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