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4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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14 **************************************************************************/
15 /* $Id: AliAnaParticleJetFinderCorrelation.cxx 22232 2007-11-17 16:39:49Z gustavo $ */
17 //_________________________________________________________________________
18 // Class for the analysis of particle (direct gamma) -jet (jet found with finder) correlations
19 //*-- Author: Gustavo Conesa (LNF-INFN)
20 //////////////////////////////////////////////////////////////////////////////
23 // --- ROOT system ---
25 #include "TClonesArray.h"
27 //#include "Riostream.h"
29 //---- AliRoot system ----
30 #include "AliCaloTrackReader.h"
31 #include "AliAODJet.h"
32 #include "AliAnaParticleJetFinderCorrelation.h"
33 #include "AliAODPWG4ParticleCorrelation.h"
34 #include "AliAODTrack.h"
35 #include "AliAODCaloCluster.h"
36 #include "AliAODEvent.h"
38 ClassImp(AliAnaParticleJetFinderCorrelation)
41 //____________________________________________________________________________
42 AliAnaParticleJetFinderCorrelation::AliAnaParticleJetFinderCorrelation() :
43 AliAnaPartCorrBaseClass(),
44 fDeltaPhiMaxCut(0.), fDeltaPhiMinCut(0.), fRatioMaxCut(0.), fRatioMinCut(0.),
45 fConeSize(0), fPtThresholdInCone(0),fUseJetRefTracks(0), fMakeCorrelationInHistoMaker(0), fSelectIsolated(0),
46 fhDeltaEta(0), fhDeltaPhi(0), fhDeltaPt(0), fhPtRatio(0), fhPt(0),
47 fhFFz(0),fhFFxi(0),fhFFpt(0),fhNTracksInCone(0)
51 //Initialize parameters
55 //____________________________________________________________________________
56 AliAnaParticleJetFinderCorrelation::AliAnaParticleJetFinderCorrelation(const AliAnaParticleJetFinderCorrelation & pjf) :
57 AliAnaPartCorrBaseClass(pjf),
58 fDeltaPhiMaxCut(pjf.fDeltaPhiMaxCut), fDeltaPhiMinCut(pjf.fDeltaPhiMinCut),
59 fRatioMaxCut(pjf.fRatioMaxCut), fRatioMinCut(pjf.fRatioMinCut),
60 fConeSize(pjf.fConeSize), fPtThresholdInCone(pjf.fPtThresholdInCone),
61 fUseJetRefTracks(pjf.fUseJetRefTracks), fMakeCorrelationInHistoMaker(pjf.fMakeCorrelationInHistoMaker),
62 fSelectIsolated(pjf.fSelectIsolated),
63 fhDeltaEta(pjf.fhDeltaEta), fhDeltaPhi(pjf.fhDeltaPhi),
64 fhDeltaPt(pjf.fhDeltaPt), fhPtRatio(pjf.fhPtRatio), fhPt(pjf.fhPt),
65 fhFFz(pjf.fhFFz),fhFFxi(pjf.fhFFxi),fhFFpt(pjf.fhFFpt),
66 fhNTracksInCone(pjf.fhNTracksInCone)
72 //_________________________________________________________________________
73 AliAnaParticleJetFinderCorrelation & AliAnaParticleJetFinderCorrelation::operator = (const AliAnaParticleJetFinderCorrelation & pjf)
75 // assignment operator
77 if(this == &pjf)return *this;
78 ((AliAnaPartCorrBaseClass *)this)->operator=(pjf);
80 fDeltaPhiMaxCut = pjf.fDeltaPhiMaxCut ;
81 fDeltaPhiMinCut = pjf.fDeltaPhiMinCut ;
82 fRatioMaxCut = pjf.fRatioMaxCut ;
83 fRatioMinCut = pjf.fRatioMinCut ;
84 fConeSize = pjf.fConeSize ;
85 fPtThresholdInCone = pjf.fPtThresholdInCone ;
86 fUseJetRefTracks = pjf.fUseJetRefTracks ;
87 fMakeCorrelationInHistoMaker = pjf.fMakeCorrelationInHistoMaker ;
88 fSelectIsolated = pjf.fSelectIsolated ;
91 fhDeltaEta = pjf.fhDeltaEta;
92 fhDeltaPhi = pjf.fhDeltaPhi;
93 fhDeltaPt = pjf.fhDeltaPt;
94 fhPtRatio = pjf.fhPtRatio;
100 fhNTracksInCone = pjf.fhNTracksInCone;
106 //____________________________________________________________________________
107 //AliAnaParticleJetFinderCorrelation::~AliAnaParticleJetFinderCorrelation()
109 // // Remove all pointers except analysis output pointers.
