[u/mrichter/AliRoot.git] / PWG3 / vertexingHF / AliAnalysisTaskSEBkgLikeSignD0.cxx

/**************************************************************************
 * Copyright(c) 1998-2009, 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.                  *
 **************************************************************************/

///////////////////////////////////////////////////////////////////////////
//
// AliAnalysisTaskSE for reading both reconstructed D0->Kpi candidates
// and like sign pairs and for drawing corresponding distributions
//
// Author: C.Di Giglio, carmelo.digiglio@ba.infn.it
///////////////////////////////////////////////////////////////////////////

#include <TSystem.h>
#include <TROOT.h>
#include <TClonesArray.h>
#include <TList.h>
#include <TH1F.h>

#include "AliAODEvent.h"
#include "AliAODVertex.h"
#include "AliAODTrack.h"
#include "AliAODRecoDecayHF2Prong.h"
#include "AliAnalysisVertexingHF.h"
#include "AliAnalysisTaskSE.h"
#include "AliAnalysisTaskSEBkgLikeSignD0.h"

ClassImp(AliAnalysisTaskSEBkgLikeSignD0)

//________________________________________________________________________
AliAnalysisTaskSEBkgLikeSignD0::AliAnalysisTaskSEBkgLikeSignD0():
AliAnalysisTaskSE(),
fOutput(0), 
fHistMassD0(0),
fHistMassLS(0),
fHistCtsD0(0),           
fHistCtsLS(0),
fHistCtsLSpos(0),
fHistCtsLSneg(0),
fHistCPtaD0(0),          
fHistCPtaLS(0),
fHistd0d0D0(0),          
fHistd0d0LS(0),
fHistDCAD0(0),           
fHistDCALS(0),
fVHF(0),
fNentries(0),
fTotPosPairs(0),
fTotNegPairs(0),
fLsNormalization(1.)
{
  //
  // Default constructor
  //
}

//________________________________________________________________________
AliAnalysisTaskSEBkgLikeSignD0::AliAnalysisTaskSEBkgLikeSignD0(const char *name):
AliAnalysisTaskSE(name),
fOutput(0),
fHistMassD0(0),
fHistMassLS(0),
fHistCtsD0(0),
fHistCtsLS(0),
fHistCtsLSpos(0),
fHistCtsLSneg(0),
fHistCPtaD0(0),
fHistCPtaLS(0),
fHistd0d0D0(0),
fHistd0d0LS(0),
fHistDCAD0(0),
fHistDCALS(0),
fVHF(0),
fNentries(0),
fTotPosPairs(0),
fTotNegPairs(0),
fLsNormalization(1.)
{
  //
  // Standard constructor
  //
  // Output slot #1 writes into a TList container
  DefineOutput(1,TList::Class());  //My private output
  // Output slot #2 writes into a TH1F container
  DefineOutput(2,TH1F::Class());  //My private output

}

//________________________________________________________________________
AliAnalysisTaskSEBkgLikeSignD0::~AliAnalysisTaskSEBkgLikeSignD0()
{
  // Destructor
  if (fOutput) {
    delete fOutput;
    fOutput = 0;
  }

  if (fVHF) {
    delete fVHF;
    fVHF = 0;
  }

  if (fNentries){
    delete fNentries;
    fNentries = 0;
  }

}
//________________________________________________________________________
void AliAnalysisTaskSEBkgLikeSignD0::Init()
{
  // Initialization

  if(fDebug > 1) printf("AnalysisTaskSEBkgLikeSignD0::Init() \n");

  gROOT->LoadMacro("ConfigVertexingHF.C");

  fVHF = (AliAnalysisVertexingHF*)gROOT->ProcessLine("ConfigVertexingHF()");
  fVHF->SetD0toKpiCuts(0.7,0.02,0.8,0.7,0.7,1,1,-0.00025,0.8);
  fVHF->PrintStatus();

  return;
}

//________________________________________________________________________
void AliAnalysisTaskSEBkgLikeSignD0::UserCreateOutputObjects()
{
  // Create the output container
  //
  if(fDebug > 1) printf("AnalysisTaskSEBkgLikeSignD0::UserCreateOutputObjects() \n");

