[u/mrichter/AliRoot.git] / PWG3 / hfe / AliHFEpriVtx.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.                  *
 **************************************************************************/
//
//  QA class of primary vertex study for Heavy Flavor electrons
//
// Authors:
//   MinJung Kweon <minjung@physi.uni-heidelberg.de>
//


#include <TH2F.h>
#include <TParticle.h>

#include "AliESDEvent.h"
#include <AliESDtrack.h>
#include <AliStack.h>

#include <AliLog.h>
#include <AliKFParticle.h>
#include <AliKFVertex.h>

#include "AliHFEpriVtx.h"


ClassImp(AliHFEpriVtx)

//_______________________________________________________________________________________________
AliHFEpriVtx::AliHFEpriVtx():
        fESD1(0x0)
        ,fStack(0x0)
        ,fNtrackswoPid(0)
        ,fHNtrackswoPid(0x0)
        ,fNESDprimVtxContributor(0x0)
        ,fNESDprimVtxIndices(0x0)
        ,fDiffDCAvsPt(0x0)
        ,fDiffDCAvsNt(0x0)
{ 
        //
        // Default constructor
        //

        Init();

}

//_______________________________________________________________________________________________
AliHFEpriVtx::AliHFEpriVtx(const AliHFEpriVtx &p):
         TObject(p)
        ,fESD1(0x0)
        ,fStack(0x0)
        ,fNtrackswoPid(p.fNtrackswoPid)
        ,fHNtrackswoPid(0x0)
        ,fNESDprimVtxContributor(0x0)
        ,fNESDprimVtxIndices(0x0)
        ,fDiffDCAvsPt(0x0)
        ,fDiffDCAvsNt(0x0)
{
        //
        // Copy constructor
        //
}

//_______________________________________________________________________________________________
AliHFEpriVtx&
AliHFEpriVtx::operator=(const AliHFEpriVtx &)
{
        //
        // Assignment operator
        //

        AliInfo("Not yet implemented.");
        return *this;
}

//_______________________________________________________________________________________________
AliHFEpriVtx::~AliHFEpriVtx()
{
        //
        // Destructor
        //

        AliInfo("Analysis Done.");
}

//__________________________________________
void AliHFEpriVtx::Init()
{
        //
        // initialize counters
        //

        fNtrackswoPid = 0;
        for (int i=0; i<10; i++){       
                fPrimVtx[i].fNtrackCount = 0 ;
                fPrimVtx[i].fNprimVtxContributorCount = 0 ;
        }
}

//_______________________________________________________________________________________________
void AliHFEpriVtx::CreateHistograms(TString hnopt)
{ 
        //
        // create histograms
        //

        fkSourceLabel[kAll]="all";
        fkSourceLabel[kDirectCharm]="directCharm";
        fkSourceLabel[kDirectBeauty]="directBeauty";
        fkSourceLabel[kBeautyCharm]="beauty2charm";
        fkSourceLabel[kGamma]="gamma";
        fkSourceLabel[kPi0]="pi0";
        fkSourceLabel[kElse]="others";
        fkSourceLabel[kBeautyGamma]="beauty22gamma";
        fkSourceLabel[kBeautyPi0]="beauty22pi0";
        fkSourceLabel[kBeautyElse]="beauty22others";


        TString hname;
        for (Int_t isource = 0; isource < 10; isource++ ){

           hname=hnopt+"ntracks_"+fkSourceLabel[isource];
           fPrimVtx[isource].fNtracks = new TH1F(hname,hname,50,0,50);
           hname=hnopt+"nPrimVtxContributor_"+fkSourceLabel[isource];
           fPrimVtx[isource].fNprimVtxContributor = new TH1F(hname,hname,100,0,100);
           hname=hnopt+"PtElec_"+fkSourceLabel[isource];
           fPrimVtx[isource].fPtElec = new TH1F(hname,hname,250,0,50);
           hname=hnopt+"PtElecContributor_"+fkSourceLabel[isource];
           fPrimVtx[isource].fPtElecContributor = new TH1F(hname,hname,250,0,50);

