1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
27 #include "AliAnalysisTaskPhiCorrelations.h"
28 #include "AliAnalyseLeadingTrackUE.h"
29 #include "AliUEHistograms.h"
30 #include "AliUEHist.h"
32 #include "AliAnalysisManager.h"
33 #include "AliAODHandler.h"
34 #include "AliAODInputHandler.h"
35 #include "AliAODMCParticle.h"
36 #include "AliInputEventHandler.h"
38 #include "AliMCEventHandler.h"
39 #include "AliVParticle.h"
40 #include "AliCFContainer.h"
42 #include "AliESDEvent.h"
43 #include "AliESDInputHandler.h"
44 #include "AliMultiplicity.h"
45 #include "AliCentrality.h"
47 #include "AliAODMCHeader.h"
48 #include "AliGenCocktailEventHeader.h"
49 #include "AliGenEventHeader.h"
51 #include "AliEventPoolManager.h"
53 #include "AliESDZDC.h"
56 ////////////////////////////////////////////////////////////////////////
58 // Analysis class for azimuthal correlation studies
59 // Based on the UE task from Sara Vallero and Jan Fiete
61 // This class needs input AODs.
62 // The output is a list of analysis-specific containers.
64 // The AOD can be either connected to the InputEventHandler
65 // for a chain of AOD files
67 // to the OutputEventHandler
68 // for a chain of ESD files,
69 // in this case the class should be in the train after the jet-finder
72 // Jan Fiete Grosse-Oetringhaus
74 ////////////////////////////////////////////////////////////////////////
77 ClassImp( AliAnalysisTaskPhiCorrelations )
78 ClassImp( AliDPhiBasicParticle )
80 //____________________________________________________________________
81 AliAnalysisTaskPhiCorrelations:: AliAnalysisTaskPhiCorrelations(const char* name):
82 AliAnalysisTask(name,""),
83 // general configuration
86 fReduceMemoryFootprint(kFALSE),
89 fCompareCentralities(kFALSE),
90 fTwoTrackEfficiencyStudy(kFALSE),
91 fTwoTrackEfficiencyCut(0),
93 fCourseCentralityBinning(kFALSE),
95 fInjectedSignals(kFALSE),
96 // pointers to UE classes
100 fkTrackingEfficiency(0x0),
101 // handlers and events
109 // histogram settings
112 fnTracksVertex(1), // QA tracks pointing to principal vertex (= 3 default)
114 fCentralityMethod("V0M"),
120 fSelectBit(AliVEvent::kMB|AliVEvent::kUserDefined),
121 fUseChargeHadrons(kFALSE),
123 fTriggerSelectCharge(0),
124 fTriggerRestrictEta(-1),
125 fEtaOrdering(kFALSE),
126 fCutConversions(kFALSE),
127 fCutResonances(kFALSE),
128 fFillOnlyStep0(kFALSE),
130 fRejectCentralityOutliers(kFALSE),
133 // Default constructor
134 // Define input and output slots here
135 // Input slot #0 works with a TChain
136 DefineInput(0, TChain::Class());
137 // Output slot #0 writes into a TList container
138 DefineOutput(0, TList::Class());
141 AliAnalysisTaskPhiCorrelations::~AliAnalysisTaskPhiCorrelations()
145 if (fListOfHistos && !AliAnalysisManager::GetAnalysisManager()->IsProofMode())
146 delete fListOfHistos;
149 //____________________________________________________________________
150 void AliAnalysisTaskPhiCorrelations::ConnectInputData(Option_t* /*option*/)
153 // Connect the input data
154 if (fDebug > 1) AliInfo("ConnectInputData() ");
156 // Since AODs can either be connected to the InputEventHandler
157 // or to the OutputEventHandler ( the AOD is created by a previus task in the train )
158 // we need to get the pointer to the AODEvent correctly.
160 // Delta AODs are also accepted.