  // Several histograms are more conveniently managed in a TList
  fOutput = new TList();
  fOutput->SetOwner();

  fHistMassD0 = new TH1F("fHistMassD0", "D0 invariant mass; M [GeV]; Entries",200,1.765,1.965);
  fHistMassD0->Sumw2();
  fHistMassD0->SetMinimum(0);
  fOutput->Add(fHistMassD0);

  fHistMassLS = new TH1F("fHistMassLS", "Like sign pairs invariant mass; M [GeV]; Entries",200,1.765,1.965);
  fHistMassLS->Sumw2();
  fHistMassLS->SetMinimum(0);
  fOutput->Add(fHistMassLS);

  fHistCtsD0 = new TH1F("fHistCtsD0", "D0 cosine of decay angle; Cos#Theta*; Entries",200,-1.,1.);
  fHistCtsD0->Sumw2();
  fHistCtsD0->SetMinimum(0);
  fOutput->Add(fHistCtsD0);

  fHistCtsLS = new TH1F("fHistCtsLS", "Like sign pairs cosine of decay angle; Cos#Theta*; Entries",200,-1.,1.);
  fHistCtsLS->Sumw2();
  fHistCtsLS->SetMinimum(0);
  fOutput->Add(fHistCtsLS);

  fHistCtsLSpos = new TH1F("fHistCtsLSpos", "Like sign ++ pairs cosine of decay angle; Cos#Theta*; Entries",200,-1.,1.);
  fHistCtsLSpos->Sumw2();
  fHistCtsLSpos->SetMinimum(0);
  fOutput->Add(fHistCtsLSpos);

  fHistCtsLSneg = new TH1F("fHistCtsLSneg", "Like sign -- pairs cosine of decay angle; Cos#Theta*; Entries",200,-1.,1.);
  fHistCtsLSneg->Sumw2();
  fHistCtsLSneg->SetMinimum(0);
  fOutput->Add(fHistCtsLSneg);

  fHistCPtaD0 = new TH1F("fHistCPtaD0", "D0 cosine of pointing angle; Cos#Theta_{point}; Entries",200,0,1.);
  fHistCPtaD0->Sumw2();
  fHistCPtaD0->SetMinimum(0);
  fOutput->Add(fHistCPtaD0);

  fHistCPtaLS = new TH1F("fHistCPtaLS", "Like sign pairs cosine of pointing angle; Cos#Theta_{point}; Entries",200,0,1.);
  fHistCPtaLS->Sumw2();
  fHistCPtaLS->SetMinimum(0);
  fOutput->Add(fHistCPtaLS);

  fHistd0d0D0 = new TH1F("fHistd0d0D0", "D0 product of impact parameters; d0xd0 [#mu m^{2}]; Entries",200,-100000.,100000.);
  fHistd0d0D0->Sumw2(); 
  fHistd0d0D0->SetMinimum(0);
  fOutput->Add(fHistd0d0D0);

  fHistd0d0LS = new TH1F("fHistd0d0LS", "Like sign pairs product of impact parameters; d0xd0 [#mu m^{2}]; Entries",200,-100000.,100000.);
  fHistd0d0LS->Sumw2();
  fHistd0d0LS->SetMinimum(0);
  fOutput->Add(fHistd0d0LS);

  fHistDCAD0 = new TH1F("fHistDCAD0", "D0 distance of closest approach; dca [10^{2}#mu m]; Entries",100,0.,5.);
  fHistDCAD0->Sumw2(); 
  fHistDCAD0->SetMinimum(0);
  fOutput->Add(fHistDCAD0);

  fHistDCALS = new TH1F("fHistDCALS", "Like sign pairs distance of closest approach; dca [10^{2}#mu m]; Entries",100,0.,5.);
  fHistDCALS->Sumw2(); 
  fHistDCALS->SetMinimum(0);
  fOutput->Add(fHistDCALS);

  fNentries=new TH1F("nentriesLS", "Look at the number of entries! it is = to the  number of AODs", 2,1.,2.);

  return;
}

//________________________________________________________________________
void AliAnalysisTaskSEBkgLikeSignD0::UserExec(Option_t */*option*/)
{
  // Execute analysis for current event:
  // heavy flavor candidates association to MC truth
  
  AliAODEvent *aod = dynamic_cast<AliAODEvent*> (InputEvent());

  // In case there is an AOD handler writing a standard AOD, use the AOD 
  // event in memory rather than the input (ESD) event.
  if (!aod && AODEvent() && IsStandardAOD()) aod = dynamic_cast<AliAODEvent*> (AODEvent());

  // load heavy flavour vertices
  TClonesArray *arrayVerticesHF =
    (TClonesArray*)aod->GetList()->FindObject("VerticesHF");
  if(!arrayVerticesHF) {
    printf("AliAnalysisTaskSEBkgLikeSignD0::UserExec: VerticesHF branch not found!\n");
    return;
  }

  // load D0->ee candidates                                                   
  TClonesArray *arrayD0toKpi =
    (TClonesArray*)aod->GetList()->FindObject("D0toKpi");
  if(!arrayD0toKpi) {
    printf("AliAnalysisTaskSEBkgLikeSignD0::UserExec: D0toKpi branch not found!\n");
    return;
  }

