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e0331fd9 | 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 | ||
16 | /* $Id:$ */ | |
17 | ||
18 | #include <TROOT.h> | |
19 | #include <TChain.h> | |
20 | #include <TFile.h> | |
21 | #include <TList.h> | |
22 | #include <TMath.h> | |
23 | #include <TTree.h> | |
24 | #include <TH2F.h> | |
25 | #include <TRandom.h> | |
2a910c25 | 26 | #include <TMCProcess.h> |
e0331fd9 | 27 | |
28 | #include "AliAnalysisTaskPhiCorrelations.h" | |
29 | #include "AliAnalyseLeadingTrackUE.h" | |
30 | #include "AliUEHistograms.h" | |
31 | #include "AliUEHist.h" | |
32 | ||
33 | #include "AliAnalysisHelperJetTasks.h" | |
34 | #include "AliAnalysisManager.h" | |
35 | #include "AliAODHandler.h" | |
36 | #include "AliAODInputHandler.h" | |
37 | #include "AliAODMCParticle.h" | |
38 | #include "AliGenPythiaEventHeader.h" | |
39 | #include "AliInputEventHandler.h" | |
40 | #include "AliLog.h" | |
41 | #include "AliMCEventHandler.h" | |
42 | #include "AliVParticle.h" | |
2a910c25 | 43 | #include "AliCFContainer.h" |
e0331fd9 | 44 | |
45 | #include "AliESDEvent.h" | |
46 | #include "AliESDInputHandler.h" | |
47 | #include "AliMultiplicity.h" | |
2a910c25 | 48 | #include "AliCentrality.h" |
49 | #include "AliStack.h" | |
e0331fd9 | 50 | |
2a910c25 | 51 | #include "AliEventPoolManager.h" |
e0331fd9 | 52 | |
53 | ||
54 | //////////////////////////////////////////////////////////////////////// | |
55 | // | |
56 | // Analysis class for azimuthal correlation studies | |
57 | // Based on the UE task from Sara Vallero and Jan Fiete | |
58 | // | |
59 | // This class needs input AODs. | |
60 | // The output is a list of analysis-specific containers. | |
61 | // | |
62 | // The AOD can be either connected to the InputEventHandler | |
63 | // for a chain of AOD files | |
64 | // or | |
65 | // to the OutputEventHandler | |
66 | // for a chain of ESD files, | |
67 | // in this case the class should be in the train after the jet-finder | |
68 | // | |
69 | // Authors: | |
70 | // Jan Fiete Grosse-Oetringhaus | |
71 | // | |
72 | //////////////////////////////////////////////////////////////////////// | |
73 | ||
74 | ||
75 | ClassImp( AliAnalysisTaskPhiCorrelations ) | |
76 | ||
77 | //____________________________________________________________________ | |
78 | AliAnalysisTaskPhiCorrelations:: AliAnalysisTaskPhiCorrelations(const char* name): | |
79 | AliAnalysisTask(name,""), | |
80 | // general configuration | |
81 | fDebug(0), | |
82 | fMode(0), | |
83 | fReduceMemoryFootprint(kFALSE), | |
84 | // pointers to UE classes | |
85 | fAnalyseUE(0x0), | |
86 | fHistos(0x0), | |
87 | fHistosMixed(0), | |
88 | fkTrackingEfficiency(0x0), | |
89 | // handlers and events | |
85bfac17 | 90 | fAOD(0x0), |
91 | fESD(0x0), | |
e0331fd9 | 92 | fArrayMC(0x0), |
93 | fInputHandler(0x0), | |
94 | fMcEvent(0x0), | |
95 | fMcHandler(0x0), | |
2a910c25 | 96 | fPoolMgr(0x0), |
e0331fd9 | 97 | // histogram settings |
98 | fListOfHistos(0x0), | |
99 | // event QA | |
100 | fnTracksVertex(1), // QA tracks pointing to principal vertex (= 3 default) | |
85bfac17 | 101 | fZVertex(7.), |
2a910c25 | 102 | fCentralityMethod("V0M"), |
e0331fd9 | 103 | // track cuts |
104 | fTrackEtaCut(0.8), | |
105 | fPtMin(0.5), | |
106 | fFilterBit(0xFF), | |
107 | fSelectBit(0), | |
2a910c25 | 108 | fUseChargeHadrons(kFALSE), |
