[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 "AliAnalysisManager.h"
#include "AliAODHandler.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());

  TClonesArray *arrayD0toKpi = 0;
  TClonesArray *arrayLikeSign = 0;

  if(!aod && AODEvent() && IsStandardAOD()) {
    // In case there is an AOD handler writing a standard AOD, use the AOD 
    // event in memory rather than the input (ESD) event.    
    aod = dynamic_cast<AliAODEvent*> (AODEvent());
    // in this case the braches in the deltaAOD (AliAOD.VertexingHF.root)
    // have to taken from the AOD event hold by the AliAODExtension
    AliAODHandler* aodHandler = (AliAODHandler*) 
      ((AliAnalysisManager::GetAnalysisManager())->GetOutputEventHandler());
    if(aodHandler->GetExtensions()) {
      AliAODExtension *ext = (AliAODExtension*)aodHandler->GetExtensions()->FindObject("AliAOD.VertexingHF.root");
      AliAODEvent *aodFromExt = ext->GetAOD();
      // load D0 candidates                                                   
      arrayD0toKpi=(TClonesArray*)aodFromExt->GetList()->FindObject("D0toKpi");
      // load like sign candidates
      arrayLikeSign=(TClonesArray*)aodFromExt->GetList()->FindObject("LikeSign2Prong");
    }
  } else {
    // load D0 candidates                                                   
    arrayD0toKpi=(TClonesArray*)aod->GetList()->FindObject("D0toKpi");
    // load like sign candidates
    arrayLikeSign=(TClonesArray*)aod->GetList()->FindObject("LikeSign2Prong");
  }


  if(!arrayD0toKpi) {
    printf("AliAnalysisTaskSEBkgLikeSignD0::UserExec: D0toKpi branch not found!\n");
    return;
  }
  if(!arrayLikeSign) {
    printf("AliAnalysisTaskSEBkgLikeSignD0::UserExec: LikeSign2Prong branch not found!\n");
    return;
  }

  // fix for temporary bug in ESDfilter 
  // the AODs with null vertex pointer didn't pass the PhysSel
  if(!aod->GetPrimaryVertex()) 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
b557eb43	30	#include "AliAnalysisManager.h"
b557eb43	31	#include "AliAODHandler.h"
17e8df02	32	#include "AliAODEvent.h"
	33	#include "AliAODVertex.h"
	34	#include "AliAODTrack.h"
	35	#include "AliAODRecoDecayHF2Prong.h"
	36	#include "AliAnalysisVertexingHF.h"
	37	#include "AliAnalysisTaskSE.h"
	38	#include "AliAnalysisTaskSEBkgLikeSignD0.h"
	39
	40	ClassImp(AliAnalysisTaskSEBkgLikeSignD0)
	41
	42	//________________________________________________________________________
	43	AliAnalysisTaskSEBkgLikeSignD0::AliAnalysisTaskSEBkgLikeSignD0():
	44	AliAnalysisTaskSE(),
	45	fOutput(0),
	46	fHistMassD0(0),
	47	fHistMassLS(0),
	48	fHistCtsD0(0),
	49	fHistCtsLS(0),
	50	fHistCtsLSpos(0),
	51	fHistCtsLSneg(0),
	52	fHistCPtaD0(0),
	53	fHistCPtaLS(0),
	54	fHistd0d0D0(0),
	55	fHistd0d0LS(0),
	56	fHistDCAD0(0),
	57	fHistDCALS(0),
	58	fVHF(0),
2cc87fa1	59	fNentries(0),
17e8df02	60	fTotPosPairs(0),
	61	fTotNegPairs(0),
	62	fLsNormalization(1.)
	63	{
	64	//
	65	// Default constructor
	66	//
	67	}
	68
	69	//________________________________________________________________________
	70	AliAnalysisTaskSEBkgLikeSignD0::AliAnalysisTaskSEBkgLikeSignD0(const char *name):
	71	AliAnalysisTaskSE(name),
	72	fOutput(0),
	73	fHistMassD0(0),
	74	fHistMassLS(0),
	75	fHistCtsD0(0),
	76	fHistCtsLS(0),
	77	fHistCtsLSpos(0),
	78	fHistCtsLSneg(0),
	79	fHistCPtaD0(0),
	80	fHistCPtaLS(0),
	81	fHistd0d0D0(0),
	82	fHistd0d0LS(0),
	83	fHistDCAD0(0),
	84	fHistDCALS(0),
	85	fVHF(0),
2cc87fa1	86	fNentries(0),
17e8df02	87	fTotPosPairs(0),
	88	fTotNegPairs(0),
	89	fLsNormalization(1.)