  // load like sign candidates
  TClonesArray *arrayLikeSign =
    (TClonesArray*)aod->GetList()->FindObject("LikeSign2Prong");
  if(!arrayLikeSign) {
    printf("AliAnalysisTaskSEBkgLikeSignD0::UserExec: LikeSign2Prong branch not found!\n");
    return;
  }

  // AOD primary vertex
  AliAODVertex *vtx1 = (AliAODVertex*)aod->GetPrimaryVertex();

  // make trkIDtoEntry register (temporary)
  Int_t trkIDtoEntry[100000];
  for(Int_t it=0;it<aod->GetNumberOfTracks();it++) {
    AliAODTrack *track = aod->GetTrack(it);
    trkIDtoEntry[track->GetID()]=it;
  }

  //histogram filled with 1 for every AOD
  fNentries->Fill(1);
  PostData(2,fNentries);

  // loop over Like sign candidates
  Int_t nPosPairs=0,nNegPairs=0;
  Int_t nLikeSign = arrayLikeSign->GetEntriesFast();
  if(fDebug>1) printf("+++\n+++Number of like sign pairs ---> %d \n+++\n", nLikeSign);

  for(Int_t iLikeSign = 0; iLikeSign < nLikeSign; iLikeSign++) {
    AliAODRecoDecayHF2Prong *d = (AliAODRecoDecayHF2Prong*)arrayLikeSign->UncheckedAt(iLikeSign);
    Bool_t unsetvtx=kFALSE;
    if(!d->GetOwnPrimaryVtx()) {
        d->SetOwnPrimaryVtx(vtx1); // needed to compute all variables
        unsetvtx=kTRUE;
    }
    Int_t okD0ls=0; Int_t okD0barls=0;
    if(d->SelectD0(fVHF->GetD0toKpiCuts(),okD0ls,okD0barls)) {
       AliAODTrack *trk0 = (AliAODTrack*)d->GetDaughter(0);
       AliAODTrack *trk1 = (AliAODTrack*)d->GetDaughter(1);
       if(!trk0 || !trk1) {
          trk0=aod->GetTrack(trkIDtoEntry[d->GetProngID(0)]);
          trk1=aod->GetTrack(trkIDtoEntry[d->GetProngID(1)]);
          printf("references to standard AOD not available \n");
       }
       if(okD0ls) fHistMassLS->Fill(d->InvMassD0());
       if(okD0barls) fHistMassLS->Fill(d->InvMassD0bar());
       fHistCPtaLS->Fill(d->CosPointingAngle());
       fHistd0d0LS->Fill(1e8*d->Prodd0d0());
       if(okD0ls) fHistCtsLS->Fill(d->CosThetaStarD0());
       if(okD0barls) fHistCtsLS->Fill(d->CosThetaStarD0bar());
       fHistDCALS->Fill(100*d->GetDCA());
       //PostData(1,fOutput);
       if((trk0->Charge())==1) {
          nPosPairs++;
          fHistCtsLSpos->Fill(d->CosThetaStarD0());
          //PostData(1,fOutput);
        } else {
          nNegPairs++;
          fHistCtsLSneg->Fill(d->CosThetaStarD0());
          //PostData(1,fOutput);
        }
      PostData(1,fOutput);
      }
    if(unsetvtx) d->UnsetOwnPrimaryVtx();
  }

  if(fDebug>1) printf("------------ N. of positive pairs in Event ----- %d \n", nPosPairs);
  if(fDebug>1) printf("------------ N. of negative pairs in Event ----- %d \n", nNegPairs);

  fTotPosPairs += nPosPairs;
  fTotNegPairs += nNegPairs;

  // loop over D0 candidates
  Int_t nD0toKpi = arrayD0toKpi->GetEntriesFast();
  if(fDebug>1) printf("Number of like D0 -> Kpi candidates ---> %d \n", nD0toKpi);

  for (Int_t iD0toKpi = 0; iD0toKpi < nD0toKpi; iD0toKpi++) {
    AliAODRecoDecayHF2Prong *d = (AliAODRecoDecayHF2Prong*)arrayD0toKpi->UncheckedAt(iD0toKpi);
    Bool_t unsetvtx=kFALSE;
    if(!d->GetOwnPrimaryVtx()) {
      d->SetOwnPrimaryVtx(vtx1); // needed to compute all variables
      unsetvtx=kTRUE;
    }
    Int_t okD0=0; Int_t okD0bar=0;
    if(d->SelectD0(fVHF->GetD0toKpiCuts(),okD0,okD0bar)) {
      fHistMassD0->Fill(d->InvMassD0());
      fHistMassD0->Fill(d->InvMassD0bar());
      fHistCtsD0->Fill(d->CosThetaStarD0());
      fHistCtsD0->Fill(d->CosThetaStarD0bar());
      fHistd0d0D0->Fill(1e8*d->Prodd0d0());
      fHistCPtaD0->Fill(d->CosPointingAngle());
      fHistDCAD0->Fill(100*d->GetDCA());
      PostData(1,fOutput);
    }
   if(unsetvtx) d->UnsetOwnPrimaryVtx();
  }

