PWGCF/Correlations/DPhi/AliAnalysisTaskPhiCorrelations.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
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  10  * copies and that both the copyright notice and this permission notice   *
  11  * appear in the supporting documentation. The authors make no claims     *
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  13  * provided "as is" without express or implied warranty.                  *
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  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>
  26
  27 #include "AliAnalysisTaskPhiCorrelations.h"
  28 #include "AliAnalyseLeadingTrackUE.h"
  29 #include "AliUEHistograms.h"
  30 #include "AliUEHist.h"
  31
  32 #include "AliAnalysisManager.h"
  33 #include "AliAODHandler.h"
  34 #include "AliAODInputHandler.h"
  35 #include "AliAODMCParticle.h"
  36 #include "AliInputEventHandler.h"
  37 #include "AliLog.h"
  38 #include "AliMCEventHandler.h"
  39 #include "AliVParticle.h"
  40 #include "AliCFContainer.h"
  41
  42 #include "AliESDEvent.h"
  43 #include "AliESDInputHandler.h"
  44 #include "AliMultiplicity.h"
  45 #include "AliCentrality.h"
  46 #include "AliStack.h"
  47 #include "AliAODMCHeader.h"
  48 #include "AliGenCocktailEventHeader.h"
  49 #include "AliGenEventHeader.h"
  50
  51 #include "AliEventPoolManager.h"
  52
  53 #include "AliESDZDC.h"
  54 #include "AliESDtrackCuts.h"
  55
  56
  57 ////////////////////////////////////////////////////////////////////////
  58 //
  59 // Analysis class for azimuthal correlation studies
  60 // Based on the UE task from Sara Vallero and Jan Fiete
  61 //
  62 // This class needs input AODs.
  63 // The output is a list of analysis-specific containers.
  64 //
  65 // The AOD can be either connected to the InputEventHandler
  66 // for a chain of AOD files
  67 // or
  68 // to the OutputEventHandler
  69 // for a chain of ESD files,
  70 // in this case the class should be in the train after the jet-finder
  71 //
  72 //    Authors:
  73 //    Jan Fiete Grosse-Oetringhaus
  74 //
  75 ////////////////////////////////////////////////////////////////////////
  76
  77
  78 ClassImp( AliAnalysisTaskPhiCorrelations )
  79 ClassImp( AliDPhiBasicParticle )
  80
  81 //____________________________________________________________________
  82 AliAnalysisTaskPhiCorrelations:: AliAnalysisTaskPhiCorrelations(const char* name):
  83 AliAnalysisTask(name,""),
  84 // general configuration
  85 fDebug(0),
  86 fMode(0),
  87 fReduceMemoryFootprint(kFALSE),
  88 fFillMixed(kTRUE),
  89 fMixingTracks(50000),
  90 fCompareCentralities(kFALSE),
  91 fTwoTrackEfficiencyStudy(kFALSE),
  92 fTwoTrackEfficiencyCut(0),
  93 fUseVtxAxis(kFALSE),
  94 fCourseCentralityBinning(kFALSE),
  95 fSkipTrigger(kFALSE),
  96 fInjectedSignals(kFALSE),
  97 // pointers to UE classes
  98 fAnalyseUE(0x0),
  99 fHistos(0x0),
 100 fHistosMixed(0),
 101 fkTrackingEfficiency(0x0),
 102 // handlers and events
 103 fAOD(0x0),
 104 fESD(0x0),
 105 fArrayMC(0x0),
 106 fInputHandler(0x0),
 107 fMcEvent(0x0),
 108 fMcHandler(0x0),
 109 fPoolMgr(0x0),
 110 // histogram settings
 111 fListOfHistos(0x0),
 112 // event QA
 113 fnTracksVertex(1),  // QA tracks pointing to principal vertex (= 3 default)
 114 fZVertex(7.),
 115 fCentralityMethod("V0M"),
 116 // track cuts
 117 fTrackEtaCut(0.8),
 118 fOnlyOneEtaSide(0),
 119 fPtMin(0.5),
 120 fFilterBit(0xFF),
 121 fSelectBit(AliVEvent::kMB|AliVEvent::kUserDefined),
 122 fUseChargeHadrons(kFALSE),
 123 fSelectCharge(0),
 124 fTriggerSelectCharge(0),
 125 fTriggerRestrictEta(-1),
 126 fEtaOrdering(kFALSE),
 127 fCutConversions(kFALSE),