109 | fSelectCharge(0) | |
e0331fd9 | 110 | { |
111 | // Default constructor | |
112 | // Define input and output slots here | |
113 | // Input slot #0 works with a TChain | |
114 | DefineInput(0, TChain::Class()); | |
115 | // Output slot #0 writes into a TList container | |
116 | DefineOutput(0, TList::Class()); | |
e0331fd9 | 117 | } |
118 | ||
119 | AliAnalysisTaskPhiCorrelations::~AliAnalysisTaskPhiCorrelations() | |
120 | { | |
121 | // destructor | |
122 | ||
123 | if (fListOfHistos && !AliAnalysisManager::GetAnalysisManager()->IsProofMode()) | |
124 | delete fListOfHistos; | |
125 | } | |
126 | ||
127 | //____________________________________________________________________ | |
128 | void AliAnalysisTaskPhiCorrelations::ConnectInputData(Option_t* /*option*/) | |
129 | { | |
130 | ||
131 | // Connect the input data | |
132 | if (fDebug > 1) AliInfo("ConnectInputData() "); | |
133 | ||
134 | // Since AODs can either be connected to the InputEventHandler | |
135 | // or to the OutputEventHandler ( the AOD is created by a previus task in the train ) | |
136 | // we need to get the pointer to the AODEvent correctly. | |
137 | ||
138 | // Delta AODs are also accepted. | |
139 | ||
140 | TObject* handler = AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler(); | |
141 | ||
85bfac17 | 142 | if( handler && handler->InheritsFrom("AliAODInputHandler") ) |
143 | { // input AOD | |
144 | fAOD = ((AliAODInputHandler*)handler)->GetEvent(); | |
145 | if (fDebug > 1) AliInfo(" ==== Tracks and Jets from AliAODInputHandler"); | |
146 | } | |
147 | else | |
148 | { //output AOD | |
149 | handler = AliAnalysisManager::GetAnalysisManager()->GetOutputEventHandler(); | |
150 | if (handler && handler->InheritsFrom("AliAODHandler") ) | |
151 | { | |
152 | fAOD = ((AliAODHandler*)handler)->GetAOD(); | |
153 | if (fDebug > 1) AliInfo(" ==== Tracks and Jets from AliAODHandler"); | |
154 | } | |
155 | else | |
156 | { // no AOD | |
157 | AliWarning("I can't get any AOD Event Handler"); | |
158 | } | |
159 | } | |
160 | ||
161 | if (handler && handler->InheritsFrom("AliESDInputHandler") ) | |
162 | { // input ESD | |
163 | // pointer received per event in ::Exec | |
164 | if (fDebug > 1) AliInfo(" ==== Tracks and Jets from AliESDInputHandler"); | |
165 | } | |
e0331fd9 | 166 | |
167 | // Initialize common pointers | |
168 | Initialize(); | |
e0331fd9 | 169 | } |
170 | ||
171 | //____________________________________________________________________ | |
172 | void AliAnalysisTaskPhiCorrelations::CreateOutputObjects() | |
173 | { | |
174 | // Create the output container | |
175 | ||
176 | if (fDebug > 1) AliInfo("CreateOutputObjects()"); | |
177 | ||
178 | // Initialize class with main algorithms, event and track selection. | |
179 | fAnalyseUE = new AliAnalyseLeadingTrackUE(); | |
2a910c25 | 180 | fAnalyseUE->SetParticleSelectionCriteria(fFilterBit, fUseChargeHadrons, fTrackEtaCut, fPtMin); |
e0331fd9 | 181 | fAnalyseUE->SetDebug(fDebug); |
85bfac17 | 182 | fAnalyseUE->DefineESDCuts(fFilterBit); |
e0331fd9 | 183 | |
184 | // Initialize output list of containers | |
185 | if (fListOfHistos != NULL){ | |
186 | delete fListOfHistos; | |
187 | fListOfHistos = NULL; | |
188 | } | |
189 | if (!fListOfHistos){ | |
190 | fListOfHistos = new TList(); | |
191 | fListOfHistos->SetOwner(kTRUE); | |
192 | } | |
193 | ||