	90	{
	91	//
	92	// Standard constructor
	93	//
	94	// Output slot #1 writes into a TList container
	95	DefineOutput(1,TList::Class()); //My private output
a27a5626	96	// Output slot #2 writes into a TH1F container
	97	DefineOutput(2,TH1F::Class()); //My private output
	98
17e8df02	99	}
	100
	101	//________________________________________________________________________
	102	AliAnalysisTaskSEBkgLikeSignD0::~AliAnalysisTaskSEBkgLikeSignD0()
	103	{
	104	// Destructor
	105	if (fOutput) {
	106	delete fOutput;
	107	fOutput = 0;
	108	}
	109
	110	if (fVHF) {
	111	delete fVHF;
	112	fVHF = 0;
	113	}
	114
a27a5626	115	if (fNentries){
	116	delete fNentries;
	117	fNentries = 0;
	118	}
	119
17e8df02	120	}
	121	//________________________________________________________________________
	122	void AliAnalysisTaskSEBkgLikeSignD0::Init()
	123	{
	124	// Initialization
	125
	126	if(fDebug > 1) printf("AnalysisTaskSEBkgLikeSignD0::Init() \n");
	127
	128	gROOT->LoadMacro("ConfigVertexingHF.C");
	129
	130	fVHF = (AliAnalysisVertexingHF*)gROOT->ProcessLine("ConfigVertexingHF()");
a27a5626	131	fVHF->SetD0toKpiCuts(0.7,0.02,0.8,0.7,0.7,1,1,-0.00025,0.8);
17e8df02	132	fVHF->PrintStatus();
	133
	134	return;
	135	}
	136
	137	//________________________________________________________________________
	138	void AliAnalysisTaskSEBkgLikeSignD0::UserCreateOutputObjects()
	139	{
	140	// Create the output container
	141	//
	142	if(fDebug > 1) printf("AnalysisTaskSEBkgLikeSignD0::UserCreateOutputObjects() \n");
	143
	144	// Several histograms are more conveniently managed in a TList
	145	fOutput = new TList();
	146	fOutput->SetOwner();
	147
a27a5626	148	fHistMassD0 = new TH1F("fHistMassD0", "D0 invariant mass; M [GeV]; Entries",200,1.765,1.965);
17e8df02	149	fHistMassD0->Sumw2();
	150	fHistMassD0->SetMinimum(0);
	151	fOutput->Add(fHistMassD0);
	152
a27a5626	153	fHistMassLS = new TH1F("fHistMassLS", "Like sign pairs invariant mass; M [GeV]; Entries",200,1.765,1.965);
17e8df02	154	fHistMassLS->Sumw2();
	155	fHistMassLS->SetMinimum(0);
	156	fOutput->Add(fHistMassLS);
	157
	158	fHistCtsD0 = new TH1F("fHistCtsD0", "D0 cosine of decay angle; Cos#Theta*; Entries",200,-1.,1.);
	159	fHistCtsD0->Sumw2();
	160	fHistCtsD0->SetMinimum(0);
	161	fOutput->Add(fHistCtsD0);
	162
	163	fHistCtsLS = new TH1F("fHistCtsLS", "Like sign pairs cosine of decay angle; Cos#Theta*; Entries",200,-1.,1.);
	164	fHistCtsLS->Sumw2();
	165	fHistCtsLS->SetMinimum(0);
	166	fOutput->Add(fHistCtsLS);
	167
	168	fHistCtsLSpos = new TH1F("fHistCtsLSpos", "Like sign ++ pairs cosine of decay angle; Cos#Theta*; Entries",200,-1.,1.);
	169	fHistCtsLSpos->Sumw2();
	170	fHistCtsLSpos->SetMinimum(0);
	171	fOutput->Add(fHistCtsLSpos);
	172
	173	fHistCtsLSneg = new TH1F("fHistCtsLSneg", "Like sign -- pairs cosine of decay angle; Cos#Theta*; Entries",200,-1.,1.);
	174	fHistCtsLSneg->Sumw2();
	175	fHistCtsLSneg->SetMinimum(0);
	176	fOutput->Add(fHistCtsLSneg);
	177
a27a5626	178	fHistCPtaD0 = new TH1F("fHistCPtaD0", "D0 cosine of pointing angle; Cos#Theta_{point}; Entries",200,0,1.);