 128 fCutResonances(kFALSE),
 129 fFillOnlyStep0(kFALSE),
 130 fSkipStep6(kFALSE),
 131 fRejectCentralityOutliers(kFALSE),
 132 fFillpT(kFALSE)
 133 {
 134   // Default constructor
 135   // Define input and output slots here
 136   // Input slot #0 works with a TChain
 137   DefineInput(0, TChain::Class());
 138   // Output slot #0 writes into a TList container
 139   DefineOutput(0, TList::Class());
 140 }
 141
 142 AliAnalysisTaskPhiCorrelations::~AliAnalysisTaskPhiCorrelations()
 143 {
 144   // destructor
 145
 146   if (fListOfHistos  && !AliAnalysisManager::GetAnalysisManager()->IsProofMode())
 147     delete fListOfHistos;
 148 }
 149
 150 //____________________________________________________________________
 151 void AliAnalysisTaskPhiCorrelations::ConnectInputData(Option_t* /*option*/)
 152 {
 153
 154   // Connect the input data
 155   if (fDebug > 1) AliInfo("ConnectInputData() ");
 156
 157   // Since AODs can either be connected to the InputEventHandler
 158   // or to the OutputEventHandler ( the AOD is created by a previus task in the train )
 159   // we need to get the pointer to the AODEvent correctly.
 160
 161   // Delta AODs are also accepted.
 162
 163   TObject* handler = AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler();
 164
 165   if( handler && handler->InheritsFrom("AliAODInputHandler") )
 166   { // input AOD
 167     fAOD = ((AliAODInputHandler*)handler)->GetEvent();
 168     if (fDebug > 1) AliInfo(" ==== Tracks and Jets from AliAODInputHandler");
 169   }
 170   else
 171   {  //output AOD
 172     handler = AliAnalysisManager::GetAnalysisManager()->GetOutputEventHandler();
 173     if (handler && handler->InheritsFrom("AliAODHandler") )
 174     {
 175       fAOD = ((AliAODHandler*)handler)->GetAOD();
 176       if (fDebug > 1) AliInfo(" ==== Tracks and Jets from AliAODHandler");
 177     }
 178     else
 179     {  // no AOD
 180       AliWarning("I can't get any AOD Event Handler");
 181     }
 182   }
 183
 184   if (handler && handler->InheritsFrom("AliESDInputHandler") )
 185   { // input ESD
 186     // pointer received per event in ::Exec
 187     if (fDebug > 1) AliInfo(" ==== Tracks and Jets from AliESDInputHandler");
 188   }
 189
 190   // Initialize common pointers
 191   Initialize();
 192 }
 193
 194 //____________________________________________________________________
 195 void  AliAnalysisTaskPhiCorrelations::CreateOutputObjects()
 196 {
 197   // Create the output container
 198
 199   if (fDebug > 1) AliInfo("CreateOutputObjects()");
 200
 201   // Initialize class with main algorithms, event and track selection.
 202   fAnalyseUE = new AliAnalyseLeadingTrackUE();
 203   fAnalyseUE->SetParticleSelectionCriteria(fFilterBit, fUseChargeHadrons, fTrackEtaCut, fPtMin);
 204   fAnalyseUE->SetDebug(fDebug);
 205   fAnalyseUE->DefineESDCuts(fFilterBit);
 206   fAnalyseUE->SetEventSelection(fSelectBit);
 207
 208   // Initialize output list of containers
 209   if (fListOfHistos != NULL){
 210         delete fListOfHistos;
 211         fListOfHistos = NULL;
 212         }
 213   if (!fListOfHistos){
 214         fListOfHistos = new TList();
 215         fListOfHistos->SetOwner(kTRUE);
 216         }
 217
 218   // Initialize class to handle histograms
 219   TString histType = "4R";
 220   if (fUseVtxAxis == 1)
 221     histType = "5R";
 222   else if (fUseVtxAxis == 2)
 223     histType = "6R";
 224   if (fCourseCentralityBinning)
 225     histType += "C";
 226   fHistos = new AliUEHistograms("AliUEHistogramsSame", histType);
 227   fHistosMixed = new AliUEHistograms("AliUEHistogramsMixed", histType);
 228
