD) {
a3aebfff	210	refclusters->Add(calo);
1c5acb87	211	}
477d6cee	212	//printf("neutral in isolation cone pt %f, phi %f, eta %f, R %f \n",pt,phi,eta,rad);
	213	coneptsum+=pt;
	214	if(pt > fPtThreshold ) n++;
	215	if(pt > fPtFraction*ptC ) nfrac++;
	216	}//in cone
	217	}// neutral particle loop
	218	}//neutrals
	219
	220	//printf("Isolation Cut: in cone with: pT>pTthres %d, pT > pTfrac*pTcandidate %d \n",n,nfrac);
	221
a3aebfff	222	//Add reference arrays to AOD when filling AODs only
	223	if(fillAOD) {
	224	if(refclusters->GetEntriesFast() > 0){
	225	refclusters->SetName(aodArrayRefName+"Clusters");
591cc579	226	pCandidate->AddObjArray(refclusters);
a3aebfff	227	}
	228	if(reftracks->GetEntriesFast() > 0){
	229	reftracks->SetName(aodArrayRefName+"Tracks");
591cc579	230	pCandidate->AddObjArray(reftracks);
a3aebfff	231	}
	232	}
	233
477d6cee	234	//Check isolation, depending on method.
	235	if( fICMethod == kPtThresIC){
	236	if(n==0) isolated = kTRUE ;
	237	}
	238	else if( fICMethod == kSumPtIC){
	239	if(coneptsum < fPtThreshold)
	240	isolated = kTRUE ;
	241	}
	242	else if( fICMethod == kPtFracIC){
	243	if(nfrac==0) isolated = kTRUE ;
	244	}
	245	else if( fICMethod == kSumPtFracIC){
	246	if(coneptsum < fPtFraction*ptC)
	247	isolated = kTRUE ;
	248	}
1c5acb87	249	}
	250
	251	//__________________________________________________________________
	252	void AliIsolationCut::Print(const Option_t * opt) const
	253	{
	254
	255	//Print some relevant parameters set for the analysis
	256	if(! opt)
	257	return;
	258
	259	printf("** Print %s %s ** \n", GetName(), GetTitle() ) ;
	260
	261	printf("IC method = %d\n", fICMethod) ;
	262	printf("Cone Size = %1.2f\n", fConeSize) ;
	263	printf("pT threshold = %2.1f\n", fPtThreshold) ;
	264	printf("pT fraction = %3.1f\n", fPtFraction) ;
	265
	266	printf(" \n") ;
	267
	268	}