        }

        hname=hnopt+"ntrackswopid";
        fHNtrackswoPid = new TH1F(hname,hname,50,0,50);
        hname=hnopt+"nESDprimVtxContributor";
        fNESDprimVtxContributor = new TH1I(hname,hname,100,0,100);
        hname=hnopt+"nESDprimVtxIndices";
        fNESDprimVtxIndices= new TH1I(hname,hname,100,0,100);
        hname=hnopt+"diffDCAvsPt";
        fDiffDCAvsPt = new TH2F(hname,hname,250,0,50,500,0,1);
        hname=hnopt+"diffDCAvsNt";
        fDiffDCAvsNt = new TH2F(hname,hname,100,0,100,500,0,1);

}

//_______________________________________________________________________________________________
void AliHFEpriVtx::CountNtracks(Int_t sourcePart, Int_t recpid, Double_t recprob)
{
        //
        // count number of tracks passed certain cuts
        //

        fNtrackswoPid++;

        if (!recpid && recprob>0.5)     
        fPrimVtx[kAll].fNtrackCount++;
        if(sourcePart<0) return;
        fPrimVtx[sourcePart].fNtrackCount++;

}

//_______________________________________________________________________________________________
void AliHFEpriVtx::FillNtracks()
{
        //
        // count number of tracks passed certain cuts
        //

        fHNtrackswoPid->Fill(fNtrackswoPid);
        for (int i=0; i<10; i++){
          fPrimVtx[i].fNtracks->Fill(fPrimVtx[i].fNtrackCount);
        }

}

//_______________________________________________________________________________________________
Int_t AliHFEpriVtx::GetMCPID(AliESDtrack *track) 
{
        //
        // get MC pid
        //

        Int_t label = TMath::Abs(track->GetLabel());
        TParticle* mcpart = fStack->Particle(label);
        if ( !mcpart ) return 0;
        Int_t pdgCode = mcpart->GetPdgCode();

        return pdgCode;
}

//_______________________________________________________________________________________________
void AliHFEpriVtx::GetNPriVxtContributor() 
{
        //
        // count number of primary vertex contributor
        //

        const AliESDVertex *primvtx = fESD1->GetPrimaryVertex();
        fNESDprimVtxContributor->Fill(primvtx->GetNContributors());
        fNESDprimVtxIndices->Fill(primvtx->GetNIndices());
}

//_______________________________________________________________________________________________
void AliHFEpriVtx::CountPriVxtElecContributor(AliESDtrack *ESDelectron, Int_t sourcePart, Int_t recpid, Double_t recprob) 
{
        //
        // count number of electrons contributing to the primary vertex
        //


        if (recpid || recprob<0.5) return;

        // get track id of our selected electron
        Int_t elecTrkID = ESDelectron->GetID();

        Int_t label = TMath::Abs(ESDelectron->GetLabel());
        TParticle* mcpart = fStack->Particle(label);

        AliKFParticle::SetField(fESD1->GetMagneticField());
        AliKFParticle kfElectron(*ESDelectron,11);
 
        // prepare kfprimary vertex
        AliKFVertex kfESDprimary;

        // Reconstructed Primary Vertex (with ESD tracks)
        const AliESDVertex *primvtx = fESD1->GetPrimaryVertex();
//         Int_t nt = primvtx->GetNContributors();
        Int_t n=primvtx->GetNIndices();

        if (n>0 && primvtx->GetStatus()){

                kfESDprimary = AliKFVertex(*primvtx);
                Double_t dcaBFrmElec = kfElectron.GetDistanceFromVertexXY(kfESDprimary);