 229   fHistos->SetSelectCharge(fSelectCharge);
 230   fHistosMixed->SetSelectCharge(fSelectCharge);
 231
 232   fHistos->SetSelectTriggerCharge(fTriggerSelectCharge);
 233   fHistosMixed->SetSelectTriggerCharge(fTriggerSelectCharge);
 234
 235   fHistos->SetTriggerRestrictEta(fTriggerRestrictEta);
 236   fHistosMixed->SetTriggerRestrictEta(fTriggerRestrictEta);
 237
 238   fHistos->SetOnlyOneEtaSide(fOnlyOneEtaSide);
 239   fHistosMixed->SetOnlyOneEtaSide(fOnlyOneEtaSide);
 240
 241   fHistos->SetEtaOrdering(fEtaOrdering);
 242   fHistosMixed->SetEtaOrdering(fEtaOrdering);
 243
 244   fHistos->SetPairCuts(fCutConversions, fCutResonances);
 245   fHistosMixed->SetPairCuts(fCutConversions, fCutResonances);
 246
 247   // add histograms to list
 248   fListOfHistos->Add(fHistos);
 249   fListOfHistos->Add(fHistosMixed);
 250
 251   fListOfHistos->Add(new TH2F("trackletsVsV0Cent", ";L1 clusters;v0 centrality", 100, -0.5, 9999.5, 101, 0, 101));
 252   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));
 253   fListOfHistos->Add(new TH1F("eventStat", ";;events", 4, -0.5, 3.5));
 254   fListOfHistos->Add(new TH2F("mixedDist", ";centrality;tracks;events", 101, 0, 101, 200, 0, fMixingTracks * 1.5));
 255   fListOfHistos->Add(new TH1F("pids", ";pdg;tracks", 2001, -1000.5, 1000.5));
 256   fListOfHistos->Add(new TH2F("referenceMultiplicity", ";centrality;tracks;events", 101, 0, 101, 200, 0, 400));
 257
 258   PostData(0,fListOfHistos);
 259
 260   // Add task configuration to output list
 261   AddSettingsTree();
 262
 263   // event mixing
 264   Int_t trackDepth = fMixingTracks;
 265   Int_t poolsize   = 1000;  // Maximum number of events, ignored in the present implemented of AliEventPoolManager
 266
 267   Int_t nCentralityBins  = fHistos->GetUEHist(2)->GetEventHist()->GetNBins(1);
 268   Double_t* centralityBins = (Double_t*) fHistos->GetUEHist(2)->GetEventHist()->GetAxis(1, 0)->GetXbins()->GetArray();
 269
 270   Int_t nZvtxBins  = 7+1+7;
 271   // bins for second buffer are shifted by 100 cm
 272   Double_t vertexBins[] = { -7, -5, -3, -1, 1, 3, 5, 7, 93, 95, 97, 99, 101, 103, 105, 107 };
 273   Double_t* zvtxbin = vertexBins;
 274
 275   if (fHistos->GetUEHist(2)->GetEventHist()->GetNVar() > 2)
 276   {
 277     nZvtxBins = fHistos->GetUEHist(2)->GetEventHist()->GetNBins(2);
 278     zvtxbin = (Double_t*) fHistos->GetUEHist(2)->GetEventHist()->GetAxis(2, 0)->GetXbins()->GetArray();
 279   }
 280
 281   fPoolMgr = new AliEventPoolManager(poolsize, trackDepth, nCentralityBins, centralityBins, nZvtxBins, zvtxbin);
 282 }
 283
 284 //____________________________________________________________________
 285 void  AliAnalysisTaskPhiCorrelations::Exec(Option_t */*option*/)
 286 {
 287   // receive ESD pointer if we are not running AOD analysis
 288   if (!fAOD)
 289   {
 290     AliVEventHandler* handler = AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler();
 291     if (handler && handler->InheritsFrom("AliESDInputHandler"))
 292       fESD = ((AliESDInputHandler*)handler)->GetEvent();
 293   }
 294
 295   if (fMode)
 296   {
 297     // correction mode
 298
 299     if (fMcHandler)
 300       fMcEvent = fMcHandler->MCEvent();
 301
 302     if (fAOD)
 303     {
 304       // array of MC particles
 305       fArrayMC = dynamic_cast<TClonesArray*>(fAOD->FindListObject(AliAODMCParticle::StdBranchName()));
 306       if (!fArrayMC)
 307         AliFatal("No array of MC particles found !!!");
 308     }
 309
 310     AnalyseCorrectionMode();
 311   }
 312   else AnalyseDataMode();
 313 }
 314
 315 /******************** ANALYSIS METHODS *****************************/
 316
