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 **************************************************************************/
26 #include <TMCProcess.h>
28 #include "AliAnalysisTaskPhiCorrelations.h"
29 #include "AliAnalyseLeadingTrackUE.h"
30 #include "AliUEHistograms.h"
31 #include "AliUEHist.h"
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"
41 #include "AliMCEventHandler.h"
42 #include "AliVParticle.h"
43 #include "AliCFContainer.h"
45 #include "AliESDEvent.h"
46 #include "AliESDInputHandler.h"
47 #include "AliMultiplicity.h"
48 #include "AliCentrality.h"
51 #include "AliEventPoolManager.h"
54 ////////////////////////////////////////////////////////////////////////
56 // Analysis class for azimuthal correlation studies
57 // Based on the UE task from Sara Vallero and Jan Fiete
59 // This class needs input AODs.
60 // The output is a list of analysis-specific containers.
62 // The AOD can be either connected to the InputEventHandler
63 // for a chain of AOD files
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
70 // Jan Fiete Grosse-Oetringhaus
72 ////////////////////////////////////////////////////////////////////////
75 ClassImp( AliAnalysisTaskPhiCorrelations )
77 //____________________________________________________________________
78 AliAnalysisTaskPhiCorrelations:: AliAnalysisTaskPhiCorrelations(const char* name):
79 AliAnalysisTask(name,""),
80 // general configuration
83 fReduceMemoryFootprint(kFALSE),
84 // pointers to UE classes
88 fkTrackingEfficiency(0x0),
89 // handlers and events
100 fnTracksVertex(1), // QA tracks pointing to principal vertex (= 3 default)
102 fCentralityMethod("V0M"),
108 fUseChargeHadrons(kFALSE),
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());
119 AliAnalysisTaskPhiCorrelations::~AliAnalysisTaskPhiCorrelations()
123 if (fListOfHistos && !AliAnalysisManager::GetAnalysisManager()->IsProofMode())
124 delete fListOfHistos;
127 //____________________________________________________________________
128 void AliAnalysisTaskPhiCorrelations::ConnectInputData(Option_t* /*option*/)
131 // Connect the input data
132 if (fDebug > 1) AliInfo("ConnectInputData() ");
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.
138 // Delta AODs are also accepted.
140 TObject* handler = AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler();
142 if( handler && handler->InheritsFrom("AliAODInputHandler") )
144 fAOD = ((AliAODInputHandler*)handler)->GetEvent();
145 if (fDebug > 1) AliInfo(" ==== Tracks and Jets from AliAODInputHandler");
149 handler = AliAnalysisManager::GetAnalysisManager()->GetOutputEventHandler();
150 if (handler && handler->InheritsFrom("AliAODHandler") )
152 fAOD = ((AliAODHandler*)handler)->GetAOD();
153 if (fDebug > 1) AliInfo(" ==== Tracks and Jets from AliAODHandler");
157 AliWarning("I can't get any AOD Event Handler");
161 if (handler && handler->InheritsFrom("AliESDInputHandler") )
163 // pointer received per event in ::Exec
164 if (fDebug > 1) AliInfo(" ==== Tracks and Jets from AliESDInputHandler");
167 // Initialize common pointers
171 //____________________________________________________________________
172 void AliAnalysisTaskPhiCorrelations::CreateOutputObjects()
174 // Create the output container
176 if (fDebug > 1) AliInfo("CreateOutputObjects()");
178 // Initialize class with main algorithms, event and track selection.