                UShort_t *priIndex = primvtx->GetIndices();

                fPrimVtx[kAll].fPtElec->Fill(mcpart->Pt());
                if(sourcePart>=0) fPrimVtx[sourcePart].fPtElec->Fill(mcpart->Pt());

                for (Int_t i=0;i<n;i++){

                        Int_t idx = Int_t(priIndex[i]);
                        if (idx == elecTrkID){
                                fPrimVtx[kAll].fNprimVtxContributorCount++;
                                fPrimVtx[kAll].fPtElecContributor->Fill(mcpart->Pt());
                                if(sourcePart<0) continue;
                                fPrimVtx[sourcePart].fNprimVtxContributorCount++;
                                fPrimVtx[sourcePart].fPtElecContributor->Fill(mcpart->Pt());

                                kfESDprimary -= kfElectron;
                                Double_t dcaAFrmElec = kfElectron.GetDistanceFromVertexXY(kfESDprimary);
                                fDiffDCAvsPt->Fill(mcpart->Pt(),dcaBFrmElec-dcaAFrmElec);
                                fDiffDCAvsNt->Fill(n,dcaBFrmElec-dcaAFrmElec);
                        }
                } 
        }  

}

//_______________________________________________________________________________________________
void AliHFEpriVtx::FillNprimVtxContributor() const
{
        //
        // Fill histogram with number of electrons contributing to the primary vertex
        //

        for (int i=0; i<10; i++){
          fPrimVtx[i].fNprimVtxContributor->Fill(fPrimVtx[i].fNprimVtxContributorCount);
        }