  return;
}

//________________________________________________________________________
void AliAnalysisTaskSEBkgLikeSignD0::Terminate(Option_t */*option*/)
{
  // Terminate analysis
  //
  if(fDebug > 1) printf("AnalysisTaskSEBkgLikeSignD0: Terminate() \n");

  fOutput = dynamic_cast<TList*> (GetOutputData(1));
  if (!fOutput) {     
    printf("ERROR: fOutput not available\n");
    return;
  }

  fLsNormalization = 2.*TMath::Sqrt(fTotPosPairs*fTotNegPairs); 

  fHistMassD0   = dynamic_cast<TH1F*>(fOutput->FindObject("fHistMassD0"));
  fHistMassLS   = dynamic_cast<TH1F*>(fOutput->FindObject("fHistMassLS"));
  fHistCtsD0    = dynamic_cast<TH1F*>(fOutput->FindObject("fHistCtsD0"));
  fHistCtsLS    = dynamic_cast<TH1F*>(fOutput->FindObject("fHistCtsLS"));
  fHistCtsLSpos = dynamic_cast<TH1F*>(fOutput->FindObject("fHistCtsLSpos"));
  fHistCtsLSneg = dynamic_cast<TH1F*>(fOutput->FindObject("fHistCtsLSneg"));
  fHistCPtaD0   = dynamic_cast<TH1F*>(fOutput->FindObject("fHistCPtaD0"));
  fHistCPtaLS   = dynamic_cast<TH1F*>(fOutput->FindObject("fHistCPtaLS"));
  fHistd0d0D0   = dynamic_cast<TH1F*>(fOutput->FindObject("fHistd0d0D0"));
  fHistd0d0LS   = dynamic_cast<TH1F*>(fOutput->FindObject("fHistd0d0LS"));
  fHistDCAD0    = dynamic_cast<TH1F*>(fOutput->FindObject("fHistDCAD0"));
  fHistDCALS    = dynamic_cast<TH1F*>(fOutput->FindObject("fHistDCALS"));

  if(fLsNormalization>0) {
    fHistMassLS->Scale((1/fLsNormalization)*fHistMassLS->GetEntries());
    fHistCtsLS->Scale((1/fLsNormalization)*fHistCtsLS->GetEntries());
    fHistCtsLSpos->Scale((1/fLsNormalization)*fHistCtsLSpos->GetEntries());
    fHistCtsLSneg->Scale((1/fLsNormalization)*fHistCtsLSneg->GetEntries());
    fHistCPtaLS->Scale((1/fLsNormalization)*fHistCPtaLS->GetEntries());
    fHistd0d0LS->Scale((1/fLsNormalization)*fHistd0d0LS->GetEntries());
    fHistDCALS->Scale((1/fLsNormalization)*fHistDCALS->GetEntries());
  }