162 TObject* handler = AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler();
164 if( handler && handler->InheritsFrom("AliAODInputHandler") )
166 fAOD = ((AliAODInputHandler*)handler)->GetEvent();
167 if (fDebug > 1) AliInfo(" ==== Tracks and Jets from AliAODInputHandler");
171 handler = AliAnalysisManager::GetAnalysisManager()->GetOutputEventHandler();
172 if (handler && handler->InheritsFrom("AliAODHandler") )
174 fAOD = ((AliAODHandler*)handler)->GetAOD();
175 if (fDebug > 1) AliInfo(" ==== Tracks and Jets from AliAODHandler");
179 AliWarning("I can't get any AOD Event Handler");
183 if (handler && handler->InheritsFrom("AliESDInputHandler") )
185 // pointer received per event in ::Exec
186 if (fDebug > 1) AliInfo(" ==== Tracks and Jets from AliESDInputHandler");
189 // Initialize common pointers
193 //____________________________________________________________________
194 void AliAnalysisTaskPhiCorrelations::CreateOutputObjects()
196 // Create the output container
198 if (fDebug > 1) AliInfo("CreateOutputObjects()");
200 // Initialize class with main algorithms, event and track selection.
201 fAnalyseUE = new AliAnalyseLeadingTrackUE();
202 fAnalyseUE->SetParticleSelectionCriteria(fFilterBit, fUseChargeHadrons, fTrackEtaCut, fPtMin);
203 fAnalyseUE->SetDebug(fDebug);
204 fAnalyseUE->DefineESDCuts(fFilterBit);
205 fAnalyseUE->SetEventSelection(fSelectBit);
207 // Initialize output list of containers
208 if (fListOfHistos != NULL){
209 delete fListOfHistos;
210 fListOfHistos = NULL;
213 fListOfHistos = new TList();
214 fListOfHistos->SetOwner(kTRUE);
217 // Initialize class to handle histograms
218 TString histType = "4R";
221 if (fCourseCentralityBinning)
223 fHistos = new AliUEHistograms("AliUEHistogramsSame", histType);
224 fHistosMixed = new AliUEHistograms("AliUEHistogramsMixed", histType);
226 fHistos->SetSelectCharge(fSelectCharge);
227 fHistosMixed->SetSelectCharge(fSelectCharge);
229 fHistos->SetSelectTriggerCharge(fTriggerSelectCharge);
230 fHistosMixed->SetSelectTriggerCharge(fTriggerSelectCharge);
232 fHistos->SetTriggerRestrictEta(fTriggerRestrictEta);
233 fHistosMixed->SetTriggerRestrictEta(fTriggerRestrictEta);
235 fHistos->SetOnlyOneEtaSide(fOnlyOneEtaSide);
236 fHistosMixed->SetOnlyOneEtaSide(fOnlyOneEtaSide);
238 fHistos->SetEtaOrdering(fEtaOrdering);
239 fHistosMixed->SetEtaOrdering(fEtaOrdering);
241 fHistos->SetPairCuts(fCutConversions, fCutResonances);
242 fHistosMixed->SetPairCuts(fCutConversions, fCutResonances);
244 // add histograms to list
245 fListOfHistos->Add(fHistos);
246 fListOfHistos->Add(fHistosMixed);
248 fListOfHistos->Add(new TH2F("trackletsVsV0Cent", ";L1 clusters;v0 centrality", 100, -0.5, 9999.5, 101, 0, 101));
249 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));
250 fListOfHistos->Add(new TH1F("eventStat", ";;events", 4, -0.5, 3.5));
251 fListOfHistos->Add(new TH2F("mixedDist", ";centrality;tracks;events", 101, 0, 101, 200, 0, fMixingTracks * 1.5));
252 fListOfHistos->Add(new TH1F("pids", ";pdg;tracks", 2001, -1000.5, 1000.5));
254 PostData(0,fListOfHistos);
256 // Add task configuration to output list
260 Int_t trackDepth = fMixingTracks;
261 Int_t poolsize = 1000; // Maximum number of events, ignored in the present implemented of AliEventPoolManager
263 Int_t nCentralityBins = fHistos->GetUEHist(2)->GetEventHist()->GetNBins(1);
264 Double_t* centralityBins = (Double_t*) fHistos->GetUEHist(2)->GetEventHist()->GetAxis(1, 0)->GetXbins()->GetArray();
266 Int_t nZvtxBins = 7+1+7;
267 // bins for second buffer are shifted by 100 cm
268 Double_t vertexBins[] = { -7, -5, -3, -1, 1, 3, 5, 7, 93, 95, 97, 99, 101, 103, 105, 107 };