114 //________________________________________________________________________
115 TList * AliAnaParticleJetFinderCorrelation::GetCreateOutputObjects()
117 // Create histograms to be saved in output file and
118 // store them in fOutputContainer
120 TList * outputContainer = new TList() ;
121 outputContainer->SetName("ParticleJetFinderHistos") ;
123 Int_t nptbins = GetHistoPtBins();
124 // Int_t nphibins = GetHistoPhiBins();
125 // Int_t netabins = GetHistoEtaBins();
126 Float_t ptmax = GetHistoPtMax();
127 // Float_t phimax = GetHistoPhiMax();
128 // Float_t etamax = GetHistoEtaMax();
129 Float_t ptmin = GetHistoPtMin();
130 // Float_t phimin = GetHistoPhiMin();
131 // Float_t etamin = GetHistoEtaMin();
133 fhDeltaPhi = new TH2F("DeltaPhi","#phi_{jet} - #phi_{trigger} vs p_{T trigger}",nptbins,ptmin,ptmax,100,-4,4);
134 fhDeltaPhi->SetYTitle("#Delta #phi");
135 fhDeltaPhi->SetXTitle("p_{T trigger} (GeV/c)");
136 outputContainer->Add(fhDeltaPhi);
138 fhDeltaEta = new TH2F("DeltaEta","#eta_{jet} - #eta_{trigger} vs p_{T trigger}",nptbins,ptmin,ptmax,100,-5,5);
139 fhDeltaEta->SetYTitle("#Delta #eta");
140 fhDeltaEta->SetXTitle("p_{T trigger} (GeV/c)");
141 outputContainer->Add(fhDeltaEta);
143 fhDeltaPt = new TH2F("DeltaPt","p_{T trigger} - #p_{T jet} vs p_{T trigger}",nptbins,ptmin,ptmax,100,-50,50);
144 fhDeltaPt->SetYTitle("#Delta #p_{T}");
145 fhDeltaPt->SetXTitle("p_{T trigger} (GeV/c)");
146 outputContainer->Add(fhDeltaPt);
148 fhPtRatio = new TH2F("PtRatio","p_{T jet} / #p_{T trigger} vs p_{T trigger}",nptbins,ptmin,ptmax,200,0,2.);
149 fhPtRatio->SetYTitle("ratio");
150 fhPtRatio->SetXTitle("p_{T trigger} (GeV/c)");
151 outputContainer->Add(fhPtRatio);
153 fhPt = new TH2F("Pt","p_{T jet} vs p_{T trigger}",nptbins,ptmin,ptmax,nptbins,ptmin,ptmax);
154 fhPt->SetYTitle("p_{T jet}(GeV/c)");
155 fhPt->SetXTitle("p_{T trigger} (GeV/c)");
156 outputContainer->Add(fhPt);
158 fhFFz = new TH2F("FFz","z = p_{T i charged}/p_{T trigger} vs p_{T trigger}",nptbins,ptmin,ptmax,200,0.,2);
159 fhFFz->SetYTitle("z");
160 fhFFz->SetXTitle("p_{T trigger}");
161 outputContainer->Add(fhFFz) ;
163 fhFFxi = new TH2F("FFxi","#xi = ln(p_{T trigger}/p_{T i charged}) vs p_{T trigger}", nptbins,ptmin,ptmax,100,0.,10.);
164 fhFFxi->SetYTitle("#xi");
165 fhFFxi->SetXTitle("p_{T trigger}");
166 outputContainer->Add(fhFFxi) ;
168 fhFFpt = new TH2F("FFpt","#xi = p_{T i charged}) vs p_{T trigger}", nptbins,ptmin,ptmax,100,0.,50.);
169 fhFFpt->SetYTitle("p_{T charged hadron}");
170 fhFFpt->SetXTitle("p_{T trigger}");
171 outputContainer->Add(fhFFpt) ;
173 fhNTracksInCone = new TH2F("NTracksInCone","#xi = p_{T i charged}) vs p_{T trigger}", nptbins,ptmin,ptmax,100,0.,50.);
174 fhNTracksInCone->SetYTitle("p_{T charged hadron}");
175 fhNTracksInCone->SetXTitle("p_{T trigger}");
176 outputContainer->Add(fhNTracksInCone) ;
178 return outputContainer;
182 //____________________________________________________________________________
183 void AliAnaParticleJetFinderCorrelation::InitParameters()
186 //Initialize the parameters of the analysis.