  return;
}
Commit	Line	Data
17e8df02	1	/**************************************************************************
	2	* Copyright(c) 1998-2009, 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	///////////////////////////////////////////////////////////////////////////
	17	//
	18	// AliAnalysisTaskSE for reading both reconstructed D0->Kpi candidates
	19	// and like sign pairs and for drawing corresponding distributions
	20	//
	21	// Author: C.Di Giglio, carmelo.digiglio@ba.infn.it
	22	///////////////////////////////////////////////////////////////////////////
	23
	24	#include <TSystem.h>
	25	#include <TROOT.h>
	26	#include <TClonesArray.h>
	27	#include <TList.h>
	28	#include <TH1F.h>
	29
	30	#include "AliAODEvent.h"
	31	#include "AliAODVertex.h"
	32	#include "AliAODTrack.h"
	33	#include "AliAODRecoDecayHF2Prong.h"
	34	#include "AliAnalysisVertexingHF.h"
	35	#include "AliAnalysisTaskSE.h"
	36	#include "AliAnalysisTaskSEBkgLikeSignD0.h"
	37
	38	ClassImp(AliAnalysisTaskSEBkgLikeSignD0)
	39
	40	//________________________________________________________________________
	41	AliAnalysisTaskSEBkgLikeSignD0::AliAnalysisTaskSEBkgLikeSignD0():
	42	AliAnalysisTaskSE(),
	43	fOutput(0),
	44	fHistMassD0(0),
	45	fHistMassLS(0),
	46	fHistCtsD0(0),
	47	fHistCtsLS(0),
	48	fHistCtsLSpos(0),
	49	fHistCtsLSneg(0),
	50	fHistCPtaD0(0),
	51	fHistCPtaLS(0),
	52	fHistd0d0D0(0),
	53	fHistd0d0LS(0),
	54	fHistDCAD0(0),
	55	fHistDCALS(0),
	56	fVHF(0),
2cc87fa1	57	fNentries(0),
17e8df02	58	fTotPosPairs(0),
	59	fTotNegPairs(0),
	60	fLsNormalization(1.)
	61	{
	62	//
	63	// Default constructor
	64	//
	65	}
	66
	67	//________________________________________________________________________
	68	AliAnalysisTaskSEBkgLikeSignD0::AliAnalysisTaskSEBkgLikeSignD0(const char *name):
	69	AliAnalysisTaskSE(name),
	70	fOutput(0),
	71	fHistMassD0(0),
	72	fHistMassLS(0),
	73	fHistCtsD0(0),
	74	fHistCtsLS(0),
	75	fHistCtsLSpos(0),
	76	fHistCtsLSneg(0),
	77	fHistCPtaD0(0),
	78	fHistCPtaLS(0),
	79	fHistd0d0D0(0),
	80	fHistd0d0LS(0),
	81	fHistDCAD0(0),
	82	fHistDCALS(0),
	83	fVHF(0),
2cc87fa1	84	fNentries(0),
17e8df02	85	fTotPosPairs(0),
	86	fTotNegPairs(0),
	87	fLsNormalization(1.)
	88	{
	89	//
	90	// Standard constructor
	91	//
	92	// Output slot #1 writes into a TList container
	93	DefineOutput(1,TList::Class()); //My private output
a27a5626	94	// Output slot #2 writes into a TH1F container
	95	DefineOutput(2,TH1F::Class()); //My private output
	96
17e8df02	97	}
	98
	99	//________________________________________________________________________
	100	AliAnalysisTaskSEBkgLikeSignD0::~AliAnalysisTaskSEBkgLikeSignD0()
	101	{
	102	// Destructor
	103	if (fOutput) {
	104	delete fOutput;
	105	fOutput = 0;
	106	}
	107
	108	if (fVHF) {
	109	delete fVHF;
	110	fVHF = 0;
	111	}
	112
a27a5626	113	if (fNentries){
	114	delete fNentries;
	115	fNentries = 0;
	116	}
	117
17e8df02	118	}
	119	//________________________________________________________________________
	120	void AliAnalysisTaskSEBkgLikeSignD0::Init()
	121	{
	122	// Initialization
	123
	124	if(fDebug > 1) printf("AnalysisTaskSEBkgLikeSignD0::Init() \n");
	125
	126	gROOT->LoadMacro("ConfigVertexingHF.C");
	127
	128	fVHF = (AliAnalysisVertexingHF*)gROOT->ProcessLine("ConfigVertexingHF()");
a27a5626	129	fVHF->SetD0toKpiCuts(0.7,0.02,0.8,0.7,0.7,1,1,-0.00025,0.8);
17e8df02	130	fVHF->PrintStatus();
	131
	132	return;
	133	}
	134