 317 //____________________________________________________________________
 318 void  AliAnalysisTaskPhiCorrelations::AddSettingsTree()
 319 {
 320   //Write settings to output list
 321   TTree *settingsTree   = new TTree("UEAnalysisSettings","Analysis Settings in UE estimation");
 322   settingsTree->Branch("fnTracksVertex", &fnTracksVertex,"nTracksVertex/I");
 323   settingsTree->Branch("fZVertex", &fZVertex,"ZVertex/D");
 324   //settingsTree->Branch("fCentralityMethod", fCentralityMethod.Data(),"CentralityMethod/C");
 325   settingsTree->Branch("fTrackEtaCut", &fTrackEtaCut, "TrackEtaCut/D");
 326   settingsTree->Branch("fOnlyOneEtaSide", &fOnlyOneEtaSide,"OnlyOneEtaSide/I");
 327   settingsTree->Branch("fPtMin", &fPtMin, "PtMin/D");
 328   settingsTree->Branch("fFilterBit", &fFilterBit,"FilterBit/I");
 329   settingsTree->Branch("fSelectBit", &fSelectBit,"EventSelectionBit/I");
 330   settingsTree->Branch("fUseChargeHadrons", &fUseChargeHadrons,"UseChHadrons/O");
 331   settingsTree->Branch("fSelectCharge", &fSelectCharge,"SelectCharge/I");
 332   settingsTree->Branch("fTriggerSelectCharge", &fTriggerSelectCharge,"TriggerSelectCharge/I");
 333   settingsTree->Branch("fTriggerRestrictEta", &fTriggerRestrictEta,"TriggerRestrictEta/D");
 334   settingsTree->Branch("fEtaOrdering", &fEtaOrdering,"EtaOrdering/O");
 335   settingsTree->Branch("fCutConversions", &fCutConversions,"CutConversions/O");
 336   settingsTree->Branch("fCutResonances", &fCutResonances,"CutResonances/O");
 337   settingsTree->Branch("fFillpT", &fFillpT,"FillpT/O");
 338   settingsTree->Branch("fkTrackingEfficiency", "TH1D", &fkTrackingEfficiency);
 339   settingsTree->Branch("fMixingTracks", &fMixingTracks,"MixingTracks/I");
 340   settingsTree->Branch("fSkipTrigger", &fSkipTrigger,"SkipTrigger/O");
 341   settingsTree->Branch("fInjectedSignals", &fInjectedSignals,"SkipTrigger/O");
 342   settingsTree->Branch("fRejectCentralityOutliers", &fRejectCentralityOutliers,"RejectCentralityOutliers/O");
 343
 344   settingsTree->Fill();
 345   fListOfHistos->Add(settingsTree);
 346 }
 347
 348 //____________________________________________________________________
 349 void  AliAnalysisTaskPhiCorrelations::AnalyseCorrectionMode()
 350 {
 351   // Run the analysis on MC to get the correction maps
 352   //
 353
 354   if ( fDebug > 3 ) AliInfo( " Processing event in Corrections mode ..." );
 355
 356   Double_t centrality = 0;
 357
 358   if (fCentralityMethod.Length() > 0)
 359   {
 360     AliCentrality *centralityObj = 0;
 361     if (fAOD)
 362       centralityObj = fAOD->GetHeader()->GetCentralityP();
 363     else if (fESD)
 364       centralityObj = fESD->GetCentrality();
 365
 366     if (centralityObj)
 367     {
 368       centrality = centralityObj->GetCentralityPercentileUnchecked(fCentralityMethod);
 369       AliInfo(Form("Centrality is %f", centrality));
 370     }
 371     else
 372     {
 373       Printf("WARNING: Centrality object is 0");
 374       centrality = -1;
 375      }
 376   }
 377
 378   // Support for ESD and AOD based analysis
 379   AliVEvent* inputEvent = fAOD;
 380   if (!inputEvent)
 381     inputEvent = fESD;
 382
 383   Float_t bSign = 0;
 384
 385   if (inputEvent)
 386   {
 387     fHistos->SetRunNumber(inputEvent->GetRunNumber());
 388     bSign = (inputEvent->GetMagneticField() > 0) ? 1 : -1;
 389   }
 390
 391   TObject* mc = fArrayMC;
 392   if (!mc)
 393     mc = fMcEvent;
 394
 395   // count all events
 396   fHistos->FillEvent(centrality, -1);
 397
 398   if (centrality < 0)
 399     return;
 400
 401   // Only consider MC events within the vtx-z region used also as cut on the reconstructed vertex