269 Double_t* zvtxbin = vertexBins;
271 if (fHistos->GetUEHist(2)->GetEventHist()->GetNVar() > 2)
273 nZvtxBins = fHistos->GetUEHist(2)->GetEventHist()->GetNBins(2);
274 zvtxbin = (Double_t*) fHistos->GetUEHist(2)->GetEventHist()->GetAxis(2, 0)->GetXbins()->GetArray();
277 fPoolMgr = new AliEventPoolManager(poolsize, trackDepth, nCentralityBins, centralityBins, nZvtxBins, zvtxbin);
280 //____________________________________________________________________
281 void AliAnalysisTaskPhiCorrelations::Exec(Option_t */*option*/)
283 // receive ESD pointer if we are not running AOD analysis
286 AliVEventHandler* handler = AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler();
287 if (handler && handler->InheritsFrom("AliESDInputHandler"))
288 fESD = ((AliESDInputHandler*)handler)->GetEvent();
296 fMcEvent = fMcHandler->MCEvent();
300 // array of MC particles
301 fArrayMC = dynamic_cast<TClonesArray*>(fAOD->FindListObject(AliAODMCParticle::StdBranchName()));
303 AliFatal("No array of MC particles found !!!");
306 AnalyseCorrectionMode();
308 else AnalyseDataMode();
311 /******************** ANALYSIS METHODS *****************************/
313 //____________________________________________________________________
314 void AliAnalysisTaskPhiCorrelations::AddSettingsTree()
316 //Write settings to output list
317 TTree *settingsTree = new TTree("UEAnalysisSettings","Analysis Settings in UE estimation");
318 settingsTree->Branch("fnTracksVertex", &fnTracksVertex,"nTracksVertex/I");
319 settingsTree->Branch("fZVertex", &fZVertex,"ZVertex/D");
320 //settingsTree->Branch("fCentralityMethod", fCentralityMethod.Data(),"CentralityMethod/C");
321 settingsTree->Branch("fTrackEtaCut", &fTrackEtaCut, "TrackEtaCut/D");
322 settingsTree->Branch("fOnlyOneEtaSide", &fOnlyOneEtaSide,"OnlyOneEtaSide/I");
323 settingsTree->Branch("fPtMin", &fPtMin, "PtMin/D");
324 settingsTree->Branch("fFilterBit", &fFilterBit,"FilterBit/I");
325 settingsTree->Branch("fSelectBit", &fSelectBit,"EventSelectionBit/I");
326 settingsTree->Branch("fUseChargeHadrons", &fUseChargeHadrons,"UseChHadrons/O");
327 settingsTree->Branch("fSelectCharge", &fSelectCharge,"SelectCharge/I");
328 settingsTree->Branch("fTriggerSelectCharge", &fTriggerSelectCharge,"TriggerSelectCharge/I");
329 settingsTree->Branch("fTriggerRestrictEta", &fTriggerRestrictEta,"TriggerRestrictEta/D");
330 settingsTree->Branch("fEtaOrdering", &fEtaOrdering,"EtaOrdering/O");
331 settingsTree->Branch("fCutConversions", &fCutConversions,"CutConversions/O");
332 settingsTree->Branch("fCutResonances", &fCutResonances,"CutResonances/O");
333 settingsTree->Branch("fFillpT", &fFillpT,"FillpT/O");
334 settingsTree->Branch("fkTrackingEfficiency", "TH1D", &fkTrackingEfficiency);
335 settingsTree->Branch("fMixingTracks", &fMixingTracks,"MixingTracks/I");
336 settingsTree->Branch("fSkipTrigger", &fSkipTrigger,"SkipTrigger/O");
337 settingsTree->Branch("fInjectedSignals", &fInjectedSignals,"SkipTrigger/O");
338 settingsTree->Branch("fRejectCentralityOutliers", &fRejectCentralityOutliers,"RejectCentralityOutliers/O");
340 settingsTree->Fill();
341 fListOfHistos->Add(settingsTree);
344 //____________________________________________________________________
345 void AliAnalysisTaskPhiCorrelations::AnalyseCorrectionMode()
347 // Run the analysis on MC to get the correction maps
350 if ( fDebug > 3 ) AliInfo( " Processing event in Corrections mode ..." );
352 Double_t centrality = 0;
354 if (fCentralityMethod.Length() > 0)
356 AliCentrality *centralityObj = 0;
358 centralityObj = fAOD->GetHeader()->GetCentralityP();
360 centralityObj = fESD->GetCentrality();
364 centrality = centralityObj->GetCentralityPercentileUnchecked(fCentralityMethod);