17e8df02	179	fHistCPtaD0->Sumw2();
	180	fHistCPtaD0->SetMinimum(0);
	181	fOutput->Add(fHistCPtaD0);
	182
a27a5626	183	fHistCPtaLS = new TH1F("fHistCPtaLS", "Like sign pairs cosine of pointing angle; Cos#Theta_{point}; Entries",200,0,1.);
17e8df02	184	fHistCPtaLS->Sumw2();
	185	fHistCPtaLS->SetMinimum(0);
	186	fOutput->Add(fHistCPtaLS);
	187
	188	fHistd0d0D0 = new TH1F("fHistd0d0D0", "D0 product of impact parameters; d0xd0 [#mu m^{2}]; Entries",200,-100000.,100000.);
	189	fHistd0d0D0->Sumw2();
	190	fHistd0d0D0->SetMinimum(0);
	191	fOutput->Add(fHistd0d0D0);
	192
	193	fHistd0d0LS = new TH1F("fHistd0d0LS", "Like sign pairs product of impact parameters; d0xd0 [#mu m^{2}]; Entries",200,-100000.,100000.);
	194	fHistd0d0LS->Sumw2();
	195	fHistd0d0LS->SetMinimum(0);
	196	fOutput->Add(fHistd0d0LS);
	197
	198	fHistDCAD0 = new TH1F("fHistDCAD0", "D0 distance of closest approach; dca [10^{2}#mu m]; Entries",100,0.,5.);
	199	fHistDCAD0->Sumw2();
	200	fHistDCAD0->SetMinimum(0);
	201	fOutput->Add(fHistDCAD0);
	202
	203	fHistDCALS = new TH1F("fHistDCALS", "Like sign pairs distance of closest approach; dca [10^{2}#mu m]; Entries",100,0.,5.);
	204	fHistDCALS->Sumw2();
	205	fHistDCALS->SetMinimum(0);
	206	fOutput->Add(fHistDCALS);
	207
a27a5626	208	fNentries=new TH1F("nentriesLS", "Look at the number of entries! it is = to the number of AODs", 2,1.,2.);
a27a5626	209
17e8df02	210	return;
	211	}
	212
	213	//________________________________________________________________________
	214	void AliAnalysisTaskSEBkgLikeSignD0::UserExec(Option_t /option*/)
	215	{
	216	// Execute analysis for current event:
	217	// heavy flavor candidates association to MC truth
	218
	219	AliAODEvent aod = dynamic_cast<AliAODEvent> (InputEvent());
	220
b557eb43	221	TClonesArray *arrayD0toKpi = 0;
	222	TClonesArray *arrayLikeSign = 0;
	223
	224	if(!aod && AODEvent() && IsStandardAOD()) {
	225	// In case there is an AOD handler writing a standard AOD, use the AOD
	226	// event in memory rather than the input (ESD) event.
	227	aod = dynamic_cast<AliAODEvent*> (AODEvent());
	228	// in this case the braches in the deltaAOD (AliAOD.VertexingHF.root)
	229	// have to taken from the AOD event hold by the AliAODExtension
	230	AliAODHandler* aodHandler = (AliAODHandler*)
	231	((AliAnalysisManager::GetAnalysisManager())->GetOutputEventHandler());
	232	if(aodHandler->GetExtensions()) {
	233	AliAODExtension ext = (AliAODExtension)aodHandler->GetExtensions()->FindObject("AliAOD.VertexingHF.root");
	234	AliAODEvent *aodFromExt = ext->GetAOD();
	235	// load D0 candidates
	236	arrayD0toKpi=(TClonesArray*)aodFromExt->GetList()->FindObject("D0toKpi");
	237	// load like sign candidates
	238	arrayLikeSign=(TClonesArray*)aodFromExt->GetList()->FindObject("LikeSign2Prong");
	239	}
	240	} else {
	241	// load D0 candidates
	242	arrayD0toKpi=(TClonesArray*)aod->GetList()->FindObject("D0toKpi");
	243	// load like sign candidates
	244	arrayLikeSign=(TClonesArray*)aod->GetList()->FindObject("LikeSign2Prong");
17e8df02	245	}
17e8df02	246
b557eb43	247
17e8df02	248	if(!arrayD0toKpi) {