 402   TObject* vertexSupplier = fMcEvent;
 403   if (fAOD) // AOD
 404     vertexSupplier = fAOD->FindListObject(AliAODMCHeader::StdBranchName());
 405
 406   if (!fAnalyseUE->VertexSelection(vertexSupplier, 0, fZVertex))
 407     return;
 408
 409   Float_t zVtx = 0;
 410   if (fAOD)
 411     zVtx = ((AliAODMCHeader*) vertexSupplier)->GetVtxZ();
 412   else
 413     zVtx = fMcEvent->GetPrimaryVertex()->GetZ();
 414   Float_t weight = 1;
 415   if (fFillpT)
 416     weight = -1;
 417
 418   // For productions with injected signals, figure out above which label to skip particles/tracks
 419   Int_t skipParticlesAbove = 0;
 420   if (fInjectedSignals)
 421   {
 422     AliGenEventHeader* eventHeader = 0;
 423     Int_t headers = 0;
 424
 425     if (fMcEvent)
 426     {
 427       // ESD
 428       AliHeader* header = (AliHeader*) fMcEvent->Header();
 429       if (!header)
 430         AliFatal("fInjectedSignals set but no MC header found");
 431
 432       AliGenCocktailEventHeader* cocktailHeader = dynamic_cast<AliGenCocktailEventHeader*> (header->GenEventHeader());
 433       if (!cocktailHeader)
 434       {
 435         header->Dump();
 436         AliFatal("fInjectedSignals set but no MC cocktail header found");
 437       }
 438
 439       headers = cocktailHeader->GetHeaders()->GetEntries();
 440       eventHeader = dynamic_cast<AliGenEventHeader*> (cocktailHeader->GetHeaders()->First());
 441     }
 442     else
 443     {
 444       // AOD
 445       AliAODMCHeader* header = (AliAODMCHeader*) fAOD->GetList()->FindObject(AliAODMCHeader::StdBranchName());
 446       if (!header)
 447         AliFatal("fInjectedSignals set but no MC header found");
 448
 449       headers = header->GetNCocktailHeaders();
 450       eventHeader = header->GetCocktailHeader(0);
 451     }
 452
 453     if (!eventHeader)
 454     {
 455       // We avoid AliFatal here, because the AOD productions sometimes have events where the MC header is missing
 456       // (due to unreadable Kinematics) and we don't want to loose the whole job because of a few events
 457       AliError("First event header not found. Skipping this event.");
 458       fHistos->FillEvent(centrality, AliUEHist::kCFStepAnaTopology);
 459       return;
 460     }
 461
 462     skipParticlesAbove = eventHeader->NProduced();
 463     AliInfo(Form("Injected signals in this event (%d headers). Keeping events of %s. Will skip particles/tracks above %d.", headers, eventHeader->ClassName(), skipParticlesAbove));
 464   }
 465
 466   // Get MC primaries
 467   TObjArray* tmpList = fAnalyseUE->GetAcceptedParticles(mc, 0, kTRUE, -1, kTRUE);
 468   if (fInjectedSignals)
 469     fAnalyseUE->RemoveInjectedSignals(tmpList, mc, skipParticlesAbove);
 470   TObjArray* tracksMC = CloneAndReduceTrackList(tmpList);
 471   delete tmpList;
 472
 473   /*
 474   if (fAOD)
 475   {
 476     for (Int_t i=0; i<fArrayMC->GetEntriesFast(); i++)
 477       ((TH1F*) fListOfHistos->FindObject("pids"))->Fill(((AliAODMCParticle*) fArrayMC->At(i))->PdgCode());
 478   }
 479   else
 480   {
 481     for (Int_t i=0; i<fMcEvent->GetNumberOfTracks(); i++)
 482       ((TH1F*) fListOfHistos->FindObject("pids"))->Fill(fMcEvent->GetTrack(i)->PdgCode());
 483   }
 484   */
 485
 486   if (fFillOnlyStep0)
 487     zVtx = 0;
 488
 489   // (MC-true all particles)
 490   // STEP 0
 491   fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepAll, tracksMC, 0, weight);
 492
 493   // mixed event
 494   if (fFillMixed)
 495   {
 496     AliEventPool* pool = fPoolMgr->GetEventPool(centrality, zVtx);
 497     //pool->PrintInfo();
 498     if (pool->IsReady() || pool->NTracksInPool() > fMixingTracks / 10 || pool->GetCurrentNEvents() >= 5)