365 AliInfo(Form("Centrality is %f", centrality));
369 Printf("WARNING: Centrality object is 0");
374 // Support for ESD and AOD based analysis
375 AliVEvent* inputEvent = fAOD;
383 fHistos->SetRunNumber(inputEvent->GetRunNumber());
384 bSign = (inputEvent->GetMagneticField() > 0) ? 1 : -1;
387 TObject* mc = fArrayMC;
392 fHistos->FillEvent(centrality, -1);
397 // Only consider MC events within the vtx-z region used also as cut on the reconstructed vertex
398 TObject* vertexSupplier = fMcEvent;
400 vertexSupplier = fAOD->FindListObject(AliAODMCHeader::StdBranchName());
402 if (!fAnalyseUE->VertexSelection(vertexSupplier, 0, fZVertex))
407 zVtx = ((AliAODMCHeader*) vertexSupplier)->GetVtxZ();
409 zVtx = fMcEvent->GetPrimaryVertex()->GetZ();
414 // For productions with injected signals, figure out above which label to skip particles/tracks
415 Int_t skipParticlesAbove = 0;
416 if (fInjectedSignals)
418 AliGenEventHeader* eventHeader = 0;
424 AliHeader* header = (AliHeader*) fMcEvent->Header();
426 AliFatal("fInjectedSignals set but no MC header found");
428 AliGenCocktailEventHeader* cocktailHeader = dynamic_cast<AliGenCocktailEventHeader*> (header->GenEventHeader());
432 AliFatal("fInjectedSignals set but no MC cocktail header found");
435 headers = cocktailHeader->GetHeaders()->GetEntries();
436 eventHeader = dynamic_cast<AliGenEventHeader*> (cocktailHeader->GetHeaders()->First());
441 AliAODMCHeader* header = (AliAODMCHeader*) fAOD->GetList()->FindObject(AliAODMCHeader::StdBranchName());
443 AliFatal("fInjectedSignals set but no MC header found");
445 headers = header->GetNCocktailHeaders();
446 eventHeader = header->GetCocktailHeader(0);
451 // We avoid AliFatal here, because the AOD productions sometimes have events where the MC header is missing
452 // (due to unreadable Kinematics) and we don't want to loose the whole job because of a few events
453 AliError("First event header not found. Skipping this event.");
454 fHistos->FillEvent(centrality, AliUEHist::kCFStepAnaTopology);
458 skipParticlesAbove = eventHeader->NProduced();
459 AliInfo(Form("Injected signals in this event (%d headers). Keeping events of %s. Will skip particles/tracks above %d.", headers, eventHeader->ClassName(), skipParticlesAbove));
463 TObjArray* tmpList = fAnalyseUE->GetAcceptedParticles(mc, 0, kTRUE, -1, kTRUE);
464 if (fInjectedSignals)
465 fAnalyseUE->RemoveInjectedSignals(tmpList, mc, skipParticlesAbove);
466 TObjArray* tracksMC = CloneAndReduceTrackList(tmpList);
472 for (Int_t i=0; i<fArrayMC->GetEntriesFast(); i++)
473 ((TH1F*) fListOfHistos->FindObject("pids"))->Fill(((AliAODMCParticle*) fArrayMC->At(i))->PdgCode());
477 for (Int_t i=0; i<fMcEvent->GetNumberOfTracks(); i++)
478 ((TH1F*) fListOfHistos->FindObject("pids"))->Fill(fMcEvent->GetTrack(i)->PdgCode());
485 // (MC-true all particles)
487 fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepAll, tracksMC, 0, weight);
492 AliEventPool* pool = fPoolMgr->GetEventPool(centrality, zVtx);
494 if (pool->IsReady() || pool->NTracksInPool() > fMixingTracks / 10 || pool->GetCurrentNEvents() >= 5)
495 for (Int_t jMix=0; jMix<pool->GetCurrentNEvents(); jMix++)
496 fHistosMixed->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepAll, tracksMC, pool->GetEvent(jMix), 1.0 / pool->GetCurrentNEvents(), (jMix == 0));
497 pool->UpdatePool(CloneAndReduceTrackList(tracksMC));
500 // Printf("trigger: %d", ((AliInputEventHandler*)fInputHandler)->IsEventSelected());
502 // Trigger selection ************************************************
503 if (!fFillOnlyStep0 && (fSkipTrigger || fAnalyseUE->TriggerSelection(fInputHandler)))
505 // (MC-true all particles)
