[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. 
//
//
//*-- Author: Gustavo Conesa (LNF-INFN) 
//////////////////////////////////////////////////////////////////////////////
  
  
// --- ROOT system --- 
//#include <Riostream.h>
#include <TLorentzVector.h>
#include <TRefArray.h>

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