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Add the eta and phi direction of the leading particle.
[u/mrichter/AliRoot.git] / PWG4 / PartCorrDep / AliAnaParticleHadronCorrelation.cxx
CommitLineData
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 for the analysis of particle - hadron correlations
19// Particle (for example direct gamma) must be found in a previous analysis
20//-- Author: Gustavo Conesa (LNF-INFN)
21//////////////////////////////////////////////////////////////////////////////
22
23
24// --- ROOT system ---
25#include "TH2F.h"
477d6cee 26#include "TClonesArray.h"
1c5acb87 27
28//---- ANALYSIS system ----
1c5acb87 29#include "AliNeutralMesonSelection.h"
30#include "AliAnaParticleHadronCorrelation.h"
31#include "AliCaloTrackReader.h"
32#include "AliCaloPID.h"
33#include "AliAODPWG4ParticleCorrelation.h"
477d6cee 34#include "AliFidutialCut.h"
35#include "AliAODTrack.h"
36#include "AliAODCaloCluster.h"
1c5acb87 37
38ClassImp(AliAnaParticleHadronCorrelation)
39
40
41//____________________________________________________________________________
42 AliAnaParticleHadronCorrelation::AliAnaParticleHadronCorrelation() :
43 AliAnaPartCorrBaseClass(),
6639984f 44 fDeltaPhiMaxCut(0.), fDeltaPhiMinCut(0.), fSelectIsolated(0),
477d6cee 45 fhPhiCharged(0), fhPhiNeutral(0), fhEtaCharged(0), fhEtaNeutral(0),
1c5acb87 46 fhDeltaPhiCharged(0), fhDeltaPhiNeutral(0),
47 fhDeltaEtaCharged(0), fhDeltaEtaNeutral(0),
48 fhDeltaPhiChargedPt(0), fhDeltaPhiNeutralPt(0),
49 fhPtImbalanceNeutral(0), fhPtImbalanceCharged(0)
50{
51 //Default Ctor
477d6cee 52
1c5acb87 53 //Initialize parameters
54 InitParameters();
55}
56
57//____________________________________________________________________________
58AliAnaParticleHadronCorrelation::AliAnaParticleHadronCorrelation(const AliAnaParticleHadronCorrelation & g) :
59 AliAnaPartCorrBaseClass(g),
60 fDeltaPhiMaxCut(g.fDeltaPhiMaxCut), fDeltaPhiMinCut(g.fDeltaPhiMinCut),
6639984f 61 fSelectIsolated(g.fSelectIsolated),
1c5acb87 62 fhPhiCharged(g.fhPhiCharged), fhPhiNeutral(g.fhPhiNeutral),
63 fhEtaCharged(g.fhEtaCharged), fhEtaNeutral(g.fhEtaNeutral),
64 fhDeltaPhiCharged(g.fhDeltaPhiCharged),
65 fhDeltaPhiNeutral(g.fhDeltaPhiNeutral),
66 fhDeltaEtaCharged(g.fhDeltaEtaCharged),
67 fhDeltaEtaNeutral(g.fhDeltaEtaNeutral),
68 fhDeltaPhiChargedPt(g.fhDeltaPhiChargedPt),
69 fhDeltaPhiNeutralPt(g.fhDeltaPhiNeutralPt),
70 fhPtImbalanceNeutral(g.fhPtImbalanceNeutral),
71 fhPtImbalanceCharged(g.fhPtImbalanceCharged)
72{
73 // cpy ctor
477d6cee 74
1c5acb87 75}
76
77//_________________________________________________________________________
78AliAnaParticleHadronCorrelation & AliAnaParticleHadronCorrelation::operator = (const AliAnaParticleHadronCorrelation & source)
79{
80 // assignment operator
477d6cee 81
1c5acb87 82 if(this == &source)return *this;
83 ((AliAnaPartCorrBaseClass *)this)->operator=(source);
84
85 fDeltaPhiMaxCut = source.fDeltaPhiMaxCut ;
86 fDeltaPhiMinCut = source.fDeltaPhiMinCut ;