507 if (!fReduceMemoryFootprint)
508 fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepTriggered, tracksMC, 0, weight);
510 fHistos->FillEvent(centrality, AliUEHist::kCFStepTriggered);
513 AliFatal("UNEXPECTED: inputEvent is 0. Trigger selection should have failed");
517 // Vertex selection *************************************************
518 if (fAnalyseUE->VertexSelection(inputEvent, fnTracksVertex, fZVertex))
520 // fill here for tracking efficiency
521 // loop over particle species
523 for (Int_t particleSpecies = 0; particleSpecies < 4; particleSpecies++)
525 TObjArray* primMCParticles = fAnalyseUE->GetAcceptedParticles(mc, 0x0, kTRUE, particleSpecies, kTRUE);
526 TObjArray* primRecoTracksMatched = fAnalyseUE->GetAcceptedParticles(inputEvent, mc, kTRUE, particleSpecies, kTRUE);
527 TObjArray* allRecoTracksMatched = fAnalyseUE->GetAcceptedParticles(inputEvent, mc, kFALSE, particleSpecies, kTRUE);
529 if (fInjectedSignals)
531 fAnalyseUE->RemoveInjectedSignals(primMCParticles, mc, skipParticlesAbove);
532 fAnalyseUE->RemoveInjectedSignals(primRecoTracksMatched, mc, skipParticlesAbove);
533 fAnalyseUE->RemoveInjectedSignals(allRecoTracksMatched, mc, skipParticlesAbove);
536 fHistos->FillTrackingEfficiency(primMCParticles, primRecoTracksMatched, allRecoTracksMatched, 0, particleSpecies, centrality);
538 // Printf("%d --> %d %d %d", particleSpecies, primMCParticles->GetEntries(), primRecoTracksMatched->GetEntries(), allRecoTracksMatched->GetEntries());
540 delete primMCParticles;
541 delete primRecoTracksMatched;
542 delete allRecoTracksMatched;
544 TObjArray* fakeParticles = fAnalyseUE->GetFakeParticles(inputEvent, mc, kFALSE, -1, kTRUE);
545 if (fInjectedSignals)
547 fAnalyseUE->RemoveInjectedSignals((TObjArray*) fakeParticles->At(0), mc, skipParticlesAbove);
548 fAnalyseUE->RemoveInjectedSignals((TObjArray*) fakeParticles->At(1), mc, skipParticlesAbove);
550 fHistos->FillTrackingEfficiency(0, 0, 0, (TObjArray*) fakeParticles->At(2), -1, centrality);
551 fHistos->FillFakePt(fakeParticles, centrality);
552 // Printf(">>>>> %d %d %d fakes", ((TObjArray*) fakeParticles->At(0))->GetEntriesFast(), ((TObjArray*) fakeParticles->At(1))->GetEntriesFast(), ((TObjArray*) fakeParticles->At(2))->GetEntriesFast());
553 delete fakeParticles;
555 // (MC-true all particles)
557 if (!fReduceMemoryFootprint)
558 fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepVertex, tracksMC, 0, weight);
560 fHistos->FillEvent(centrality, AliUEHist::kCFStepVertex);
562 // Get MC primaries that match reconstructed track
563 TObjArray* tracksRecoMatchedPrim = fAnalyseUE->GetAcceptedParticles(inputEvent, mc, kTRUE, -1, kTRUE);
564 if (fInjectedSignals)
565 fAnalyseUE->RemoveInjectedSignals(tracksRecoMatchedPrim, mc, skipParticlesAbove);
567 // (RECO-matched (quantities from MC particle) primary particles)
569 fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepTrackedOnlyPrim, tracksRecoMatchedPrim, 0, weight);
571 // Get MC primaries + secondaries that match reconstructed track
572 TObjArray* tracksRecoMatchedAll = fAnalyseUE->GetAcceptedParticles(inputEvent, mc, kFALSE, -1, kTRUE);
573 if (fInjectedSignals)
574 fAnalyseUE->RemoveInjectedSignals(tracksRecoMatchedAll, mc, skipParticlesAbove);
576 // (RECO-matched (quantities from MC particle) all particles)
578 fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepTracked, tracksRecoMatchedAll, 0, weight);
581 TObjArray* tracks = fAnalyseUE->GetAcceptedParticles(inputEvent, 0, kTRUE, -1, kTRUE);
582 if (fInjectedSignals)
583 fAnalyseUE->RemoveInjectedSignals(tracks, mc, skipParticlesAbove);
588 fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepReconstructed, tracks, 0, weight);