	249	printf("AliAnalysisTaskSEBkgLikeSignD0::UserExec: D0toKpi branch not found!\n");
	250	return;
	251	}
17e8df02	252	if(!arrayLikeSign) {
	253	printf("AliAnalysisTaskSEBkgLikeSignD0::UserExec: LikeSign2Prong branch not found!\n");
	254	return;
	255	}
	256
7c23877d	257	// fix for temporary bug in ESDfilter
	258	// the AODs with null vertex pointer didn't pass the PhysSel
	259	if(!aod->GetPrimaryVertex()) return;
	260
	261
17e8df02	262	// AOD primary vertex
	263	AliAODVertex vtx1 = (AliAODVertex)aod->GetPrimaryVertex();
	264
	265	// make trkIDtoEntry register (temporary)
	266	Int_t trkIDtoEntry[100000];
	267	for(Int_t it=0;it<aod->GetNumberOfTracks();it++) {
	268	AliAODTrack *track = aod->GetTrack(it);
	269	trkIDtoEntry[track->GetID()]=it;
	270	}
	271
a27a5626	272	//histogram filled with 1 for every AOD
	273	fNentries->Fill(1);
	274	PostData(2,fNentries);
	275
17e8df02	276	// loop over Like sign candidates
	277	Int_t nPosPairs=0,nNegPairs=0;
	278	Int_t nLikeSign = arrayLikeSign->GetEntriesFast();
3b1598da	279	if(fDebug>1) printf("+++\n+++Number of like sign pairs ---> %d \n+++\n", nLikeSign);
17e8df02	280
	281	for(Int_t iLikeSign = 0; iLikeSign < nLikeSign; iLikeSign++) {
	282	AliAODRecoDecayHF2Prong d = (AliAODRecoDecayHF2Prong)arrayLikeSign->UncheckedAt(iLikeSign);
	283	Bool_t unsetvtx=kFALSE;
	284	if(!d->GetOwnPrimaryVtx()) {
	285	d->SetOwnPrimaryVtx(vtx1); // needed to compute all variables
	286	unsetvtx=kTRUE;
	287	}
	288	Int_t okD0ls=0; Int_t okD0barls=0;
	289	if(d->SelectD0(fVHF->GetD0toKpiCuts(),okD0ls,okD0barls)) {
17e8df02	290	AliAODTrack trk0 = (AliAODTrack)d->GetDaughter(0);
1fd36d27	291	AliAODTrack trk1 = (AliAODTrack)d->GetDaughter(1);
1fd36d27	292	if(!trk0 \|\| !trk1) {
17e8df02	293	trk0=aod->GetTrack(trkIDtoEntry[d->GetProngID(0)]);
1fd36d27	294	trk1=aod->GetTrack(trkIDtoEntry[d->GetProngID(1)]);
17e8df02	295	printf("references to standard AOD not available \n");
17e8df02	296	}
a27a5626	297	if(okD0ls) fHistMassLS->Fill(d->InvMassD0());
a27a5626	298	if(okD0barls) fHistMassLS->Fill(d->InvMassD0bar());
1fd36d27	299	fHistCPtaLS->Fill(d->CosPointingAngle());
1fd36d27	300	fHistd0d0LS->Fill(1e8*d->Prodd0d0());
a27a5626	301	if(okD0ls) fHistCtsLS->Fill(d->CosThetaStarD0());
a27a5626	302	if(okD0barls) fHistCtsLS->Fill(d->CosThetaStarD0bar());
1fd36d27	303	fHistDCALS->Fill(100*d->GetDCA());
1fd36d27	304	//PostData(1,fOutput);
17e8df02	305	if((trk0->Charge())==1) {
	306	nPosPairs++;
	307	fHistCtsLSpos->Fill(d->CosThetaStarD0());
1fd36d27	308	//PostData(1,fOutput);
17e8df02	309	} else {
	310	nNegPairs++;
	311	fHistCtsLSneg->Fill(d->CosThetaStarD0());
1fd36d27	312	//PostData(1,fOutput);
17e8df02	313	}
	314	PostData(1,fOutput);
	315	}
	316	if(unsetvtx) d->UnsetOwnPrimaryVtx();
	317	}
	318
3b1598da	319	if(fDebug>1) printf("------------ N. of positive pairs in Event ----- %d \n", nPosPairs);
3b1598da	320	if(fDebug>1) printf("------------ N. of negative pairs in Event ----- %d \n", nNegPairs);
17e8df02	321
	322	fTotPosPairs += nPosPairs;
	323	fTotNegPairs += nNegPairs;
	324