6639984f 87 fSelectIsolated = source.fSelectIsolated ;
477d6cee 88
1c5acb87 89 fhPhiCharged = source.fhPhiCharged ; fhPhiNeutral = source.fhPhiNeutral ;
90 fhEtaCharged = source.fhEtaCharged ; fhEtaNeutral = source.fhEtaNeutral ;
91 fhDeltaPhiCharged = source.fhDeltaPhiCharged ;
92 fhDeltaPhiNeutral = source.fhDeltaPhiNeutral ;
93 fhDeltaPhiNeutralPt = source.fhDeltaPhiNeutralPt ;
94 fhDeltaEtaCharged = source.fhDeltaEtaCharged ;
95 fhDeltaEtaNeutral = source.fhDeltaEtaNeutral ;
96 fhDeltaPhiChargedPt = source.fhDeltaPhiChargedPt ;
477d6cee 97
1c5acb87 98 fhPtImbalanceNeutral = source.fhPtImbalanceNeutral ;
99 fhPtImbalanceCharged = source.fhPtImbalanceCharged ;
100
101 return *this;
102
103}
104
105//________________________________________________________________________
106TList * AliAnaParticleHadronCorrelation::GetCreateOutputObjects()
107{
477d6cee 108
109 // Create histograms to be saved in output file and
110 // store them in fOutputContainer
111 TList * outputContainer = new TList() ;
112 outputContainer->SetName("CorrelationHistos") ;
113
114 Int_t nptbins = GetHistoNPtBins();
115 Int_t nphibins = GetHistoNPhiBins();
116 Int_t netabins = GetHistoNEtaBins();
117 Float_t ptmax = GetHistoPtMax();
118 Float_t phimax = GetHistoPhiMax();
119 Float_t etamax = GetHistoEtaMax();
120 Float_t ptmin = GetHistoPtMin();
121 Float_t phimin = GetHistoPhiMin();
122 Float_t etamin = GetHistoEtaMin();
123
124 //Correlation with charged hadrons
125 if(GetReader()->IsCTSSwitchedOn()) {
126 fhPhiCharged = new TH2F
127 ("PhiCharged","#phi_{h^{#pm}} vs p_{T trigger}",
128 nptbins,ptmin,ptmax,nphibins,phimin,phimax);
129 fhPhiCharged->SetYTitle("#phi_{h^{#pm}} (rad)");
130 fhPhiCharged->SetXTitle("p_{T trigger} (GeV/c)");
131
132 fhEtaCharged = new TH2F
133 ("EtaCharged","#eta_{h^{#pm}} vs p_{T trigger}",
134 nptbins,ptmin,ptmax,netabins,etamin,etamax);
135 fhEtaCharged->SetYTitle("#eta_{h^{#pm}} (rad)");
136 fhEtaCharged->SetXTitle("p_{T trigger} (GeV/c)");
137
138 fhDeltaPhiCharged = new TH2F
139 ("DeltaPhiCharged","#phi_{trigger} - #phi_{h^{#pm}} vs p_{T trigger}",
140 nptbins,ptmin,ptmax,200,0,6.4);
141 fhDeltaPhiCharged->SetYTitle("#Delta #phi");
142 fhDeltaPhiCharged->SetXTitle("p_{T trigger} (GeV/c)");
143
144 fhDeltaPhiChargedPt = new TH2F
145 ("DeltaPhiChargedPt","#phi_{trigger} - #phi_{#p^{#pm}i} vs p_{T h^{#pm}}",
146 nptbins,ptmin,ptmax,200,0,6.4);
147 fhDeltaPhiChargedPt->SetYTitle("#Delta #phi");
148 fhDeltaPhiChargedPt->SetXTitle("p_{T h^{#pm}} (GeV/c)");
149
150 fhDeltaEtaCharged = new TH2F
151 ("DeltaEtaCharged","#eta_{trigger} - #eta_{h^{#pm}} vs p_{T trigger}",
152 nptbins,ptmin,ptmax,200,-2,2);
153 fhDeltaEtaCharged->SetYTitle("#Delta #eta");
154 fhDeltaEtaCharged->SetXTitle("p_{T trigger} (GeV/c)");
155
156 fhPtImbalanceCharged =
157 new TH2F("CorrelationCharged","z_{trigger h^{#pm}} = p_{T h^{#pm}} / p_{T trigger}",
158 nptbins,ptmin,ptmax,1000,0.,1.2);
159 fhPtImbalanceCharged->SetYTitle("z_{trigger h^{#pm}}");
160 fhPtImbalanceCharged->SetXTitle("p_{T trigger}");