194 | // Initialize class to handle histograms | |
195 | fHistos = new AliUEHistograms("AliUEHistogramsSame", "4"); | |
196 | fHistosMixed = new AliUEHistograms("AliUEHistogramsMixed", "4"); | |
197 | ||
2a910c25 | 198 | fHistos->SetSelectCharge(fSelectCharge); |
199 | fHistosMixed->SetSelectCharge(fSelectCharge); | |
200 | ||
e0331fd9 | 201 | // add histograms to list |
202 | fListOfHistos->Add(fHistos); | |
203 | fListOfHistos->Add(fHistosMixed); | |
204 | ||
2a910c25 | 205 | fListOfHistos->Add(new TH2F("trackletsVsV0Cent", ";L1 clusters;v0 centrality", 100, -0.5, 9999.5, 101, 0, 101)); |
206 | fListOfHistos->Add(new TH2F("processIDs", ";#Delta#phi;process id", 100, -0.5 * TMath::Pi(), 1.5 * TMath::Pi(), kPNoProcess + 1, -0.5, kPNoProcess + 0.5)); | |
e0331fd9 | 207 | |
208 | // Add task configuration to output list | |
209 | AddSettingsTree(); | |
210 | ||
2a910c25 | 211 | // event mixing |
212 | // Int_t trackDepth = 100; // Require e.g. 20 5-track events, or 2 50-track events | |
85bfac17 | 213 | Int_t trackDepth = 5000; // Require e.g. 20 5-track events, or 2 50-track events |
2a910c25 | 214 | Int_t poolsize = 100; // Maximum number of events |
215 | ||
216 | Int_t nCentralityBins = fHistos->GetUEHist(2)->GetEventHist()->GetNBins(1); | |
217 | Double_t* centralityBins = (Double_t*) fHistos->GetUEHist(2)->GetEventHist()->GetAxis(1, 0)->GetXbins()->GetArray(); | |
218 | ||
85bfac17 | 219 | Int_t nZvtxBins = fHistos->GetUEHist(2)->GetEventHist()->GetNBins(2); |
220 | Double_t* zvtxbin = (Double_t*) fHistos->GetUEHist(2)->GetEventHist()->GetAxis(2, 0)->GetXbins()->GetArray(); | |
221 | ||
2a910c25 | 222 | fPoolMgr = new AliEventPoolManager(poolsize, trackDepth, nCentralityBins, centralityBins, nZvtxBins, zvtxbin); |
59064365 | 223 | |
224 | delete[] zvtxbin; | |
e0331fd9 | 225 | } |
226 | ||
227 | //____________________________________________________________________ | |
228 | void AliAnalysisTaskPhiCorrelations::Exec(Option_t */*option*/) | |
229 | { | |
230 | // array of MC particles | |
85bfac17 | 231 | if (fMcHandler) { |
232 | if (fAOD) | |
233 | { | |
234 | fArrayMC = dynamic_cast<TClonesArray*>(fAOD->FindListObject(AliAODMCParticle::StdBranchName())); | |
235 | if (!fArrayMC) | |
236 | AliFatal("No array of MC particles found !!!"); | |
237 | } | |
2a910c25 | 238 | fMcEvent = fMcHandler->MCEvent(); |
239 | } | |
e0331fd9 | 240 | |
85bfac17 | 241 | // receive ESD pointer if we are not running AOD analysis |
242 | if (!fAOD) | |
243 | { | |
244 | AliVEventHandler* handler = AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler(); | |
245 | if (handler && handler->InheritsFrom("AliESDInputHandler")) | |
246 | fESD = ((AliESDInputHandler*)handler)->GetEvent(); | |
247 | } | |
248 | ||
e0331fd9 | 249 | // Analyse the event |
250 | if (fMode) AnalyseCorrectionMode(); | |
251 | else AnalyseDataMode(); | |
252 | ||
253 | PostData(0,fListOfHistos); | |
254 | } | |
255 | ||
256 | /******************** ANALYSIS METHODS *****************************/ | |
257 | ||
258 | //____________________________________________________________________ | |
259 | void AliAnalysisTaskPhiCorrelations::AddSettingsTree() | |
260 | { | |
261 | //Write settings to output list | |
262 | TTree *settingsTree = new TTree("UEAnalysisSettings","Analysis Settings in UE estimation"); | |
263 | settingsTree->Branch("fFilterBit", &fFilterBit,"FilterBit/I"); | |