590 // two track cut, STEP 8
591 if (fTwoTrackEfficiencyCut > 0)
592 fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepBiasStudy, tracks, 0, weight, kTRUE, kTRUE, bSign, fTwoTrackEfficiencyCut);
595 if (fFillMixed && !fSkipStep6)
597 AliEventPool* pool2 = fPoolMgr->GetEventPool(centrality, zVtx + 100);
598 //pool2->PrintInfo();
599 if (pool2->IsReady() || pool2->NTracksInPool() > fMixingTracks / 10 || pool2->GetCurrentNEvents() >= 5)
600 for (Int_t jMix=0; jMix<pool2->GetCurrentNEvents(); jMix++)
603 fHistosMixed->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepReconstructed, tracks, pool2->GetEvent(jMix), 1.0 / pool2->GetCurrentNEvents(), (jMix == 0));
605 // two track cut, STEP 8
606 if (fTwoTrackEfficiencyCut > 0)
607 fHistosMixed->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepBiasStudy, tracks, pool2->GetEvent(jMix), 1.0 / pool2->GetCurrentNEvents(), (jMix == 0), kTRUE, bSign, fTwoTrackEfficiencyCut);
609 pool2->UpdatePool(CloneAndReduceTrackList(tracks));
612 if (0 && !fReduceMemoryFootprint)
614 // make list of secondaries (matched with MC)
615 TObjArray* tracksRecoMatchedSecondaries = new TObjArray;
616 for (Int_t i=0; i<tracksRecoMatchedAll->GetEntriesFast(); i++)
617 if (((AliAODMCParticle*)tracksRecoMatchedAll->At(i))->IsPhysicalPrimary() == kFALSE)
618 tracksRecoMatchedSecondaries->Add(tracksRecoMatchedAll->At(i));
620 // Study: Use only secondaries as trigger particles and plot the correlation vs. all particles; store in step 9
621 fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepBiasStudy2, tracksRecoMatchedSecondaries, tracksRecoMatchedAll, weight);
623 // Study: Use only primaries as trigger particles and plot the correlation vs. secondaries; store in step 8
624 fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepBiasStudy, tracksRecoMatchedPrim, tracksRecoMatchedSecondaries, weight);
626 // plot delta phi vs process id of secondaries
627 // trigger particles: primaries in 4 < pT < 10
628 // associated particles: secondaries in 1 < pT < 10
630 for (Int_t i=0; i<tracksRecoMatchedPrim->GetEntriesFast(); i++)
632 AliVParticle* triggerParticle = (AliVParticle*) tracksRecoMatchedPrim->At(i);
634 if (triggerParticle->Pt() < 4 || triggerParticle->Pt() > 10)
637 for (Int_t j=0; j<tracksRecoMatchedSecondaries->GetEntriesFast(); j++)
639 AliAODMCParticle* particle = (AliAODMCParticle*) tracksRecoMatchedSecondaries->At(j);
641 if (particle->Pt() < 1 || particle->Pt() > 10)
644 if (particle->Pt() > triggerParticle->Pt())
647 Double_t deltaPhi = triggerParticle->Phi() - particle->Phi();
648 if (deltaPhi > 1.5 * TMath::Pi())
649 deltaPhi -= TMath::TwoPi();
650 if (deltaPhi < -0.5 * TMath::Pi())
651 deltaPhi += TMath::TwoPi();
653 Int_t processID = fMcEvent->Stack()->Particle(particle->GetLabel())->GetUniqueID();
655 ((TH2F*) fListOfHistos->FindObject("processIDs"))->Fill(deltaPhi, processID);
659 delete tracksRecoMatchedSecondaries;
662 delete tracksRecoMatchedPrim;
663 delete tracksRecoMatchedAll;
671 //____________________________________________________________________
672 void AliAnalysisTaskPhiCorrelations::AnalyseDataMode()
675 // Run the analysis on DATA or MC to get raw distributions
677 if ( fDebug > 3 ) AliInfo( " Processing event in Data mode ..." );
679 ((TH1F*) fListOfHistos->FindObject("eventStat"))->Fill(0);
684 // skip not selected events here (the AOD is not updated for those)
685 if (!fSkipTrigger && !(fInputHandler->IsEventSelected() & fSelectBit))
688 // Support for ESD and AOD based analysis
689 AliVEvent* inputEvent = fAOD;
693 Double_t centrality = 0;
695 AliCentrality *centralityObj = 0;
696 if (fCentralityMethod.Length() > 0)