161
162 outputContainer->Add(fhPhiCharged) ;
163 outputContainer->Add(fhEtaCharged) ;
164 outputContainer->Add(fhDeltaPhiCharged) ;
165 outputContainer->Add(fhDeltaEtaCharged) ;
166 outputContainer->Add(fhPtImbalanceCharged) ;
167 outputContainer->Add(fhDeltaPhiChargedPt) ;
168 } //Correlation with charged hadrons
169
170 //Correlation with neutral hadrons
171 if(GetReader()->IsEMCALSwitchedOn() || GetReader()->IsPHOSSwitchedOn()){
172
173 fhPhiNeutral = new TH2F
174 ("PhiNeutral","#phi_{#pi^{0}} vs p_{T trigger}",
175 nptbins,ptmin,ptmax,nphibins,phimin,phimax);
176 fhPhiNeutral->SetYTitle("#phi_{#pi^{0}} (rad)");
177 fhPhiNeutral->SetXTitle("p_{T trigger} (GeV/c)");
178
179 fhEtaNeutral = new TH2F
180 ("EtaNeutral","#eta_{#pi^{0}} vs p_{T trigger}",
181 nptbins,ptmin,ptmax,netabins,etamin,etamax);
182 fhEtaNeutral->SetYTitle("#eta_{#pi^{0}} (rad)");
183 fhEtaNeutral->SetXTitle("p_{T trigger} (GeV/c)");
184
185 fhDeltaPhiNeutral = new TH2F
186 ("DeltaPhiNeutral","#phi_{trigger} - #phi_{#pi^{0}} vs p_{T trigger}",
187 nptbins,ptmin,ptmax,nphibins,phimin,phimax);
188 fhDeltaPhiNeutral->SetYTitle("#Delta #phi");
189 fhDeltaPhiNeutral->SetXTitle("p_{T trigger} (GeV/c)");
190
191 fhDeltaPhiNeutralPt = new TH2F
192 ("DeltaPhiNeutralPt","#phi_{trigger} - #phi_{#pi^{0}} vs p_{T #pi^{0}}}",
193 nptbins,ptmin,ptmax,200,0,6.4);
194 fhDeltaPhiNeutralPt->SetYTitle("#Delta #phi");
195 fhDeltaPhiNeutralPt->SetXTitle("p_{T trigger} (GeV/c)");
196
197 fhDeltaEtaNeutral = new TH2F
198 ("DeltaEtaNeutral","#eta_{trigger} - #eta_{#pi^{0}} vs p_{T trigger}",
199 nptbins,ptmin,ptmax,200,-2,2);
200 fhDeltaEtaNeutral->SetYTitle("#Delta #eta");
201 fhDeltaEtaNeutral->SetXTitle("p_{T trigger} (GeV/c)");
202
203 fhPtImbalanceNeutral =
204 new TH2F("CorrelationNeutral","z_{trigger #pi} = p_{T #pi^{0}} / p_{T trigger}",
205 nptbins,ptmin,ptmax,1000,0.,1.2);
206 fhPtImbalanceNeutral->SetYTitle("z_{trigger #pi^{0}}");
207 fhPtImbalanceNeutral->SetXTitle("p_{T trigger}");
208
209 outputContainer->Add(fhPhiNeutral) ;
210 outputContainer->Add(fhEtaNeutral) ;
211 outputContainer->Add(fhDeltaPhiNeutral) ;
212 outputContainer->Add(fhDeltaEtaNeutral) ;
213 outputContainer->Add(fhPtImbalanceNeutral) ;
214
215
216 //Keep neutral meson selection histograms if requiered
217 //Setting done in AliNeutralMesonSelection
218 if(GetNeutralMesonSelection()){
219 TList * nmsHistos = GetNeutralMesonSelection()->GetCreateOutputObjects() ;
220 if(GetNeutralMesonSelection()->AreNeutralMesonSelectionHistosKept())
221 for(Int_t i = 0; i < nmsHistos->GetEntries(); i++) outputContainer->Add(nmsHistos->At(i)) ;
222 }
a3aebfff 223
477d6cee 224 }//Correlation with neutral hadrons
225
226 return outputContainer;
a3aebfff 227
1c5acb87 228}
229
477d6cee 230//____________________________________________________________________________
1c5acb87 231void AliAnaParticleHadronCorrelation::InitParameters()
232{
477d6cee 233
1c5acb87 234 //Initialize the parameters of the analysis.