 499       for (Int_t jMix=0; jMix<pool->GetCurrentNEvents(); jMix++)
 500         fHistosMixed->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepAll, tracksMC, pool->GetEvent(jMix), 1.0 / pool->GetCurrentNEvents(), (jMix == 0));
 501     pool->UpdatePool(CloneAndReduceTrackList(tracksMC));
 502   }
 503
 504 //   Printf("trigger: %d", ((AliInputEventHandler*)fInputHandler)->IsEventSelected());
 505
 506   // Trigger selection ************************************************
 507   if (!fFillOnlyStep0 && (fSkipTrigger || fAnalyseUE->TriggerSelection(fInputHandler)))
 508   {
 509     // (MC-true all particles)
 510     // STEP 1
 511     if (!fReduceMemoryFootprint)
 512       fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepTriggered, tracksMC, 0, weight);
 513     else
 514       fHistos->FillEvent(centrality, AliUEHist::kCFStepTriggered);
 515
 516     if (!inputEvent) {
 517       AliFatal("UNEXPECTED: inputEvent is 0. Trigger selection should have failed");
 518       return;
 519     }
 520
 521     // Vertex selection *************************************************
 522     if (fAnalyseUE->VertexSelection(inputEvent, fnTracksVertex, fZVertex))
 523     {
 524       // fill here for tracking efficiency
 525       // loop over particle species
 526
 527       for (Int_t particleSpecies = 0; particleSpecies < 4; particleSpecies++)
 528       {
 529         TObjArray* primMCParticles = fAnalyseUE->GetAcceptedParticles(mc, 0x0, kTRUE, particleSpecies, kTRUE);
 530         TObjArray* primRecoTracksMatched = fAnalyseUE->GetAcceptedParticles(inputEvent, mc, kTRUE, particleSpecies, kTRUE);
 531         TObjArray* allRecoTracksMatched = fAnalyseUE->GetAcceptedParticles(inputEvent, mc, kFALSE, particleSpecies, kTRUE);
 532
 533         if (fInjectedSignals)
 534         {
 535           fAnalyseUE->RemoveInjectedSignals(primMCParticles, mc, skipParticlesAbove);
 536           fAnalyseUE->RemoveInjectedSignals(primRecoTracksMatched, mc, skipParticlesAbove);
 537           fAnalyseUE->RemoveInjectedSignals(allRecoTracksMatched, mc, skipParticlesAbove);
 538         }
 539
 540         fHistos->FillTrackingEfficiency(primMCParticles, primRecoTracksMatched, allRecoTracksMatched, 0, particleSpecies, centrality);
 541
 542 //      Printf("%d --> %d %d %d", particleSpecies, primMCParticles->GetEntries(), primRecoTracksMatched->GetEntries(), allRecoTracksMatched->GetEntries());
 543
 544         delete primMCParticles;
 545         delete primRecoTracksMatched;
 546         delete allRecoTracksMatched;
 547       }
 548       TObjArray* fakeParticles = fAnalyseUE->GetFakeParticles(inputEvent, mc, kFALSE, -1, kTRUE);
 549       if (fInjectedSignals)
 550       {
 551         fAnalyseUE->RemoveInjectedSignals((TObjArray*) fakeParticles->At(0), mc, skipParticlesAbove);
 552         fAnalyseUE->RemoveInjectedSignals((TObjArray*) fakeParticles->At(1), mc, skipParticlesAbove);
 553       }
 554       fHistos->FillTrackingEfficiency(0, 0, 0, (TObjArray*) fakeParticles->At(2), -1, centrality);
 555       fHistos->FillFakePt(fakeParticles, centrality);
 556 //       Printf(">>>>> %d %d %d fakes", ((TObjArray*) fakeParticles->At(0))->GetEntriesFast(), ((TObjArray*) fakeParticles->At(1))->GetEntriesFast(), ((TObjArray*) fakeParticles->At(2))->GetEntriesFast());
 557       delete fakeParticles;
 558
 559       // (MC-true all particles)
 560       // STEP 2
 561       if (!fReduceMemoryFootprint)
 562         fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepVertex, tracksMC, 0, weight);
 563       else