264 | settingsTree->Branch("fSelectBit", &fSelectBit,"EventSelectionBit/I"); | |
265 | settingsTree->Branch("fTrackEtaCut", &fTrackEtaCut, "TrackEtaCut/D"); | |
266 | settingsTree->Branch("fPtMin", &fPtMin, "PtMin/D"); | |
267 | settingsTree->Branch("fUseChargeHadrons", &fUseChargeHadrons,"UseChHadrons/O"); | |
268 | settingsTree->Branch("fkTrackingEfficiency", "TH1D", &fkTrackingEfficiency); | |
269 | settingsTree->Fill(); | |
270 | fListOfHistos->Add(settingsTree); | |
271 | } | |
272 | ||
273 | //____________________________________________________________________ | |
274 | void AliAnalysisTaskPhiCorrelations::AnalyseCorrectionMode() | |
275 | { | |
276 | // Run the analysis on MC to get the correction maps | |
277 | // | |
278 | ||
2a910c25 | 279 | if ( fDebug > 3 ) AliInfo( " Processing event in Corrections mode ..." ); |
280 | ||
281 | Double_t centrality = 0; | |
282 | ||
283 | if (fCentralityMethod.Length() > 0) | |
284 | { | |
85bfac17 | 285 | AliCentrality *centralityObj = 0; |
286 | if (fAOD) | |
287 | centralityObj = fAOD->GetHeader()->GetCentralityP(); | |
288 | else if (fESD) | |
289 | centralityObj = fESD->GetCentrality(); | |
290 | ||
2a910c25 | 291 | if (centralityObj) |
292 | { | |
293 | centrality = centralityObj->GetCentralityPercentileUnchecked(fCentralityMethod); | |
294 | Printf("Centrality is %f", centrality); | |
295 | } | |
296 | else | |
297 | { | |
298 | Printf("WARNING: Centrality object is 0"); | |
299 | centrality = -1; | |
300 | } | |
301 | } | |
302 | ||
85bfac17 | 303 | // Support for ESD and AOD based analysis |
304 | AliVEvent* inputEvent = fAOD; | |
305 | if (!inputEvent) | |
306 | inputEvent = fESD; | |
307 | ||
308 | TObject* mc = fArrayMC; | |
309 | if (!mc) | |
310 | mc = fMcEvent; | |
311 | ||
2a910c25 | 312 | // count all events |
313 | fHistos->FillEvent(centrality, -1); | |
314 | ||
315 | // Only consider MC events within the vtx-z region used also as cut on the reconstructed vertex | |
316 | if (!fAnalyseUE->VertexSelection(fMcEvent, 0, fZVertex)) | |
317 | return; | |
85bfac17 | 318 | |
319 | Float_t zVtx = fMcEvent->GetPrimaryVertex()->GetZ(); | |
2a910c25 | 320 | |
321 | // Get MC primaries | |
85bfac17 | 322 | TObjArray* tracksMC = fAnalyseUE->GetAcceptedParticles(mc, 0, kTRUE, -1, kTRUE); |
2a910c25 | 323 | |
324 | // (MC-true all particles) | |
325 | // STEP 0 | |
85bfac17 | 326 | fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepAll, tracksMC); |
2a910c25 | 327 | |
328 | // Trigger selection ************************************************ | |
329 | if (fAnalyseUE->TriggerSelection(fInputHandler)) | |
330 | { | |
331 | fHistos->FillEvent(centrality, AliUEHist::kCFStepTriggered); | |
332 | ||
333 | // Vertex selection ************************************************* | |
85bfac17 | 334 | if (fAnalyseUE->VertexSelection(inputEvent, fnTracksVertex, fZVertex)) |
2a910c25 | 335 | { |
336 | // fill here for tracking efficiency | |
337 | // loop over particle species | |
338 | ||
339 | for (Int_t particleSpecies = 0; particleSpecies < 4; particleSpecies++) | |
340 | { | |
85bfac17 | 341 | TObjArray* primMCParticles = fAnalyseUE->GetAcceptedParticles(mc, 0x0, kTRUE, particleSpecies, kTRUE); |
342 | TObjArray* primRecoTracksMatched = fAnalyseUE->GetAcceptedParticles(inputEvent, mc, kTRUE, particleSpecies, kTRUE); | |