187 SetInputAODName("PWG4Particle");
188 AddToHistogramsName("AnaJetFinderCorr_");
190 fDeltaPhiMinCut = 1.5 ;
191 fDeltaPhiMaxCut = 4.5 ;
195 fPtThresholdInCone = 0.5 ;
196 fUseJetRefTracks = kFALSE ;
197 fMakeCorrelationInHistoMaker = kFALSE ;
198 fSelectIsolated = kFALSE;
201 //__________________________________________________________________
202 Int_t AliAnaParticleJetFinderCorrelation::SelectJet(AliAODPWG4Particle * particle, AliAODEvent *event) const
204 //Returns the index of the jet that is opposite to the particle
206 Int_t njets = event->GetNJets() ;
208 AliAODJet * jet = 0 ;
210 for(Int_t ijet = 0; ijet < njets ; ijet++){
211 jet = event->GetJet(ijet) ;
212 Float_t dphi = TMath::Abs(particle->Phi()-jet->Phi());
213 Float_t ratio = jet->Pt()/particle->Pt();
215 printf("AliAnaParticleJetFinderCorrelation::SelectJet() - Jet %d, Ratio pT %2.3f, Delta phi %2.3f\n",ijet,ratio,dphi);
216 Float_t dphiprev= 10000;
217 if((dphi > fDeltaPhiMinCut) && (dphi<fDeltaPhiMaxCut) &&
218 (ratio > fRatioMinCut) && (ratio < fRatioMaxCut) &&
219 (TMath::Abs(dphi-3.14159) < TMath::Abs(dphiprev-3.14159))){//In case there is more than one jet select the most opposite.
229 //__________________________________________________________________
230 void AliAnaParticleJetFinderCorrelation::MakeAnalysisFillAOD()
232 //Particle-Jet Correlation Analysis, fill AODs
234 //Get the event, check if there are AODs available, if not, skip this analysis
235 AliAODEvent * event = NULL;
236 if(GetReader()->GetOutputEvent())
238 event = dynamic_cast<AliAODEvent*>(GetReader()->GetOutputEvent());
240 else if(GetReader()->GetDataType() == AliCaloTrackReader::kAOD)
242 event = dynamic_cast<AliAODEvent*>(GetReader()->GetInputEvent());
246 if(GetDebug() > 3) printf("AliAnaParticleJetFinderCorrelation::MakeAnalysisFillAOD() - There are no jets available for this analysis\n");
250 if(!GetInputAODBranch() || !event){
251 printf("AliAnaParticleJetFinderCorrelation::MakeAnalysisFillAOD() - No input particles in AOD with name branch < %s > \n",GetInputAODName().Data());
255 if(strcmp(GetInputAODBranch()->GetClass()->GetName(), "AliAODPWG4ParticleCorrelation")){
256 printf("AliAnaParticleJetFinderCorrelation::MakeAnalysisFillAOD() - Wrong type of AOD object, change AOD class name in input AOD: It should be <AliAODPWG4ParticleCorrelation> and not <%s> \n",GetInputAODBranch()->GetClass()->GetName());
260 Int_t ntrig = GetInputAODBranch()->GetEntriesFast() ;
262 printf("AliAnaParticleJetFinderCorrelation::MakeAnalysisFillAOD() - Begin jet finder correlation analysis, fill AODs \n");