698 if (fCentralityMethod == "ZNA_MANUAL")
701 for(Int_t j = 0; j < 4; ++j) {
702 if (fESD->GetZDCData()->GetZDCTDCData(12,j) != 0) {
707 // Printf("%d %f", zna, fZNAtower[0]);
710 // code from Chiara O (23.10.12)
711 const Double_t *fZNAtower = fESD->GetZDCData()->GetZN2TowerEnergy();
712 Float_t znacut[4] = {681., 563., 413., 191.};
714 if(fZNAtower[0]>znacut[0]) centrality = 1;
715 else if(fZNAtower[0]>znacut[1]) centrality = 21;
716 else if(fZNAtower[0]>znacut[2]) centrality = 41;
717 else if(fZNAtower[0]>znacut[3]) centrality = 61;
718 else centrality = 81;
723 else if (fCentralityMethod == "TRACKS_MANUAL")
726 TObjArray* tracks = fAnalyseUE->GetAcceptedParticles(inputEvent, 0, kTRUE, -1, kTRUE);
727 centrality = tracks->GetEntriesFast();
730 // Printf("%d %f", tracks->GetEntriesFast(), centrality);
736 centralityObj = fAOD->GetHeader()->GetCentralityP();
738 centralityObj = fESD->GetCentrality();
741 centrality = centralityObj->GetCentralityPercentile(fCentralityMethod);
742 //centrality = centralityObj->GetCentralityPercentileUnchecked(fCentralityMethod);
751 if (fAOD->GetVZEROData())
754 for (Int_t i=0; i<64; i++)
755 multV0 += fAOD->GetVZEROData()->GetMultiplicity(i);
759 AliInfo("Rejecting event due to too small V0 multiplicity");
766 AliInfo(Form("Centrality is %f", centrality));
769 Float_t bSign = (inputEvent->GetMagneticField() > 0) ? 1 : -1;
771 fHistos->SetRunNumber(inputEvent->GetRunNumber());
773 // Fill the "event-counting-container", it is needed to get the number of events remaining after each event-selection cut
774 fHistos->FillEvent(centrality, AliUEHist::kCFStepAll);
776 // Trigger selection ************************************************
777 if (!fSkipTrigger && !fAnalyseUE->TriggerSelection(fInputHandler)) return;
779 // Fill the "event-counting-container", it is needed to get the number of events remaining after each event-selection cut
780 fHistos->FillEvent(centrality, AliUEHist::kCFStepTriggered);
782 // Vertex selection *************************************************
783 if(!fAnalyseUE->VertexSelection(inputEvent, fnTracksVertex, fZVertex)) return;
785 // Fill the "event-counting-container", it is needed to get the number of events remaining after each event-selection cut
786 fHistos->FillEvent(centrality, AliUEHist::kCFStepVertex);
789 if (centrality < 0 && !fCompareCentralities)
792 TObjArray* tracks = fAnalyseUE->GetAcceptedParticles(inputEvent, 0, kTRUE, -1, kTRUE);
794 // check for outlier in centrality vs number of tracks (rough constants extracted from correlation histgram)
795 Bool_t reject = kFALSE;
796 if (fRejectCentralityOutliers)
798 if (centrality > 40 && centrality <= 50 && tracks->GetEntriesFast() > 1160)
800 if (centrality > 50 && centrality <= 60 && tracks->GetEntriesFast() > 650)
802 if (centrality > 60 && centrality <= 70 && tracks->GetEntriesFast() > 370)
804 if (centrality > 70 && centrality <= 80 && tracks->GetEntriesFast() > 220)
806 if (centrality > 80 && centrality <= 90 && tracks->GetEntriesFast() > 130)
808 if (centrality > 90 && tracks->GetEntriesFast() > 75)
814 AliInfo(Form("Rejecting event due to centrality vs tracks correlation: %f %d", centrality, tracks->GetEntriesFast()));
815 fHistos->FillEvent(centrality, AliUEHist::kCFStepAnaTopology);
821 // create a list of reduced objects. This speeds up processing and reduces memory consumption for the event pool
822 TObjArray* tracksClone = CloneAndReduceTrackList(tracks);
825 //Printf("Accepted %d tracks", tracks->GetEntries());
827 const AliVVertex* vertex = inputEvent->GetPrimaryVertex();
828 Double_t zVtx = vertex->GetZ();
834 // fill two different centralities (syst study)