a3aebfff 235 SetInputAODName("PWG4Particle");
236 SetAODRefArrayName("Hadrons");
237 AddToHistogramsName("AnaHadronCorr_");
238
1c5acb87 239 SetPtCutRange(2,300);
240 fDeltaPhiMinCut = 1.5 ;
241 fDeltaPhiMaxCut = 4.5 ;
6639984f 242 fSelectIsolated = kFALSE;
1c5acb87 243}
244
245//__________________________________________________________________
246void AliAnaParticleHadronCorrelation::Print(const Option_t * opt) const
247{
248
249 //Print some relevant parameters set for the analysis
250 if(! opt)
251 return;
252
a3aebfff 253 printf("**** Print %s %s ****\n", GetName(), GetTitle() ) ;
254 AliAnaPartCorrBaseClass::Print(" ");
255
1c5acb87 256 printf("Phi trigger particle-Hadron < %3.2f\n", fDeltaPhiMaxCut) ;
257 printf("Phi trigger particle-Hadron > %3.2f\n", fDeltaPhiMinCut) ;
6639984f 258 printf("Isolated Trigger? %d\n", fSelectIsolated) ;
1c5acb87 259}
260
261//____________________________________________________________________________
262void AliAnaParticleHadronCorrelation::MakeAnalysisFillAOD()
263{
477d6cee 264 //Particle-Hadron Correlation Analysis, fill AODs
265
266 if(!GetInputAODBranch()){
a3aebfff 267 printf("AliAnaParticleHadronCorrelation::MakeAnalysisFillAOD() - No input particles in AOD with name branch < %s >, ABORT \n",GetInputAODName().Data());
477d6cee 268 abort();
269 }
270 if(GetDebug() > 1){
a3aebfff 271 printf("AliAnaParticleHadronCorrelation::MakeAnalysisFillAOD() - Begin hadron correlation analysis, fill AODs \n");
272 printf("AliAnaParticleHadronCorrelation::MakeAnalysisFillAOD() - In particle branch aod entries %d\n", GetInputAODBranch()->GetEntriesFast());
273 printf("AliAnaParticleHadronCorrelation::MakeAnalysisFillAOD() - In CTS aod entries %d\n", GetAODCTS()->GetEntriesFast());
274 printf("AliAnaParticleHadronCorrelation::MakeAnalysisFillAOD() - In EMCAL aod entries %d\n", GetAODEMCAL()->GetEntriesFast());
275 printf("AliAnaParticleHadronCorrelation::MakeAnalysisFillAOD() - In PHOS aod entries %d\n", GetAODPHOS()->GetEntriesFast());
477d6cee 276 }
277
278 //Loop on stored AOD particles, trigger
279 Int_t naod = GetInputAODBranch()->GetEntriesFast();
280 for(Int_t iaod = 0; iaod < naod ; iaod++){
281 AliAODPWG4ParticleCorrelation* particle = (AliAODPWG4ParticleCorrelation*) (GetInputAODBranch()->At(iaod));
a3aebfff 282
477d6cee 283 //Make correlation with charged hadrons
284 if(GetReader()->IsCTSSwitchedOn() )
a3aebfff 285 MakeChargedCorrelation(particle, GetAODCTS(),kFALSE);
477d6cee 286
287 //Make correlation with neutral pions
288 //Trigger particle in PHOS, correlation with EMCAL
289 if(particle->GetDetector()=="PHOS" && GetReader()->IsEMCALSwitchedOn() && GetAODEMCAL()->GetEntriesFast() > 0)
a3aebfff 290 MakeNeutralCorrelation(particle, GetAODEMCAL(),kFALSE);
477d6cee 291 //Trigger particle in EMCAL, correlation with PHOS
292 else if(particle->GetDetector()=="EMCAL" && GetReader()->IsPHOSSwitchedOn() && GetAODPHOS()->GetEntriesFast() > 0)
a3aebfff 293 MakeNeutralCorrelation(particle, GetAODPHOS(),kFALSE);
477d6cee 294 //Trigger particle in CTS, correlation with PHOS, EMCAL and CTS
295 else if(particle->GetDetector()=="CTS" ){
296 if(GetReader()->IsPHOSSwitchedOn() && GetAODPHOS()->GetEntriesFast() > 0)