	325	// loop over D0 candidates
	326	Int_t nD0toKpi = arrayD0toKpi->GetEntriesFast();
3b1598da	327	if(fDebug>1) printf("Number of like D0 -> Kpi candidates ---> %d \n", nD0toKpi);
17e8df02	328
	329	for (Int_t iD0toKpi = 0; iD0toKpi < nD0toKpi; iD0toKpi++) {
	330	AliAODRecoDecayHF2Prong d = (AliAODRecoDecayHF2Prong)arrayD0toKpi->UncheckedAt(iD0toKpi);
	331	Bool_t unsetvtx=kFALSE;
	332	if(!d->GetOwnPrimaryVtx()) {
	333	d->SetOwnPrimaryVtx(vtx1); // needed to compute all variables
	334	unsetvtx=kTRUE;
	335	}
	336	Int_t okD0=0; Int_t okD0bar=0;
	337	if(d->SelectD0(fVHF->GetD0toKpiCuts(),okD0,okD0bar)) {
a27a5626	338	fHistMassD0->Fill(d->InvMassD0());
	339	fHistMassD0->Fill(d->InvMassD0bar());
	340	fHistCtsD0->Fill(d->CosThetaStarD0());
	341	fHistCtsD0->Fill(d->CosThetaStarD0bar());
17e8df02	342	fHistd0d0D0->Fill(1e8*d->Prodd0d0());
	343	fHistCPtaD0->Fill(d->CosPointingAngle());
	344	fHistDCAD0->Fill(100*d->GetDCA());
	345	PostData(1,fOutput);
	346	}
	347	if(unsetvtx) d->UnsetOwnPrimaryVtx();
	348	}
	349
	350	return;
	351	}
	352
	353	//________________________________________________________________________
	354	void AliAnalysisTaskSEBkgLikeSignD0::Terminate(Option_t /option*/)
	355	{
	356	// Terminate analysis
	357	//
	358	if(fDebug > 1) printf("AnalysisTaskSEBkgLikeSignD0: Terminate() \n");
	359
	360	fOutput = dynamic_cast<TList*> (GetOutputData(1));
	361	if (!fOutput) {
	362	printf("ERROR: fOutput not available\n");
	363	return;
	364	}
	365
	366	fLsNormalization = 2.TMath::Sqrt(fTotPosPairsfTotNegPairs);
	367
1fd36d27	368	fHistMassD0 = dynamic_cast<TH1F*>(fOutput->FindObject("fHistMassD0"));
	369	fHistMassLS = dynamic_cast<TH1F*>(fOutput->FindObject("fHistMassLS"));
	370	fHistCtsD0 = dynamic_cast<TH1F*>(fOutput->FindObject("fHistCtsD0"));
	371	fHistCtsLS = dynamic_cast<TH1F*>(fOutput->FindObject("fHistCtsLS"));
17e8df02	372	fHistCtsLSpos = dynamic_cast<TH1F*>(fOutput->FindObject("fHistCtsLSpos"));
17e8df02	373	fHistCtsLSneg = dynamic_cast<TH1F*>(fOutput->FindObject("fHistCtsLSneg"));
1fd36d27	374	fHistCPtaD0 = dynamic_cast<TH1F*>(fOutput->FindObject("fHistCPtaD0"));
	375	fHistCPtaLS = dynamic_cast<TH1F*>(fOutput->FindObject("fHistCPtaLS"));
	376	fHistd0d0D0 = dynamic_cast<TH1F*>(fOutput->FindObject("fHistd0d0D0"));
	377	fHistd0d0LS = dynamic_cast<TH1F*>(fOutput->FindObject("fHistd0d0LS"));
	378	fHistDCAD0 = dynamic_cast<TH1F*>(fOutput->FindObject("fHistDCAD0"));
	379	fHistDCALS = dynamic_cast<TH1F*>(fOutput->FindObject("fHistDCALS"));
17e8df02	380
	381	if(fLsNormalization>0) {
	382	fHistMassLS->Scale((1/fLsNormalization)*fHistMassLS->GetEntries());
	383	fHistCtsLS->Scale((1/fLsNormalization)*fHistCtsLS->GetEntries());
	384	fHistCtsLSpos->Scale((1/fLsNormalization)*fHistCtsLSpos->GetEntries());
	385	fHistCtsLSneg->Scale((1/fLsNormalization)*fHistCtsLSneg->GetEntries());
	386	fHistCPtaLS->Scale((1/fLsNormalization)*fHistCPtaLS->GetEntries());
	387	fHistd0d0LS->Scale((1/fLsNormalization)*fHistd0d0LS->GetEntries());
	388	fHistDCALS->Scale((1/fLsNormalization)*fHistDCALS->GetEntries());
	389	}
	390
	391	return;
	392	}