 564         fHistos->FillEvent(centrality, AliUEHist::kCFStepVertex);
 565
 566       // Get MC primaries that match reconstructed track
 567       TObjArray* tracksRecoMatchedPrim = fAnalyseUE->GetAcceptedParticles(inputEvent, mc, kTRUE, -1, kTRUE);
 568       if (fInjectedSignals)
 569         fAnalyseUE->RemoveInjectedSignals(tracksRecoMatchedPrim, mc, skipParticlesAbove);
 570
 571       // (RECO-matched (quantities from MC particle) primary particles)
 572       // STEP 4
 573       fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepTrackedOnlyPrim, tracksRecoMatchedPrim, 0, weight);
 574
 575       // Get MC primaries + secondaries that match reconstructed track
 576       TObjArray* tracksRecoMatchedAll = fAnalyseUE->GetAcceptedParticles(inputEvent, mc, kFALSE, -1, kTRUE);
 577       if (fInjectedSignals)
 578         fAnalyseUE->RemoveInjectedSignals(tracksRecoMatchedAll, mc, skipParticlesAbove);
 579
 580       // (RECO-matched (quantities from MC particle) all particles)
 581       // STEP 5
 582       fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepTracked, tracksRecoMatchedAll, 0, weight);
 583
 584       // Get RECO tracks
 585       TObjArray* tracks = fAnalyseUE->GetAcceptedParticles(inputEvent, 0, kTRUE, -1, kTRUE);
 586       if (fInjectedSignals)
 587         fAnalyseUE->RemoveInjectedSignals(tracks, mc, skipParticlesAbove);
 588
 589       // (RECO all tracks)
 590       // STEP 6
 591       if (!fSkipStep6)
 592         fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepReconstructed, tracks, 0, weight);
 593
 594       // two track cut, STEP 8
 595       if (fTwoTrackEfficiencyCut > 0)
 596         fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepBiasStudy, tracks, 0, weight, kTRUE, kTRUE, bSign, fTwoTrackEfficiencyCut);
 597
 598       // mixed event
 599       if (fFillMixed && !fSkipStep6)
 600       {
 601         AliEventPool* pool2 = fPoolMgr->GetEventPool(centrality, zVtx + 100);
 602         //pool2->PrintInfo();
 603         if (pool2->IsReady() || pool2->NTracksInPool() > fMixingTracks / 10 || pool2->GetCurrentNEvents() >= 5)
 604           for (Int_t jMix=0; jMix<pool2->GetCurrentNEvents(); jMix++)
 605           {
 606             // STEP 6
 607             fHistosMixed->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepReconstructed, tracks, pool2->GetEvent(jMix), 1.0 / pool2->GetCurrentNEvents(), (jMix == 0));
 608
 609             // two track cut, STEP 8
 610             if (fTwoTrackEfficiencyCut > 0)
 611               fHistosMixed->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepBiasStudy, tracks, pool2->GetEvent(jMix), 1.0 / pool2->GetCurrentNEvents(), (jMix == 0), kTRUE, bSign, fTwoTrackEfficiencyCut);
 612           }
 613         pool2->UpdatePool(CloneAndReduceTrackList(tracks));
 614       }
 615
 616       if (0 && !fReduceMemoryFootprint)
 617       {
 618         // make list of secondaries (matched with MC)
 619         TObjArray* tracksRecoMatchedSecondaries = new TObjArray;
 620         for (Int_t i=0; i<tracksRecoMatchedAll->GetEntriesFast(); i++)
 621           if (((AliAODMCParticle*)tracksRecoMatchedAll->At(i))->IsPhysicalPrimary() == kFALSE)
 622             tracksRecoMatchedSecondaries->Add(tracksRecoMatchedAll->At(i));
 623
 624         // Study: Use only secondaries as trigger particles and plot the correlation vs. all particles; store in step 9
 625         fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepBiasStudy2, tracksRecoMatchedSecondaries, tracksRecoMatchedAll, weight);
 626
 627         // Study: Use only primaries as trigger particles and plot the correlation vs. secondaries; store in step 8