a3aebfff 297 MakeNeutralCorrelation(particle, GetAODPHOS(),kFALSE);
477d6cee 298 if(GetReader()->IsEMCALSwitchedOn() && GetAODEMCAL()->GetEntriesFast() > 0)
a3aebfff 299 MakeNeutralCorrelation(particle, GetAODEMCAL(),kFALSE);
477d6cee 300 }
a3aebfff 301
302
477d6cee 303 }//Aod branch loop
304
a3aebfff 305 if(GetDebug() > 1) printf("AliAnaParticleHadronCorrelation::MakeAnalysisFillAOD() - End fill AODs \n");
477d6cee 306
1c5acb87 307}
308
309//____________________________________________________________________________
310void AliAnaParticleHadronCorrelation::MakeAnalysisFillHistograms()
311{
477d6cee 312 //Particle-Hadron Correlation Analysis, fill histograms
313
314 if(!GetInputAODBranch()){
a3aebfff 315 printf("AliAnaParticleHadronCorrelation::MakeAnalysisFillHistograms() - No input particles in AOD with name branch < %s >, ABORT \n",GetInputAODName().Data());
477d6cee 316 abort();
317 }
a3aebfff 318
477d6cee 319 if(GetDebug() > 1){
a3aebfff 320 printf("AliAnaParticleHadronCorrelation::MakeAnalysisFillHistograms() - Begin hadron correlation analysis, fill histograms \n");
321 printf("AliAnaParticleHadronCorrelation::MakeAnalysisFillHistograms() - In particle branch aod entries %d\n", GetInputAODBranch()->GetEntriesFast());
477d6cee 322 }
a3aebfff 323
477d6cee 324 //Loop on stored AOD particles
325 Int_t naod = GetInputAODBranch()->GetEntriesFast();
326 for(Int_t iaod = 0; iaod < naod ; iaod++){
a3aebfff 327 AliAODPWG4ParticleCorrelation* particle = (AliAODPWG4ParticleCorrelation*) (GetInputAODBranch()->At(iaod));
328
329 //check if the particle is isolated or if we want to take the isolation into account
330 if(OnlyIsolated() && !particle->IsIsolated()) continue;
331
332 //Make correlation with charged hadrons
333 TRefArray * reftracks = particle->GetRefArray(GetAODRefArrayName()+"Tracks");
334 if(reftracks){
335 if(GetDebug() > 1) printf("AliAnaParticleHadronCorrelation::MakeAnalysisFillHistograms() - Particle %d, In Track Refs entries %d\n", iaod, reftracks->GetEntriesFast());
336 if(reftracks->GetEntriesFast() > 0) MakeChargedCorrelation(particle, reftracks,kTRUE);
337 }
338
339 //Make correlation with neutral pions
340 TRefArray * refclusters = particle->GetRefArray(GetAODRefArrayName()+"Clusters");
341 if(refclusters && refclusters->GetEntriesFast() > 0){
342 if(GetDebug() > 1) printf("AliAnaParticleHadronCorrelation::MakeAnalysisFillHistograms() - Particle %d, In Cluster Refs entries %d\n",iaod, refclusters->GetEntriesFast());
343 if(refclusters->GetEntriesFast() > 0) MakeNeutralCorrelation(particle,refclusters, kTRUE);
344 }
345
477d6cee 346 }//Aod branch loop
347
a3aebfff 348 if(GetDebug() > 1) printf("AliAnaParticleHadronCorrelation::MakeAnalysisFillHistograms() - End fill histograms \n");
477d6cee 349
1c5acb87 350}
351
352//____________________________________________________________________________
a3aebfff 353void AliAnaParticleHadronCorrelation::MakeChargedCorrelation(AliAODPWG4ParticleCorrelation *aodParticle, TRefArray* pl, const Bool_t bFillHisto)
1c5acb87 354{
355 // Charged Hadron Correlation Analysis
a3aebfff 356 if(GetDebug() > 1)printf("AliAnaParticleHadronCorrelation::MakeChargedCorrelation() - Make trigger particle - charged hadron correlation \n");