263 printf("AliAnaParticleJetFinderCorrelation::MakeAnalysisFillAOD() - In particle branch aod entries %d\n", ntrig);
264 printf("AliAnaParticleJetFinderCorrelation::MakeAnalysisFillAOD() - In jet branch aod entries %d\n", event->GetNJets());
267 //Loop on stored AOD particles, trigger
268 for(Int_t iaod = 0; iaod < ntrig ; iaod++){
269 AliAODPWG4ParticleCorrelation* particle = (AliAODPWG4ParticleCorrelation*) (GetInputAODBranch()->At(iaod));
271 //Correlate with jets
272 Int_t ijet = SelectJet(particle,event);
274 if(GetDebug() > 2) printf ("AliAnaParticleJetFinderCorrelation::MakeAnalysisFillAOD() - Jet with index %d selected \n",ijet);
275 AliAODJet *jet = event->GetJet(ijet);
276 particle->SetRefJet(jet);
280 if(GetDebug() > 1 ) printf("AliAnaParticleJetFinderCorrelation::MakeAnalysisFillAOD() - End fill AODs \n");
283 //__________________________________________________________________
284 void AliAnaParticleJetFinderCorrelation::MakeAnalysisFillHistograms()
286 //Particle-Jet Correlation Analysis, fill histograms
288 //Get the event, check if there are AODs available, if not, skip this analysis
289 AliAODEvent * event = NULL;
290 if(GetReader()->GetOutputEvent())
292 event = dynamic_cast<AliAODEvent*>(GetReader()->GetOutputEvent());
294 else if(GetReader()->GetDataType() == AliCaloTrackReader::kAOD)
296 event = dynamic_cast<AliAODEvent*>(GetReader()->GetInputEvent());
299 if(GetDebug() > 3) printf("AliAnaParticleJetFinderCorrelation::MakeAnalysisFillHistograms() - There are no jets available for this analysis\n");
303 if(!GetInputAODBranch() || !event){
304 printf("AliAnaParticleJetFinderCorrelation::MakeAnalysisFillHistograms() - No input particles in AOD with name branch < %s > \n",GetInputAODName().Data());
308 Int_t ntrig = GetInputAODBranch()->GetEntriesFast() ;
310 printf("AliAnaParticleJetFinderCorrelation::MakeAnalysisFillHistograms() - Begin jet finder correlation analysis, fill histograms \n");
311 printf("AliAnaParticleJetFinderCorrelation::MakeAnalysisFillHistograms() - In particle branch aod entries %d\n", ntrig);
312 printf("AliAnaParticleJetFinderCorrelation::MakeAnalysisFillHistograms() - In jet output branch aod entries %d\n", event->GetNJets());
315 //Loop on stored AOD particles, trigger
316 for(Int_t iaod = 0; iaod < ntrig ; iaod++){
317 AliAODPWG4ParticleCorrelation* particlecorr = (AliAODPWG4ParticleCorrelation*) (GetInputAODBranch()->At(iaod));
319 if(OnlyIsolated() && !particlecorr->IsIsolated()) continue;
321 //Recover the jet correlated, found previously.
322 AliAODJet * jet = particlecorr->GetJet();
323 //If correlation not made before, do it now.