	135	//________________________________________________________________________
	136	void AliAnalysisTaskSEBkgLikeSignD0::UserCreateOutputObjects()
	137	{
	138	// Create the output container
	139	//
	140	if(fDebug > 1) printf("AnalysisTaskSEBkgLikeSignD0::UserCreateOutputObjects() \n");
	141
	142	// Several histograms are more conveniently managed in a TList
	143	fOutput = new TList();
	144	fOutput->SetOwner();
	145
a27a5626	146	fHistMassD0 = new TH1F("fHistMassD0", "D0 invariant mass; M [GeV]; Entries",200,1.765,1.965);
17e8df02	147	fHistMassD0->Sumw2();
	148	fHistMassD0->SetMinimum(0);
	149	fOutput->Add(fHistMassD0);
	150
a27a5626	151	fHistMassLS = new TH1F("fHistMassLS", "Like sign pairs invariant mass; M [GeV]; Entries",200,1.765,1.965);
17e8df02	152	fHistMassLS->Sumw2();
	153	fHistMassLS->SetMinimum(0);
	154	fOutput->Add(fHistMassLS);
	155
	156	fHistCtsD0 = new TH1F("fHistCtsD0", "D0 cosine of decay angle; Cos#Theta*; Entries",200,-1.,1.);
	157	fHistCtsD0->Sumw2();
	158	fHistCtsD0->SetMinimum(0);
	159	fOutput->Add(fHistCtsD0);
	160
	161	fHistCtsLS = new TH1F("fHistCtsLS", "Like sign pairs cosine of decay angle; Cos#Theta*; Entries",200,-1.,1.);
	162	fHistCtsLS->Sumw2();
	163	fHistCtsLS->SetMinimum(0);
	164	fOutput->Add(fHistCtsLS);
	165
	166	fHistCtsLSpos = new TH1F("fHistCtsLSpos", "Like sign ++ pairs cosine of decay angle; Cos#Theta*; Entries",200,-1.,1.);
	167	fHistCtsLSpos->Sumw2();
	168	fHistCtsLSpos->SetMinimum(0);
	169	fOutput->Add(fHistCtsLSpos);
	170
	171	fHistCtsLSneg = new TH1F("fHistCtsLSneg", "Like sign -- pairs cosine of decay angle; Cos#Theta*; Entries",200,-1.,1.);
	172	fHistCtsLSneg->Sumw2();
	173	fHistCtsLSneg->SetMinimum(0);
	174	fOutput->Add(fHistCtsLSneg);
	175
a27a5626	176	fHistCPtaD0 = new TH1F("fHistCPtaD0", "D0 cosine of pointing angle; Cos#Theta_{point}; Entries",200,0,1.);
17e8df02	177	fHistCPtaD0->Sumw2();
	178	fHistCPtaD0->SetMinimum(0);
	179	fOutput->Add(fHistCPtaD0);
	180
a27a5626	181	fHistCPtaLS = new TH1F("fHistCPtaLS", "Like sign pairs cosine of pointing angle; Cos#Theta_{point}; Entries",200,0,1.);
17e8df02	182	fHistCPtaLS->Sumw2();
	183	fHistCPtaLS->SetMinimum(0);
	184	fOutput->Add(fHistCPtaLS);
	185
	186	fHistd0d0D0 = new TH1F("fHistd0d0D0", "D0 product of impact parameters; d0xd0 [#mu m^{2}]; Entries",200,-100000.,100000.);
	187	fHistd0d0D0->Sumw2();
	188	fHistd0d0D0->SetMinimum(0);
	189	fOutput->Add(fHistd0d0D0);
	190
	191	fHistd0d0LS = new TH1F("fHistd0d0LS", "Like sign pairs product of impact parameters; d0xd0 [#mu m^{2}]; Entries",200,-100000.,100000.);
	192	fHistd0d0LS->Sumw2();
	193	fHistd0d0LS->SetMinimum(0);
	194	fOutput->Add(fHistd0d0LS);
	195
	196	fHistDCAD0 = new TH1F("fHistDCAD0", "D0 distance of closest approach; dca [10^{2}#mu m]; Entries",100,0.,5.);
	197	fHistDCAD0->Sumw2();
	198	fHistDCAD0->SetMinimum(0);
	199	fOutput->Add(fHistDCAD0);
	200
	201	fHistDCALS = new TH1F("fHistDCALS", "Like sign pairs distance of closest approach; dca [10^{2}#mu m]; Entries",100,0.,5.);
	202	fHistDCALS->Sumw2();
	203	fHistDCALS->SetMinimum(0);
	204	fOutput->Add(fHistDCALS);
	205
a27a5626	206	fNentries=new TH1F("nentriesLS", "Look at the number of entries! it is = to the number of AODs", 2,1.,2.);
a27a5626	207
17e8df02	208	return;
	209	}
	210
	211	//________________________________________________________________________
	212	void AliAnalysisTaskSEBkgLikeSignD0::UserExec(Option_t /option*/)
	213	{
	214	// Execute analysis for current event:
	215	// heavy flavor candidates association to MC truth
	216
	217	AliAODEvent aod = dynamic_cast<AliAODEvent> (InputEvent());
	218
8931c313	219	// In case there is an AOD handler writing a standard AOD, use the AOD
	220	// event in memory rather than the input (ESD) event.
	221	if (!aod && AODEvent() && IsStandardAOD()) aod = dynamic_cast<AliAODEvent*> (AODEvent());
	222
17e8df02	223	// load heavy flavour vertices
	224	TClonesArray *arrayVerticesHF =
	225	(TClonesArray*)aod->GetList()->FindObject("VerticesHF");
	226	if(!arrayVerticesHF) {
	227	printf("AliAnalysisTaskSEBkgLikeSignD0::UserExec: VerticesHF branch not found!\n");
	228	return;
	229	}
	230
	231	// load D0->ee candidates
	232	TClonesArray *arrayD0toKpi =
	233	(TClonesArray*)aod->GetList()->FindObject("D0toKpi");
	234	if(!arrayD0toKpi) {
	235	printf("AliAnalysisTaskSEBkgLikeSignD0::UserExec: D0toKpi branch not found!\n");
	236	return;
	237	}
	238
	239	// load like sign candidates
	240	TClonesArray *arrayLikeSign =
	241	(TClonesArray*)aod->GetList()->FindObject("LikeSign2Prong");
	242	if(!arrayLikeSign) {
	243	printf("AliAnalysisTaskSEBkgLikeSignD0::UserExec: LikeSign2Prong branch not found!\n");
	244	return;
	245	}
	246
	247	// AOD primary vertex
	248	AliAODVertex vtx1 = (AliAODVertex)aod->GetPrimaryVertex();
	249
	250	// make trkIDtoEntry register (temporary)
	251	Int_t trkIDtoEntry[100000];
	252	for(Int_t it=0;it<aod->GetNumberOfTracks();it++) {
	253	AliAODTrack *track = aod->GetTrack(it);
	254	trkIDtoEntry[track->GetID()]=it;
	255	}
	256
a27a5626	257	//histogram filled with 1 for every AOD
	258	fNentries->Fill(1);
	259	PostData(2,fNentries);
	260
17e8df02	261	// loop over Like sign candidates
	262	Int_t nPosPairs=0,nNegPairs=0;
	263	Int_t nLikeSign = arrayLikeSign->GetEntriesFast();
3b1598da	264	if(fDebug>1) printf("+++\n+++Number of like sign pairs ---> %d \n+++\n", nLikeSign);
17e8df02	265
	266	for(Int_t iLikeSign = 0; iLikeSign < nLikeSign; iLikeSign++) {
	267	AliAODRecoDecayHF2Prong d = (AliAODRecoDecayHF2Prong)arrayLikeSign->UncheckedAt(iLikeSign);
	268	Bool_t unsetvtx=kFALSE;
	269	if(!d->GetOwnPrimaryVtx()) {
	270	d->SetOwnPrimaryVtx(vtx1); // needed to compute all variables
	271	unsetvtx=kTRUE;
	272	}
	273	Int_t okD0ls=0; Int_t okD0barls=0;
	274	if(d->SelectD0(fVHF->GetD0toKpiCuts(),okD0ls,okD0barls)) {
17e8df02	275	AliAODTrack trk0 = (AliAODTrack)d->GetDaughter(0);
1fd36d27	276	AliAODTrack trk1 = (AliAODTrack)d->GetDaughter(1);
1fd36d27	277	if(!trk0 \|\| !trk1) {
17e8df02	278	trk0=aod->GetTrack(trkIDtoEntry[d->GetProngID(0)]);
1fd36d27	279	trk1=aod->GetTrack(trkIDtoEntry[d->GetProngID(1)]);
17e8df02	280	printf("references to standard AOD not available \n");
17e8df02	281	}
a27a5626	282	if(okD0ls) fHistMassLS->Fill(d->InvMassD0());
a27a5626	283	if(okD0barls) fHistMassLS->Fill(d->InvMassD0bar());
1fd36d27	284	fHistCPtaLS->Fill(d->CosPointingAngle());
1fd36d27	285	fHistd0d0LS->Fill(1e8*d->Prodd0d0());
a27a5626	286	if(okD0ls) fHistCtsLS->Fill(d->CosThetaStarD0());
a27a5626	287	if(okD0barls) fHistCtsLS->Fill(d->CosThetaStarD0bar());
1fd36d27	288	fHistDCALS->Fill(100*d->GetDCA());
1fd36d27	289	//PostData(1,fOutput);
17e8df02	290	if((trk0->Charge())==1) {
	291	nPosPairs++;
	292	fHistCtsLSpos->Fill(d->CosThetaStarD0());
1fd36d27	293	//PostData(1,fOutput);
17e8df02	294	} else {
	295	nNegPairs++;
	296	fHistCtsLSneg->Fill(d->CosThetaStarD0());
1fd36d27	297	//PostData(1,fOutput);
17e8df02	298	}
	299	PostData(1,fOutput);