1c5acb87 357
358 Double_t ptTrig = aodParticle->Pt();
359 Double_t phiTrig = aodParticle->Phi();
360 Double_t pt = -100.;
361 Double_t rat = -100.;
362 Double_t phi = -100. ;
363 Double_t eta = -100. ;
364 Double_t p[3];
477d6cee 365 Bool_t first=kTRUE;
1c5acb87 366
a3aebfff 367 TRefArray * reftracks =0x0;
368 if(!bFillHisto)
369 reftracks = new TRefArray;
370
371
1c5acb87 372 //Track loop, select tracks with good pt, phi and fill AODs or histograms
373 for(Int_t ipr = 0;ipr < pl->GetEntries() ; ipr ++ ){
374 AliAODTrack * track = (AliAODTrack *) (pl->At(ipr)) ;
375 track->GetPxPyPz(p) ;
376 TLorentzVector mom(p[0],p[1],p[2],0);
377 pt = mom.Pt();
378 eta = mom.Eta();
379 phi = mom.Phi() ;
380 if(phi<0) phi+=TMath::TwoPi();
381 rat = pt/ptTrig ;
477d6cee 382
1c5acb87 383 if(IsFidutialCutOn()){
384 Bool_t in = GetFidutialCut()->IsInFidutialCut(mom,"CTS") ;
385 if(! in ) continue ;
386 }
387
388 //Select only hadrons in pt range
389 if(pt < GetMinPt() || pt > GetMaxPt()) continue ;
390
391 if(GetDebug() > 2)
a3aebfff 392 printf("AliAnaParticleHadronCorrelation::MakeChargedCorrelation() - Charged hadron: pt %f, phi %f, phi trigger %f. Cuts: delta phi min %2.2f, max%2.2f, pT min %2.2f \n",
1c5acb87 393 pt,phi,phiTrig,fDeltaPhiMinCut, fDeltaPhiMaxCut, GetMinPt());
394
395 if(bFillHisto){
396 // Fill Histograms
397 fhEtaCharged->Fill(ptTrig,eta);
398 fhPhiCharged->Fill(ptTrig,phi);
399 fhDeltaEtaCharged->Fill(ptTrig,aodParticle->Eta()-eta);
400 fhDeltaPhiCharged->Fill(ptTrig,phiTrig-phi);
401 fhDeltaPhiChargedPt->Fill(pt,phiTrig-phi);
402 //Selection within angular range
403 if(((phiTrig-phi)> fDeltaPhiMinCut) && ((phiTrig-phi)<fDeltaPhiMaxCut) ){
a3aebfff 404 if(GetDebug() > 2 ) printf("AliAnaParticleHadronCorrelation::MakeChargedCorrelation() - Selected charge for momentum imbalance: pt %2.2f, phi %2.2f, eta %2.2f \n",pt,phi,eta);
1c5acb87 405 fhPtImbalanceCharged->Fill(ptTrig,rat);
406 }
407 }
408 else{
409 //Fill AODs
477d6cee 410
411 if(first) {
a3aebfff 412 new (reftracks) TRefArray(TProcessID::GetProcessWithUID(track));
477d6cee 413 first = kFALSE;
414 }
a3aebfff 415
416 reftracks->Add(track);
1c5acb87 417
418 }//aod particle loop
419 }// track loop
420
a3aebfff 421 //Fill AOD with reference tracks, if not filling histograms
422 if(!bFillHisto && reftracks->GetEntriesFast() > 0) {
423 reftracks->SetName(GetAODRefArrayName()+"Tracks");
424 aodParticle->AddRefArray(reftracks);
425 }
426
1c5acb87 427}
428//____________________________________________________________________________
a3aebfff 429void AliAnaParticleHadronCorrelation::MakeNeutralCorrelation(AliAODPWG4ParticleCorrelation * aodParticle,TRefArray* pl, const Bool_t bFillHisto)
1c5acb87 430{
431 // Neutral Pion Correlation Analysis
a3aebfff 432 if(GetDebug() > 1) printf("AliAnaParticleHadronCorrelation::MakeNeutralCorrelation() - Make trigger particle - neutral hadron correlation \n");
1c5acb87 433
434 Double_t pt = -100.;
435 Double_t rat = -100.;
436 Double_t phi = -100. ;
437 Double_t eta = -100. ;
438 Double_t ptTrig = aodParticle->Pt();
439 Double_t phiTrig = aodParticle->Phi();
440 Double_t etaTrig = aodParticle->Eta();
477d6cee 441 Bool_t first = kTRUE;