343 | TObjArray* allRecoTracksMatched = fAnalyseUE->GetAcceptedParticles(inputEvent, mc, kFALSE, particleSpecies, kTRUE); | |
2a910c25 | 344 | |
345 | fHistos->FillTrackingEfficiency(primMCParticles, primRecoTracksMatched, allRecoTracksMatched, particleSpecies, centrality); | |
346 | ||
347 | delete primMCParticles; | |
348 | delete primRecoTracksMatched; | |
349 | delete allRecoTracksMatched; | |
350 | } | |
351 | ||
352 | // (MC-true all particles) | |
353 | // STEP 2 | |
85bfac17 | 354 | if (!fReduceMemoryFootprint) |
355 | fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepVertex, tracksMC); | |
2a910c25 | 356 | |
357 | // Get MC primaries that match reconstructed track | |
85bfac17 | 358 | TObjArray* tracksRecoMatchedPrim = fAnalyseUE->GetAcceptedParticles(inputEvent, mc, kTRUE, -1, kTRUE); |
2a910c25 | 359 | |
360 | // (RECO-matched (quantities from MC particle) primary particles) | |
361 | // STEP 4 | |
85bfac17 | 362 | fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepTrackedOnlyPrim, tracksRecoMatchedPrim); |
2a910c25 | 363 | |
364 | // Get MC primaries + secondaries that match reconstructed track | |
85bfac17 | 365 | TObjArray* tracksRecoMatchedAll = fAnalyseUE->GetAcceptedParticles(inputEvent, mc, kFALSE, -1, kTRUE); |
2a910c25 | 366 | |
367 | // (RECO-matched (quantities from MC particle) all particles) | |
368 | // STEP 5 | |
85bfac17 | 369 | fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepTracked, tracksRecoMatchedAll); |
2a910c25 | 370 | |
371 | // Get RECO tracks | |
85bfac17 | 372 | TObjArray* tracks = fAnalyseUE->GetAcceptedParticles(inputEvent, 0, kTRUE, -1, kTRUE); |
2a910c25 | 373 | |
374 | // (RECO all tracks) | |
375 | // STEP 6 | |
85bfac17 | 376 | fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepReconstructed, tracks); |
2a910c25 | 377 | |
85bfac17 | 378 | if (0 && !fReduceMemoryFootprint) |
2a910c25 | 379 | { |
380 | // make list of secondaries (matched with MC) | |
381 | TObjArray* tracksRecoMatchedSecondaries = new TObjArray; | |
382 | for (Int_t i=0; i<tracksRecoMatchedAll->GetEntries(); i++) | |
383 | if (((AliAODMCParticle*)tracksRecoMatchedAll->At(i))->IsPhysicalPrimary() == kFALSE) | |
384 | tracksRecoMatchedSecondaries->Add(tracksRecoMatchedAll->At(i)); | |
385 | ||
386 | // Study: Use only secondaries as trigger particles and plot the correlation vs. all particles; store in step 9 | |
85bfac17 | 387 | fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepBiasStudy2, tracksRecoMatchedSecondaries, tracksRecoMatchedAll); |
2a910c25 | 388 | |
389 | // Study: Use only primaries as trigger particles and plot the correlation vs. secondaries; store in step 8 | |
85bfac17 | 390 | fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepBiasStudy, tracksRecoMatchedPrim, tracksRecoMatchedSecondaries); |
2a910c25 | 391 | |
392 | // plot delta phi vs process id of secondaries | |
393 | // trigger particles: primaries in 4 < pT < 10 | |
394 | // associated particles: secondaries in 1 < pT < 10 | |
395 | ||
396 | for (Int_t i=0; i<tracksRecoMatchedPrim->GetEntries(); i++) | |
397 | { | |
398 | AliVParticle* triggerParticle = (AliVParticle*) tracksRecoMatchedPrim->At(i); | |
399 | ||
400 | if (triggerParticle->Pt() < 4 || triggerParticle->Pt() > 10) | |
401 | continue; | |
402 | ||
403 | for (Int_t j=0; j<tracksRecoMatchedSecondaries->GetEntries(); j++) | |