835 // the zvtx axis is used to distinguish the results of both centralities: configured centrality in zvtx = 0, SPD in zvtx = 2
836 if (fCompareCentralities)
839 // Fill containers at STEP 6 (reconstructed)
843 fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepReconstructed, tracksClone, 0, weight);
845 ((TH1F*) fListOfHistos->FindObject("eventStat"))->Fill(1);
847 if (fTwoTrackEfficiencyCut > 0)
848 fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepBiasStudy, tracksClone, 0, weight, kTRUE, kTRUE, bSign, fTwoTrackEfficiencyCut);
851 // fill second time with SPD centrality
852 if (fCompareCentralities && centralityObj)
854 centrality = centralityObj->GetCentralityPercentile("CL1");
855 if (centrality >= 0 && !fSkipStep6)
856 fHistos->FillCorrelations(centrality, 2, AliUEHist::kCFStepReconstructed, tracksClone, 0, weight);
863 // 1. First get an event pool corresponding in mult (cent) and
864 // zvertex to the current event. Once initialized, the pool
865 // should contain nMix (reduced) events. This routine does not
866 // pre-scan the chain. The first several events of every chain
867 // will be skipped until the needed pools are filled to the
868 // specified depth. If the pool categories are not too rare, this
869 // should not be a problem. If they are rare, you could lose
872 // 2. Collect the whole pool's content of tracks into one TObjArray
873 // (bgTracks), which is effectively a single background super-event.
875 // 3. The reduced and bgTracks arrays must both be passed into
876 // FillCorrelations(). Also nMix should be passed in, so a weight
877 // of 1./nMix can be applied.
879 AliEventPool* pool = fPoolMgr->GetEventPool(centrality, zVtx);
882 AliFatal(Form("No pool found for centrality = %f, zVtx = %f", centrality, zVtx));
886 if (pool->IsReady() || pool->NTracksInPool() > fMixingTracks / 10 || pool->GetCurrentNEvents() >= 5)
889 Int_t nMix = pool->GetCurrentNEvents();
890 // cout << "nMix = " << nMix << " tracks in pool = " << pool->NTracksInPool() << endl;
892 ((TH1F*) fListOfHistos->FindObject("eventStat"))->Fill(2);
893 ((TH2F*) fListOfHistos->FindObject("mixedDist"))->Fill(centrality, pool->NTracksInPool());
895 ((TH1F*) fListOfHistos->FindObject("eventStat"))->Fill(3);
897 // Fill mixed-event histos here
898 for (Int_t jMix=0; jMix<nMix; jMix++)
900 TObjArray* bgTracks = pool->GetEvent(jMix);
903 fHistosMixed->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepReconstructed, tracksClone, bgTracks, 1.0 / nMix, (jMix == 0));
905 if (fTwoTrackEfficiencyCut > 0)
906 fHistosMixed->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepBiasStudy, tracksClone, bgTracks, 1.0 / nMix, (jMix == 0), kTRUE, bSign, fTwoTrackEfficiencyCut);
910 // ownership is with the pool now
911 pool->UpdatePool(tracksClone);
918 TObjArray* AliAnalysisTaskPhiCorrelations::CloneAndReduceTrackList(TObjArray* tracks)
920 // clones a track list by using AliDPhiBasicParticle which uses much less memory (used for event mixing)
922 TObjArray* tracksClone = new TObjArray;
923 tracksClone->SetOwner(kTRUE);
925 for (Int_t i=0; i<tracks->GetEntriesFast(); i++)
927 AliVParticle* particle = (AliVParticle*) tracks->At(i);
928 tracksClone->Add(new AliDPhiBasicParticle(particle->Eta(), particle->Phi(), particle->Pt(), particle->Charge()));
934 //____________________________________________________________________
935 void AliAnalysisTaskPhiCorrelations::Initialize()
938 fInputHandler = (AliInputEventHandler*)
939 ((AliAnalysisManager::GetAnalysisManager())->GetInputEventHandler());
941 fMcHandler = dynamic_cast<AliMCEventHandler*> (AliAnalysisManager::GetAnalysisManager()->GetMCtruthEventHandler());