}
Commit	Line	Data
259c3296	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	**************************************************************************/
50685501	15	//
	16	// QA class of primary vertex study for Heavy Flavor electrons
	17	//
	18	// Authors:
	19	// MinJung Kweon <minjung@physi.uni-heidelberg.de>
	20	//
259c3296	21
259c3296	22
259c3296	23	#include <TH2F.h>
259c3296	24	#include <TParticle.h>
	25
	26	#include "AliESDEvent.h"
	27	#include <AliESDtrack.h>
	28	#include <AliStack.h>
	29
	30	#include <AliLog.h>
	31	#include <AliKFParticle.h>
	32	#include <AliKFVertex.h>
	33
	34	#include "AliHFEpriVtx.h"
	35
	36
	37	ClassImp(AliHFEpriVtx)
	38
	39	//_______________________________________________________________________________________________
	40	AliHFEpriVtx::AliHFEpriVtx():
	41	fESD1(0x0)
	42	,fStack(0x0)
	43	,fNtrackswoPid(0)
	44	,fHNtrackswoPid(0x0)
	45	,fNESDprimVtxContributor(0x0)
	46	,fNESDprimVtxIndices(0x0)
	47	,fDiffDCAvsPt(0x0)
	48	,fDiffDCAvsNt(0x0)
	49	{
	50	//
	51	// Default constructor
	52	//
	53
	54	Init();
	55
	56	}
	57
	58	//_______________________________________________________________________________________________
	59	AliHFEpriVtx::AliHFEpriVtx(const AliHFEpriVtx &p):
	60	TObject(p)
	61	,fESD1(0x0)
	62	,fStack(0x0)
	63	,fNtrackswoPid(p.fNtrackswoPid)
	64	,fHNtrackswoPid(0x0)
	65	,fNESDprimVtxContributor(0x0)
	66	,fNESDprimVtxIndices(0x0)
	67	,fDiffDCAvsPt(0x0)
	68	,fDiffDCAvsNt(0x0)
	69	{
	70	//
	71	// Copy constructor
	72	//
	73	}
	74
	75	//_______________________________________________________________________________________________
	76	AliHFEpriVtx&
	77	AliHFEpriVtx::operator=(const AliHFEpriVtx &)
	78	{
	79	//
	80	// Assignment operator
	81	//
	82
	83	AliInfo("Not yet implemented.");
	84	return *this;
	85	}
	86
	87	//_______________________________________________________________________________________________
88	AliHFEpriVtx::~AliHFEpriVtx()
89	{
90	//
91	// Destructor
92	//
93
94	AliInfo("Analysis Done.");
95	}
96
97	//__________________________________________
98	void AliHFEpriVtx::Init()
99	{
100	//
101	// initialize counters
102	//
103
104	fNtrackswoPid = 0;
105	for (int i=0; i<10; i++){
106	fPrimVtx[i].fNtrackCount = 0 ;
107	fPrimVtx[i].fNprimVtxContributorCount = 0 ;
108	}
109	}
110
111	//_______________________________________________________________________________________________
112	void AliHFEpriVtx::CreateHistograms(TString hnopt)
113	{
114	//
115	// create histograms
116	//
117
118	fkSourceLabel[kAll]="all";
119	fkSourceLabel[kDirectCharm]="directCharm";
120	fkSourceLabel[kDirectBeauty]="directBeauty";
121	fkSourceLabel[kBeautyCharm]="beauty2charm";
122	fkSourceLabel[kGamma]="gamma";
123	fkSourceLabel[kPi0]="pi0";
124	fkSourceLabel[kElse]="others";
125	fkSourceLabel[kBeautyGamma]="beauty22gamma";
126	fkSourceLabel[kBeautyPi0]="beauty22pi0";
127	fkSourceLabel[kBeautyElse]="beauty22others";
128
129
130	TString hname;
131	for (Int_t isource = 0; isource < 10; isource++ ){
132
133	hname=hnopt+"ntracks_"+fkSourceLabel[isource];
134	fPrimVtx[isource].fNtracks = new TH1F(hname,hname,50,0,50);
135	hname=hnopt+"nPrimVtxContributor_"+fkSourceLabel[isource];
136	fPrimVtx[isource].fNprimVtxContributor = new TH1F(hname,hname,100,0,100);
137	hname=hnopt+"PtElec_"+fkSourceLabel[isource];
78ea5ef4	138	fPrimVtx[isource].fPtElec = new TH1F(hname,hname,250,0,50);
259c3296	139	hname=hnopt+"PtElecContributor_"+fkSourceLabel[isource];
78ea5ef4	140	fPrimVtx[isource].fPtElecContributor = new TH1F(hname,hname,250,0,50);
259c3296	141
	142	}
	143
	144	hname=hnopt+"ntrackswopid";
	145	fHNtrackswoPid = new TH1F(hname,hname,50,0,50);
	146	hname=hnopt+"nESDprimVtxContributor";
	147	fNESDprimVtxContributor = new TH1I(hname,hname,100,0,100);
	148	hname=hnopt+"nESDprimVtxIndices";
	149	fNESDprimVtxIndices= new TH1I(hname,hname,100,0,100);
	150	hname=hnopt+"diffDCAvsPt";
78ea5ef4	151	fDiffDCAvsPt = new TH2F(hname,hname,250,0,50,500,0,1);
259c3296	152	hname=hnopt+"diffDCAvsNt";
	153	fDiffDCAvsNt = new TH2F(hname,hname,100,0,100,500,0,1);