442
1c5acb87 443 TLorentzVector gammai;
444 TLorentzVector gammaj;
445
446 Double_t vertex[] = {0,0,0};
1c5acb87 447 if(!GetReader()->GetDataType()== AliCaloTrackReader::kMC) GetReader()->GetVertex(vertex);
448
a3aebfff 449 TRefArray * refclusters =0x0;
450 if(!bFillHisto)
451 refclusters = new TRefArray;
452
1c5acb87 453 //Cluster loop, select pairs with good pt, phi and fill AODs or histograms
454 for(Int_t iclus = 0;iclus < pl->GetEntries() ; iclus ++ ){
455 AliAODCaloCluster * calo = (AliAODCaloCluster *) (pl->At(iclus)) ;
456 if(!bFillHisto){
477d6cee 457
1c5acb87 458 //Cluster selection, not charged, with photon or pi0 id and in fidutial cut
459 Int_t pdg=0;
460 if(!SelectCluster(calo, vertex, gammai, pdg)) continue ;
461
477d6cee 462 if(GetDebug() > 2)
a3aebfff 463 printf("AliAnaParticleHadronCorrelation::MakeNeutralCorrelation() - Neutral cluster: pt %f, phi %f, phi trigger %f. Cuts: delta phi min %2.2f, max%2.2f, pT min %2.2f \n",
477d6cee 464 gammai.Pt(),gammai.Phi(),phiTrig,fDeltaPhiMinCut, fDeltaPhiMaxCut, GetMinPt());
465
1c5acb87 466 //2 gamma overlapped, found with PID
467 if(pdg == AliCaloPID::kPi0){
477d6cee 468
1c5acb87 469 //Select only hadrons in pt range
470 if(gammai.Pt() < GetMinPt() || gammai.Pt() > GetMaxPt()) continue ;
477d6cee 471
472 if(first) {
a3aebfff 473 new (refclusters) TRefArray(TProcessID::GetProcessWithUID(calo));
477d6cee 474 first = kFALSE;
475 }
476
a3aebfff 477 refclusters->Add(calo);
478 if(GetDebug() > 2) printf("AliAnaParticleHadronCorrelation::MakeNeutralCorrelation() - Correlated with selected pi0 (pid): pt %f, phi %f\n",gammai.Pt(),gammai.Phi());
477d6cee 479
1c5acb87 480 }// pdg = 111
477d6cee 481
1c5acb87 482 //Make invariant mass analysis
483 else if(pdg == AliCaloPID::kPhoton){
484 //Search the photon companion in case it comes from a Pi0 decay
485 //Apply several cuts to select the good pair;
486 for(Int_t jclus = iclus+1; jclus < pl->GetEntries() ; jclus ++ ){
487 AliAODCaloCluster * calo2 = (AliAODCaloCluster *) (pl->At(jclus)) ;
488
489 //Cluster selection, not charged with photon or pi0 id and in fidutial cut
490 Int_t pdgj=0;
491 if(!SelectCluster(calo2,vertex, gammaj, pdgj)) continue ;
477d6cee 492
1c5acb87 493 if(pdgj == AliCaloPID::kPhoton ){
494
495 if((gammai+gammaj).Pt() < GetMinPt() || (gammai+gammaj).Pt() > GetMaxPt()) continue ;
496
497 //Select good pair (aperture and invariant mass)
498 if(GetNeutralMesonSelection()->SelectPair(gammai, gammaj)){
477d6cee 499
a3aebfff 500 if(GetDebug() > 2 ) printf("AliAnaParticleHadronCorrelation::MakeNeutralCorrelation() - Neutral Hadron Correlation: AOD Selected gamma pair: pt %2.2f, phi %2.2f, eta %2.2f, M %2.3f\n",
1c5acb87 501 (gammai+gammaj).Pt(),(gammai+gammaj).Phi(),(gammai+gammaj).Eta(), (gammai+gammaj).M());
502 Int_t labels[]={calo->GetLabel(0),calo2->GetLabel(0)};
503 Float_t pid[]={0,0,0,0,0,0,1,0,0,0,0,0,0};//Pi0 weight 1
504 Float_t pos[]={(gammai+gammaj).X(), (gammai+gammaj).Y(), (gammai+gammaj).Z()};
477d6cee 505
1c5acb87 506 AliAODCaloCluster *caloCluster = new AliAODCaloCluster(0,2,labels,(gammai+gammaj).E(), pos, pid,calo->GetType(),0);
477d6cee 507 //Put this new object in file, need to think better how to do this!!!!