	300	}
	301	if(unsetvtx) d->UnsetOwnPrimaryVtx();
	302	}
	303
3b1598da	304	if(fDebug>1) printf("------------ N. of positive pairs in Event ----- %d \n", nPosPairs);
3b1598da	305	if(fDebug>1) printf("------------ N. of negative pairs in Event ----- %d \n", nNegPairs);
17e8df02	306
	307	fTotPosPairs += nPosPairs;
	308	fTotNegPairs += nNegPairs;
	309
	310	// loop over D0 candidates
	311	Int_t nD0toKpi = arrayD0toKpi->GetEntriesFast();
3b1598da	312	if(fDebug>1) printf("Number of like D0 -> Kpi candidates ---> %d \n", nD0toKpi);
17e8df02	313
	314	for (Int_t iD0toKpi = 0; iD0toKpi < nD0toKpi; iD0toKpi++) {
	315	AliAODRecoDecayHF2Prong d = (AliAODRecoDecayHF2Prong)arrayD0toKpi->UncheckedAt(iD0toKpi);
	316	Bool_t unsetvtx=kFALSE;
	317	if(!d->GetOwnPrimaryVtx()) {
	318	d->SetOwnPrimaryVtx(vtx1); // needed to compute all variables
	319	unsetvtx=kTRUE;
	320	}
	321	Int_t okD0=0; Int_t okD0bar=0;
	322	if(d->SelectD0(fVHF->GetD0toKpiCuts(),okD0,okD0bar)) {
a27a5626	323	fHistMassD0->Fill(d->InvMassD0());
	324	fHistMassD0->Fill(d->InvMassD0bar());
	325	fHistCtsD0->Fill(d->CosThetaStarD0());
	326	fHistCtsD0->Fill(d->CosThetaStarD0bar());
17e8df02	327	fHistd0d0D0->Fill(1e8*d->Prodd0d0());
	328	fHistCPtaD0->Fill(d->CosPointingAngle());
	329	fHistDCAD0->Fill(100*d->GetDCA());
	330	PostData(1,fOutput);
	331	}
	332	if(unsetvtx) d->UnsetOwnPrimaryVtx();
	333	}
	334
	335	return;
	336	}
	337
	338	//________________________________________________________________________
	339	void AliAnalysisTaskSEBkgLikeSignD0::Terminate(Option_t /option*/)
	340	{
	341	// Terminate analysis
	342	//
	343	if(fDebug > 1) printf("AnalysisTaskSEBkgLikeSignD0: Terminate() \n");
	344
	345	fOutput = dynamic_cast<TList*> (GetOutputData(1));
	346	if (!fOutput) {
	347	printf("ERROR: fOutput not available\n");
	348	return;
	349	}
	350
	351	fLsNormalization = 2.TMath::Sqrt(fTotPosPairsfTotNegPairs);
	352
1fd36d27	353	fHistMassD0 = dynamic_cast<TH1F*>(fOutput->FindObject("fHistMassD0"));
	354	fHistMassLS = dynamic_cast<TH1F*>(fOutput->FindObject("fHistMassLS"));
	355	fHistCtsD0 = dynamic_cast<TH1F*>(fOutput->FindObject("fHistCtsD0"));
	356	fHistCtsLS = dynamic_cast<TH1F*>(fOutput->FindObject("fHistCtsLS"));
17e8df02	357	fHistCtsLSpos = dynamic_cast<TH1F*>(fOutput->FindObject("fHistCtsLSpos"));
17e8df02	358	fHistCtsLSneg = dynamic_cast<TH1F*>(fOutput->FindObject("fHistCtsLSneg"));
1fd36d27	359	fHistCPtaD0 = dynamic_cast<TH1F*>(fOutput->FindObject("fHistCPtaD0"));
	360	fHistCPtaLS = dynamic_cast<TH1F*>(fOutput->FindObject("fHistCPtaLS"));
	361	fHistd0d0D0 = dynamic_cast<TH1F*>(fOutput->FindObject("fHistd0d0D0"));
	362	fHistd0d0LS = dynamic_cast<TH1F*>(fOutput->FindObject("fHistd0d0LS"));
	363	fHistDCAD0 = dynamic_cast<TH1F*>(fOutput->FindObject("fHistDCAD0"));
	364	fHistDCALS = dynamic_cast<TH1F*>(fOutput->FindObject("fHistDCALS"));
17e8df02	365
	366	if(fLsNormalization>0) {
	367	fHistMassLS->Scale((1/fLsNormalization)*fHistMassLS->GetEntries());
	368	fHistCtsLS->Scale((1/fLsNormalization)*fHistCtsLS->GetEntries());
	369	fHistCtsLSpos->Scale((1/fLsNormalization)*fHistCtsLSpos->GetEntries());
	370	fHistCtsLSneg->Scale((1/fLsNormalization)*fHistCtsLSneg->GetEntries());
	371	fHistCPtaLS->Scale((1/fLsNormalization)*fHistCPtaLS->GetEntries());
	372	fHistd0d0LS->Scale((1/fLsNormalization)*fHistd0d0LS->GetEntries());
	373	fHistDCALS->Scale((1/fLsNormalization)*fHistDCALS->GetEntries());
	374	}
	375
	376	return;
	377	}