179 fAnalyseUE = new AliAnalyseLeadingTrackUE();
180 fAnalyseUE->SetParticleSelectionCriteria(fFilterBit, fUseChargeHadrons, fTrackEtaCut, fPtMin);
181 fAnalyseUE->SetDebug(fDebug);
182 fAnalyseUE->DefineESDCuts(fFilterBit);
184 // Initialize output list of containers
185 if (fListOfHistos != NULL){
186 delete fListOfHistos;
187 fListOfHistos = NULL;
190 fListOfHistos = new TList();
191 fListOfHistos->SetOwner(kTRUE);
194 // Initialize class to handle histograms
195 fHistos = new AliUEHistograms("AliUEHistogramsSame", "4");
196 fHistosMixed = new AliUEHistograms("AliUEHistogramsMixed", "4");
198 fHistos->SetSelectCharge(fSelectCharge);
199 fHistosMixed->SetSelectCharge(fSelectCharge);
201 // add histograms to list
202 fListOfHistos->Add(fHistos);
203 fListOfHistos->Add(fHistosMixed);
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));
208 // Add task configuration to output list
212 // Int_t trackDepth = 100; // Require e.g. 20 5-track events, or 2 50-track events
213 Int_t trackDepth = 5000; // Require e.g. 20 5-track events, or 2 50-track events
214 Int_t poolsize = 100; // Maximum number of events
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();
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();
222 fPoolMgr = new AliEventPoolManager(poolsize, trackDepth, nCentralityBins, centralityBins, nZvtxBins, zvtxbin);
227 //____________________________________________________________________
228 void AliAnalysisTaskPhiCorrelations::Exec(Option_t */*option*/)
230 // array of MC particles
234 fArrayMC = dynamic_cast<TClonesArray*>(fAOD->FindListObject(AliAODMCParticle::StdBranchName()));
236 AliFatal("No array of MC particles found !!!");
238 fMcEvent = fMcHandler->MCEvent();
241 // receive ESD pointer if we are not running AOD analysis
244 AliVEventHandler* handler = AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler();
245 if (handler && handler->InheritsFrom("AliESDInputHandler"))
246 fESD = ((AliESDInputHandler*)handler)->GetEvent();
250 if (fMode) AnalyseCorrectionMode();
251 else AnalyseDataMode();
253 PostData(0,fListOfHistos);
256 /******************** ANALYSIS METHODS *****************************/
258 //____________________________________________________________________
259 void AliAnalysisTaskPhiCorrelations::AddSettingsTree()
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);
273 //____________________________________________________________________
274 void AliAnalysisTaskPhiCorrelations::AnalyseCorrectionMode()
276 // Run the analysis on MC to get the correction maps
279 if ( fDebug > 3 ) AliInfo( " Processing event in Corrections mode ..." );
281 Double_t centrality = 0;
283 if (fCentralityMethod.Length() > 0)
285 AliCentrality *centralityObj = 0;
287 centralityObj = fAOD->GetHeader()->GetCentralityP();
289 centralityObj = fESD->GetCentrality();
293 centrality = centralityObj->GetCentralityPercentileUnchecked(fCentralityMethod);
294 Printf("Centrality is %f", centrality);
298 Printf("WARNING: Centrality object is 0");
303 // Support for ESD and AOD based analysis
304 AliVEvent* inputEvent = fAOD;
308 TObject* mc = fArrayMC;
313 fHistos->FillEvent(centrality, -1);
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))
319 Float_t zVtx = fMcEvent->GetPrimaryVertex()->GetZ();
322 TObjArray* tracksMC = fAnalyseUE->GetAcceptedParticles(mc, 0, kTRUE, -1, kTRUE);
324 // (MC-true all particles)
326 fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepAll, tracksMC);
328 // Trigger selection ************************************************
329 if (fAnalyseUE->TriggerSelection(fInputHandler))
331 fHistos->FillEvent(centrality, AliUEHist::kCFStepTriggered);
333 // Vertex selection *************************************************
334 if (fAnalyseUE->VertexSelection(inputEvent, fnTracksVertex, fZVertex))
336 // fill here for tracking efficiency
337 // loop over particle species
339 for (Int_t particleSpecies = 0; particleSpecies < 4; particleSpecies++)
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);
345 fHistos->FillTrackingEfficiency(primMCParticles, primRecoTracksMatched, allRecoTracksMatched, particleSpecies, centrality);
347 delete primMCParticles;
348 delete primRecoTracksMatched;
349 delete allRecoTracksMatched;
352 // (MC-true all particles)
354 if (!fReduceMemoryFootprint)
355 fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepVertex, tracksMC);
357 // Get MC primaries that match reconstructed track
358 TObjArray* tracksRecoMatchedPrim = fAnalyseUE->GetAcceptedParticles(inputEvent, mc, kTRUE, -1, kTRUE);
360 // (RECO-matched (quantities from MC particle) primary particles)
362 fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepTrackedOnlyPrim, tracksRecoMatchedPrim);
364 // Get MC primaries + secondaries that match reconstructed track
365 TObjArray* tracksRecoMatchedAll = fAnalyseUE->GetAcceptedParticles(inputEvent, mc, kFALSE, -1, kTRUE);
367 // (RECO-matched (quantities from MC particle) all particles)
369 fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepTracked, tracksRecoMatchedAll);