404 | { | |
405 | AliAODMCParticle* particle = (AliAODMCParticle*) tracksRecoMatchedSecondaries->At(j); | |
406 | ||
407 | if (particle->Pt() < 1 || particle->Pt() > 10) | |
408 | continue; | |
409 | ||
410 | if (particle->Pt() > triggerParticle->Pt()) | |
411 | continue; | |
412 | ||
413 | Double_t deltaPhi = triggerParticle->Phi() - particle->Phi(); | |
414 | if (deltaPhi > 1.5 * TMath::Pi()) | |
415 | deltaPhi -= TMath::TwoPi(); | |
416 | if (deltaPhi < -0.5 * TMath::Pi()) | |
417 | deltaPhi += TMath::TwoPi(); | |
418 | ||
419 | Int_t processID = fMcEvent->Stack()->Particle(particle->GetLabel())->GetUniqueID(); | |
420 | ||
421 | ((TH2F*) fListOfHistos->FindObject("processIDs"))->Fill(deltaPhi, processID); | |
422 | } | |
423 | } | |
424 | ||
425 | delete tracksRecoMatchedSecondaries; | |
426 | } | |
427 | ||
428 | delete tracksRecoMatchedPrim; | |
429 | delete tracksRecoMatchedAll; | |
430 | delete tracks; | |
431 | } | |
432 | } | |
433 | ||
434 | delete tracksMC; | |
e0331fd9 | 435 | } |
436 | ||
437 | //____________________________________________________________________ | |
438 | void AliAnalysisTaskPhiCorrelations::AnalyseDataMode() | |
439 | { | |
440 | ||
441 | // Run the analysis on DATA or MC to get raw distributions | |
442 | ||
e0331fd9 | 443 | if ( fDebug > 3 ) AliInfo( " Processing event in Data mode ..." ); |
e0331fd9 | 444 | |
2a910c25 | 445 | // skip not selected events here (the AOD is not updated for those) |
446 | if (!fInputHandler) | |
447 | return; | |
448 | ||
85bfac17 | 449 | if (!(fInputHandler->IsEventSelected() & (AliVEvent::kMB | AliVEvent::kUserDefined))) |
2a910c25 | 450 | return; |
e0331fd9 | 451 | |
2a910c25 | 452 | Double_t centrality = 0; |
453 | ||
454 | if (fCentralityMethod.Length() > 0) | |
455 | { | |
85bfac17 | 456 | AliCentrality *centralityObj = 0; |
457 | if (fAOD) | |
458 | centralityObj = fAOD->GetHeader()->GetCentralityP(); | |
459 | else if (fESD) | |
460 | centralityObj = fESD->GetCentrality(); | |
461 | ||
2a910c25 | 462 | if (centralityObj) |
463 | centrality = centralityObj->GetCentralityPercentile(fCentralityMethod); | |
464 | //centrality = centralityObj->GetCentralityPercentileUnchecked(fCentralityMethod); | |
465 | else | |
466 | centrality = -1; | |
467 | Printf("Centrality is %f", centrality); | |
468 | } | |
469 | ||
85bfac17 | 470 | // Support for ESD and AOD based analysis |
471 | AliVEvent* inputEvent = fAOD; | |
472 | if (!inputEvent) | |
473 | inputEvent = fESD; | |
474 | ||
475 | fHistos->SetRunNumber(inputEvent->GetRunNumber()); | |
476 | ||
2a910c25 | 477 | // Fill the "event-counting-container", it is needed to get the number of events remaining after each event-selection cut |
478 | fHistos->FillEvent(centrality, AliUEHist::kCFStepAll); | |
479 | ||
e0331fd9 | 480 | // Trigger selection ************************************************ |
481 | if (!fAnalyseUE->TriggerSelection(fInputHandler)) return; | |
482 | ||
483 | // Fill the "event-counting-container", it is needed to get the number of events remaining after each event-selection cut | |
2a910c25 | 484 | fHistos->FillEvent(centrality, AliUEHist::kCFStepTriggered); |
e0331fd9 | 485 | |
486 | // Vertex selection ************************************************* | |
85bfac17 | 487 | if(!fAnalyseUE->VertexSelection(inputEvent, fnTracksVertex, fZVertex)) return; |