324 if(fMakeCorrelationInHistoMaker){
325 //Correlate with jets
326 Int_t ijet = SelectJet(particlecorr,event);
328 if(GetDebug() > 2) printf ("AliAnaParticleJetFinderCorrelation::MakeAnalysisFillHistograms() - Jet with index %d selected \n",ijet);
329 jet = event->GetJet(ijet);
330 particlecorr->SetRefJet(jet);
338 Double_t ptTrig = particlecorr->Pt();
339 Double_t ptJet = jet->Pt();
340 Double_t phiTrig = particlecorr->Phi();
341 Double_t phiJet = jet->Phi();
342 Double_t etaTrig = particlecorr->Eta();
343 Double_t etaJet = jet->Eta();
344 //printf("pT trigger %2.3f, pT jet %2.3f, Delta phi %2.3f, Delta eta %2.3f, Delta pT %2.3f, ratio %2.3f \n",
345 // ptTrig,ptJet, phiJet-phiTrig, etaJet-etaTrig, ptTrig-ptJet, ptJet/ptTrig);
346 fhDeltaPt ->Fill(ptTrig, ptTrig-ptJet);
347 fhDeltaPhi->Fill(ptTrig, phiJet-phiTrig);
348 fhDeltaEta->Fill(ptTrig, etaJet-etaTrig);
349 fhPtRatio ->Fill(ptTrig, ptJet/ptTrig);
350 fhPt ->Fill(ptTrig, ptJet);
352 //Fragmentation function
353 Float_t rad = 0, pt = 0, eta = 0, phi = 0;
358 if(!fUseJetRefTracks)
359 ntracks =GetAODCTS()->GetEntriesFast();
360 else //If you want to use jet tracks from JETAN
361 ntracks = (jet->GetRefTracks())->GetEntriesFast();
363 AliAODTrack* track = 0x0 ;
364 for(Int_t ipr = 0;ipr < ntracks ; ipr ++ ){
365 if(!fUseJetRefTracks)
366 track = (AliAODTrack *) (GetAODCTS()->At(ipr)) ;
367 else //If you want to use jet tracks from JETAN
368 track = (AliAODTrack *) ((jet->GetRefTracks())->At(ipr));
370 p3.SetXYZ(track->Px(),track->Py(),track->Pz());
374 if(phi < 0) phi+=TMath::TwoPi();
376 //Check if there is any particle inside cone with pt larger than fPtThreshold
377 rad = TMath::Sqrt((eta-etaJet)*(eta-etaJet)+ (phi-phiJet)*(phi-phiJet));
378 if(rad < fConeSize && pt > fPtThresholdInCone){
379 //printf("charged in jet cone pt %f, phi %f, eta %f, R %f \n",pt,phi,eta,rad);
381 fhFFz ->Fill(ptTrig, pt/ptTrig);
382 fhFFxi->Fill(ptTrig, TMath::Log(ptTrig/pt));
383 fhFFpt->Fill(ptTrig, pt);
386 fhNTracksInCone->Fill(ptTrig, npartcone);
387 }//AOD trigger particle loop
388 if(GetDebug() > 1) printf("AliAnaParticleJetFinderCorrelation::MakeAnalysisFillHistograms() - End fill histograms \n");
392 //__________________________________________________________________
393 void AliAnaParticleJetFinderCorrelation::Print(const Option_t * opt) const
396 //Print some relevant parameters set for the analysis
400 printf("**** Print %s %s ****\n", GetName(), GetTitle() ) ;
401 AliAnaPartCorrBaseClass::Print(" ");
403 printf("Phi trigger-jet < %3.2f\n", fDeltaPhiMaxCut) ;
404 printf("Phi trigger-jet > %3.2f\n", fDeltaPhiMinCut) ;
405 printf("pT Ratio trigger/jet < %3.2f\n", fRatioMaxCut) ;
406 printf("pT Ratio trigger/jet > %3.2f\n", fRatioMinCut) ;
407 printf("fConeSize = %3.2f\n", fConeSize) ;
408 printf("fPtThresholdInCone = %3.2f\n", fPtThresholdInCone) ;
409 printf("fUseJetRefTracks = %d\n", fUseJetRefTracks) ;
410 printf("fMakeCorrelationInHistoMaker = %d\n", fMakeCorrelationInHistoMaker) ;
411 printf("Isolated Trigger? %d\n", fSelectIsolated) ;