372 TObjArray* tracks = fAnalyseUE->GetAcceptedParticles(inputEvent, 0, kTRUE, -1, kTRUE);
376 fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepReconstructed, tracks);
378 if (0 && !fReduceMemoryFootprint)
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));
386 // Study: Use only secondaries as trigger particles and plot the correlation vs. all particles; store in step 9
387 fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepBiasStudy2, tracksRecoMatchedSecondaries, tracksRecoMatchedAll);
389 // Study: Use only primaries as trigger particles and plot the correlation vs. secondaries; store in step 8
390 fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepBiasStudy, tracksRecoMatchedPrim, tracksRecoMatchedSecondaries);
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
396 for (Int_t i=0; i<tracksRecoMatchedPrim->GetEntries(); i++)
398 AliVParticle* triggerParticle = (AliVParticle*) tracksRecoMatchedPrim->At(i);
400 if (triggerParticle->Pt() < 4 || triggerParticle->Pt() > 10)
403 for (Int_t j=0; j<tracksRecoMatchedSecondaries->GetEntries(); j++)
405 AliAODMCParticle* particle = (AliAODMCParticle*) tracksRecoMatchedSecondaries->At(j);
407 if (particle->Pt() < 1 || particle->Pt() > 10)
410 if (particle->Pt() > triggerParticle->Pt())
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();
419 Int_t processID = fMcEvent->Stack()->Particle(particle->GetLabel())->GetUniqueID();
421 ((TH2F*) fListOfHistos->FindObject("processIDs"))->Fill(deltaPhi, processID);
425 delete tracksRecoMatchedSecondaries;
428 delete tracksRecoMatchedPrim;
429 delete tracksRecoMatchedAll;
437 //____________________________________________________________________
438 void AliAnalysisTaskPhiCorrelations::AnalyseDataMode()
441 // Run the analysis on DATA or MC to get raw distributions
443 if ( fDebug > 3 ) AliInfo( " Processing event in Data mode ..." );
445 // skip not selected events here (the AOD is not updated for those)
449 if (!(fInputHandler->IsEventSelected() & (AliVEvent::kMB | AliVEvent::kUserDefined)))
452 Double_t centrality = 0;
454 if (fCentralityMethod.Length() > 0)
456 AliCentrality *centralityObj = 0;
458 centralityObj = fAOD->GetHeader()->GetCentralityP();
460 centralityObj = fESD->GetCentrality();
463 centrality = centralityObj->GetCentralityPercentile(fCentralityMethod);
464 //centrality = centralityObj->GetCentralityPercentileUnchecked(fCentralityMethod);
467 Printf("Centrality is %f", centrality);
470 // Support for ESD and AOD based analysis
471 AliVEvent* inputEvent = fAOD;
475 fHistos->SetRunNumber(inputEvent->GetRunNumber());
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);
480 // Trigger selection ************************************************
481 if (!fAnalyseUE->TriggerSelection(fInputHandler)) return;
483 // Fill the "event-counting-container", it is needed to get the number of events remaining after each event-selection cut
484 fHistos->FillEvent(centrality, AliUEHist::kCFStepTriggered);
486 // Vertex selection *************************************************
487 if(!fAnalyseUE->VertexSelection(inputEvent, fnTracksVertex, fZVertex)) return;
489 // Fill the "event-counting-container", it is needed to get the number of events remaining after each event-selection cut
490 fHistos->FillEvent(centrality, AliUEHist::kCFStepVertex);
495 TObjArray* tracks = fAnalyseUE->GetAcceptedParticles(inputEvent, 0, kTRUE, -1, kTRUE);
496 //Printf("Accepted %d tracks", tracks->GetEntries());
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
509 // 2. Collect the whole pool's content of tracks into one TObjArray
510 // (bgTracks), which is effectively a single background super-event.
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.
516 const AliVVertex* vertex = inputEvent->GetPrimaryVertex();
517 Double_t zVtx = vertex->GetZ();
519 AliEventPool* pool = fPoolMgr->GetEventPool(centrality, zVtx);
522 AliFatal(Form("No pool found for centrality = %f, zVtx = %f", centrality, zVtx));
526 // Fill containers at STEP 6 (reconstructed)
527 fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepReconstructed, tracks);
532 Int_t nMix = pool->GetCurrentNEvents();
533 //cout << "nMix = " << nMix << endl;
535 // Fill mixed-event histos here
536 for (Int_t jMix=0; jMix<nMix; jMix++) {
537 TObjArray* bgTracks = pool->GetEvent(jMix);
538 fHistosMixed->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepReconstructed, tracks, bgTracks, 1.0 / nMix, (jMix == 0));
542 // clone and give ownership to event pool
543 TObjArray* tracksClone = (TObjArray*) tracks->Clone();
544 tracksClone->SetOwner(kTRUE);
546 pool->UpdatePool(tracksClone);
552 //____________________________________________________________________
553 void AliAnalysisTaskPhiCorrelations::Initialize()
556 fInputHandler = (AliInputEventHandler*)
557 ((AliAnalysisManager::GetAnalysisManager())->GetInputEventHandler());
559 fMcHandler = dynamic_cast<AliMCEventHandler*> (AliAnalysisManager::GetAnalysisManager()->GetMCtruthEventHandler());