	154
	155	}
	156
	157	//_______________________________________________________________________________________________
	158	void AliHFEpriVtx::CountNtracks(Int_t sourcePart, Int_t recpid, Double_t recprob)
	159	{
	160	//
	161	// count number of tracks passed certain cuts
	162	//
	163
	164	fNtrackswoPid++;
	165
	166	if (!recpid && recprob>0.5)
	167	fPrimVtx[kAll].fNtrackCount++;
	168	if(sourcePart<0) return;
	169	fPrimVtx[sourcePart].fNtrackCount++;
	170
	171	}
	172
	173	//_______________________________________________________________________________________________
	174	void AliHFEpriVtx::FillNtracks()
	175	{
	176	//
	177	// count number of tracks passed certain cuts
	178	//
	179
	180	fHNtrackswoPid->Fill(fNtrackswoPid);
	181	for (int i=0; i<10; i++){
	182	fPrimVtx[i].fNtracks->Fill(fPrimVtx[i].fNtrackCount);
	183	}
	184
	185	}
	186
	187	//_______________________________________________________________________________________________
	188	Int_t AliHFEpriVtx::GetMCPID(AliESDtrack *track)
	189	{
	190	//
	191	// get MC pid
	192	//
	193
	194	Int_t label = TMath::Abs(track->GetLabel());
	195	TParticle* mcpart = fStack->Particle(label);
	196	if ( !mcpart ) return 0;
	197	Int_t pdgCode = mcpart->GetPdgCode();
	198
	199	return pdgCode;
	200	}
	201
	202	//_______________________________________________________________________________________________
	203	void AliHFEpriVtx::GetNPriVxtContributor()
	204	{
	205	//
	206	// count number of primary vertex contributor
	207	//
	208
	209	const AliESDVertex *primvtx = fESD1->GetPrimaryVertex();
	210	fNESDprimVtxContributor->Fill(primvtx->GetNContributors());
	211	fNESDprimVtxIndices->Fill(primvtx->GetNIndices());
	212	}
	213
	214	//_______________________________________________________________________________________________
	215	void AliHFEpriVtx::CountPriVxtElecContributor(AliESDtrack *ESDelectron, Int_t sourcePart, Int_t recpid, Double_t recprob)
216	{
217	//
218	// count number of electrons contributing to the primary vertex
219	//
220
221
222	if (recpid \|\| recprob<0.5) return;
223
224	// get track id of our selected electron
225	Int_t elecTrkID = ESDelectron->GetID();
226
227	Int_t label = TMath::Abs(ESDelectron->GetLabel());
228	TParticle* mcpart = fStack->Particle(label);
229
230	AliKFParticle::SetField(fESD1->GetMagneticField());
231	AliKFParticle kfElectron(*ESDelectron,11);
232
233	// prepare kfprimary vertex
234	AliKFVertex kfESDprimary;
235
236	// Reconstructed Primary Vertex (with ESD tracks)
237	const AliESDVertex *primvtx = fESD1->GetPrimaryVertex();
238	// Int_t nt = primvtx->GetNContributors();
239	Int_t n=primvtx->GetNIndices();
240
241	if (n>0 && primvtx->GetStatus()){
242
243	kfESDprimary = AliKFVertex(*primvtx);
244	Double_t dcaBFrmElec = kfElectron.GetDistanceFromVertexXY(kfESDprimary);
245
246	UShort_t *priIndex = primvtx->GetIndices();
247
248	fPrimVtx[kAll].fPtElec->Fill(mcpart->Pt());
249	if(sourcePart>=0) fPrimVtx[sourcePart].fPtElec->Fill(mcpart->Pt());
250
251	for (Int_t i=0;i<n;i++){
252
253	Int_t idx = Int_t(priIndex[i]);
254	if (idx == elecTrkID){
255	fPrimVtx[kAll].fNprimVtxContributorCount++;
256	fPrimVtx[kAll].fPtElecContributor->Fill(mcpart->Pt());
257	if(sourcePart<0) continue;
258	fPrimVtx[sourcePart].fNprimVtxContributorCount++;
259	fPrimVtx[sourcePart].fPtElecContributor->Fill(mcpart->Pt());
260
261	kfESDprimary -= kfElectron;
262	Double_t dcaAFrmElec = kfElectron.GetDistanceFromVertexXY(kfESDprimary);
263	fDiffDCAvsPt->Fill(mcpart->Pt(),dcaBFrmElec-dcaAFrmElec);
264	fDiffDCAvsNt->Fill(n,dcaBFrmElec-dcaAFrmElec);
265	}
266	}
267	}
268
269	}
270
271	//_______________________________________________________________________________________________
75d81601	272	void AliHFEpriVtx::FillNprimVtxContributor() const
259c3296	273	{
	274	//
	275	// Fill histogram with number of electrons contributing to the primary vertex
	276	//
	277
	278	for (int i=0; i<10; i++){
	279	fPrimVtx[i].fNprimVtxContributor->Fill(fPrimVtx[i].fNprimVtxContributorCount);
	280	}
	281
	282	}