508 GetReader()->GetAODEMCAL()->Add(caloCluster);
509
510 if(first) {
a3aebfff 511 new (refclusters) TRefArray(TProcessID::GetProcessWithUID(caloCluster));
477d6cee 512 first = kFALSE;
513 }
a3aebfff 514
515 refclusters->Add(calo);
516
1c5acb87 517 }//Pair selected
518 }//if pair of gammas
519 }//2nd loop
520 }// if pdg = 22
521 }// Fill AODs
522 else{ //Fill histograms
523
524 calo->GetMomentum(gammai,vertex);//Assume that come from vertex in straight line
525 pt = gammai.Pt();
526
527 if(pt < GetMinPt() || pt > GetMaxPt()) continue ;
528
529 rat = pt/ptTrig ;
530 phi = gammai.Phi() ;
531 eta = gammai.Eta() ;
477d6cee 532
a3aebfff 533 if(GetDebug() > 2 ) printf("AliAnaParticleHadronCorrelation::MakeNeutralCorrelation() - Neutral Hadron Correlation: Histograms selected gamma pair: pt %2.2f, phi %2.2f, eta %2.2f\n",pt,phi,eta);
1c5acb87 534
535 fhEtaNeutral->Fill(ptTrig,eta);
536 fhPhiNeutral->Fill(ptTrig,phi);
537 fhDeltaEtaNeutral->Fill(ptTrig,etaTrig-eta);
538 fhDeltaPhiNeutral->Fill(ptTrig,phiTrig-phi);
539 fhDeltaPhiNeutralPt->Fill(pt,phiTrig-phi);
540 //Selection within angular range
541 if(((phiTrig-phi)> fDeltaPhiMinCut) && ((phiTrig-phi)<fDeltaPhiMaxCut) ){
a3aebfff 542 if(GetDebug() > 2 ) printf("AliAnaParticleHadronCorrelation::MakeNeutralCorrelation() - Selected neutral for momentum imbalance: pt %2.2f, phi %2.2f, eta %2.2f \n",pt,phi,eta);
1c5acb87 543 fhPtImbalanceNeutral->Fill(ptTrig,rat);
544 }
545 }//Fill histograms
546 }//1st loop
547
a3aebfff 548 //Fill AOD with reference tracks, if not filling histograms
549 if(!bFillHisto && refclusters->GetEntriesFast() > 0) {
550 refclusters->SetName(GetAODRefArrayName()+"Clusters");
551 aodParticle->AddRefArray(refclusters);
552 }
1c5acb87 553}
554
555//____________________________________________________________________________
556Bool_t AliAnaParticleHadronCorrelation::SelectCluster(AliAODCaloCluster * calo, Double_t *vertex, TLorentzVector & mom, Int_t & pdg) const {
557 //Select cluster depending on its pid and acceptance selections
558
559 //Skip matched clusters with tracks
560 if(calo->GetNTracksMatched() > 0) {
561 return kFALSE;}
562
563 //Check PID
564 calo->GetMomentum(mom,vertex);//Assume that come from vertex in straight line
565 pdg = AliCaloPID::kPhoton;
566 if(IsCaloPIDOn()){
567 //Get most probable PID, 2 options check PID weights (in MC this option is mandatory)
568 //or redo PID, recommended option for EMCal.
569 TString detector = "";
570 if(calo->IsPHOSCluster()) detector= "PHOS";
571 else if(calo->IsEMCALCluster()) detector= "EMCAL";
572
573 if(!IsCaloPIDRecalculationOn() || GetReader()->GetDataType() == AliCaloTrackReader::kMC )
574 pdg = GetCaloPID()->GetPdg(detector,calo->PID(),mom.E());//PID with weights
575 else
576 pdg = GetCaloPID()->GetPdg(detector,mom,calo);//PID recalculated
577
a3aebfff 578 if(GetDebug() > 1) printf("AliAnaParticleHadronCorrelation::SelectCluster() - PDG of identified particle %d\n",pdg);
1c5acb87 579
580 //If it does not pass pid, skip
581 if(pdg != AliCaloPID::kPhoton || pdg != AliCaloPID::kPi0) {
582 return kFALSE ;
583 }
584 }
585
586 //Check acceptance selection
587 if(IsFidutialCutOn()){
588 Bool_t in = kFALSE;
589 if(calo->IsPHOSCluster())
590 in = GetFidutialCut()->IsInFidutialCut(mom,"PHOS") ;
591 else if(calo->IsEMCALCluster())
592 in = GetFidutialCut()->IsInFidutialCut(mom,"EMCAL") ;
593 if(! in ) { return kFALSE ;}
594 }
595
a3aebfff 596 if(GetDebug() > 1) printf("AliAnaParticleHadronCorrelation::SelectCluster() - Correlation photon selection cuts passed: pT %3.2f, pdg %d\n",mom.Pt(), pdg);
1c5acb87 597
598 return kTRUE;
599
600 }