e0331fd9 | 488 | |
489 | // Fill the "event-counting-container", it is needed to get the number of events remaining after each event-selection cut | |
2a910c25 | 490 | fHistos->FillEvent(centrality, AliUEHist::kCFStepVertex); |
e0331fd9 | 491 | |
2a910c25 | 492 | if (centrality < 0) |
493 | return; | |
e0331fd9 | 494 | |
85bfac17 | 495 | TObjArray* tracks = fAnalyseUE->GetAcceptedParticles(inputEvent, 0, kTRUE, -1, kTRUE); |
2a910c25 | 496 | //Printf("Accepted %d tracks", tracks->GetEntries()); |
e0331fd9 | 497 | |
2a910c25 | 498 | // event mixing |
e0331fd9 | 499 | |
2a910c25 | 500 | // 1. First get an event pool corresponding in mult (cent) and |
501 | // zvertex to the current event. Once initialized, the pool | |
502 | // should contain nMix (reduced) events. This routine does not | |
503 | // pre-scan the chain. The first several events of every chain | |
504 | // will be skipped until the needed pools are filled to the | |
505 | // specified depth. If the pool categories are not too rare, this | |
506 | // should not be a problem. If they are rare, you could lose | |
507 | // statistics. | |
508 | ||
509 | // 2. Collect the whole pool's content of tracks into one TObjArray | |
510 | // (bgTracks), which is effectively a single background super-event. | |
511 | ||
512 | // 3. The reduced and bgTracks arrays must both be passed into | |
513 | // FillCorrelations(). Also nMix should be passed in, so a weight | |
514 | // of 1./nMix can be applied. | |
515 | ||
85bfac17 | 516 | const AliVVertex* vertex = inputEvent->GetPrimaryVertex(); |
2a910c25 | 517 | Double_t zVtx = vertex->GetZ(); |
518 | ||
519 | AliEventPool* pool = fPoolMgr->GetEventPool(centrality, zVtx); | |
520 | ||
521 | if (!pool) | |
522 | AliFatal(Form("No pool found for centrality = %f, zVtx = %f", centrality, zVtx)); | |
523 | ||
524 | //pool->SetDebug(1); | |
e0331fd9 | 525 | |
2a910c25 | 526 | // Fill containers at STEP 6 (reconstructed) |
85bfac17 | 527 | fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepReconstructed, tracks); |
2a910c25 | 528 | |
529 | if (pool->IsReady()) | |
e0331fd9 | 530 | { |
2a910c25 | 531 | |
532 | Int_t nMix = pool->GetCurrentNEvents(); | |
533 | //cout << "nMix = " << nMix << endl; | |
534 | ||
535 | // Fill mixed-event histos here | |
536 | for (Int_t jMix=0; jMix<nMix; jMix++) { | |
537 | TObjArray* bgTracks = pool->GetEvent(jMix); | |
85bfac17 | 538 | fHistosMixed->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepReconstructed, tracks, bgTracks, 1.0 / nMix, (jMix == 0)); |
e0331fd9 | 539 | } |
540 | } | |
541 | ||
2a910c25 | 542 | // clone and give ownership to event pool |
543 | TObjArray* tracksClone = (TObjArray*) tracks->Clone(); | |
544 | tracksClone->SetOwner(kTRUE); | |
545 | ||
546 | pool->UpdatePool(tracksClone); | |
547 | //pool->PrintInfo(); | |
548 | ||
e0331fd9 | 549 | delete tracks; |
e0331fd9 | 550 | } |
551 | ||
552 | //____________________________________________________________________ | |
553 | void AliAnalysisTaskPhiCorrelations::Initialize() | |
554 | { | |
555 | // input handler | |
556 | fInputHandler = (AliInputEventHandler*) | |
557 | ((AliAnalysisManager::GetAnalysisManager())->GetInputEventHandler()); | |
558 | // MC handler | |
559 | fMcHandler = dynamic_cast<AliMCEventHandler*> (AliAnalysisManager::GetAnalysisManager()->GetMCtruthEventHandler()); | |
560 | } |