 628         fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepBiasStudy, tracksRecoMatchedPrim, tracksRecoMatchedSecondaries, weight);
 629
 630         // plot delta phi vs process id of secondaries
 631         // trigger particles: primaries in 4 < pT < 10
 632         // associated particles: secondaries in 1 < pT < 10
 633
 634         for (Int_t i=0; i<tracksRecoMatchedPrim->GetEntriesFast(); i++)
 635         {
 636           AliVParticle* triggerParticle = (AliVParticle*) tracksRecoMatchedPrim->At(i);
 637
 638           if (triggerParticle->Pt() < 4 || triggerParticle->Pt() > 10)
 639             continue;
 640
 641           for (Int_t j=0; j<tracksRecoMatchedSecondaries->GetEntriesFast(); j++)
 642           {
 643             AliAODMCParticle* particle = (AliAODMCParticle*) tracksRecoMatchedSecondaries->At(j);
 644
 645             if (particle->Pt() < 1 || particle->Pt() > 10)
 646               continue;
 647
 648             if (particle->Pt() > triggerParticle->Pt())
 649               continue;
 650
 651             Double_t deltaPhi = triggerParticle->Phi() - particle->Phi();
 652             if (deltaPhi > 1.5 * TMath::Pi())
 653               deltaPhi -= TMath::TwoPi();
 654             if (deltaPhi < -0.5 * TMath::Pi())
 655               deltaPhi += TMath::TwoPi();
 656
 657             Int_t processID = fMcEvent->Stack()->Particle(particle->GetLabel())->GetUniqueID();
 658
 659             ((TH2F*) fListOfHistos->FindObject("processIDs"))->Fill(deltaPhi, processID);
 660           }
 661         }
 662
 663         delete tracksRecoMatchedSecondaries;
 664       }
 665
 666       delete tracksRecoMatchedPrim;
 667       delete tracksRecoMatchedAll;
 668       delete tracks;
 669     }
 670   }
 671
 672   delete tracksMC;
 673 }
 674
 675 //____________________________________________________________________
 676 void  AliAnalysisTaskPhiCorrelations::AnalyseDataMode()
 677 {
 678
 679   // Run the analysis on DATA or MC to get raw distributions
 680
 681   if ( fDebug > 3 ) AliInfo( " Processing event in Data mode ..." );
 682
 683   ((TH1F*) fListOfHistos->FindObject("eventStat"))->Fill(0);
 684
 685   if (!fInputHandler)
 686     return;
 687
 688   // skip not selected events here (the AOD is not updated for those)
 689   if (!fSkipTrigger && !(fInputHandler->IsEventSelected() & fSelectBit))
 690     return;
 691
 692   // Support for ESD and AOD based analysis
 693   AliVEvent* inputEvent = fAOD;
 694   if (!inputEvent)
 695     inputEvent = fESD;
 696
 697   Double_t centrality = 0;
 698
 699   AliCentrality *centralityObj = 0;
 700   if (fCentralityMethod.Length() > 0)
 701   {
 702     if (fCentralityMethod == "ZNA_MANUAL")
 703     {
 704       Bool_t zna = kFALSE;
 705       for(Int_t j = 0; j < 4; ++j) {
 706         if (fESD->GetZDCData()->GetZDCTDCData(12,j) != 0) {
 707           zna = kTRUE;
 708         }
 709       }
 710
 711 //       Printf("%d %f", zna, fZNAtower[0]);
 712       if (zna)
 713       {
 714         // code from Chiara O (23.10.12)
 715         const Double_t *fZNAtower = fESD->GetZDCData()->GetZN2TowerEnergy();
 716         Float_t znacut[4] = {681., 563., 413., 191.};
 717
 718         if(fZNAtower[0]>znacut[0]) centrality = 1;
 719         else if(fZNAtower[0]>znacut[1]) centrality = 21;
 720         else if(fZNAtower[0]>znacut[2]) centrality = 41;
 721         else if(fZNAtower[0]>znacut[3]) centrality = 61;
 722         else centrality = 81;
 723       }
 724       else
 725         centrality = -1;
 726     }
 727     else if (fCentralityMethod == "TRACKS_MANUAL")
 728     {
 729       // for pp
 730       TObjArray* tracks = fAnalyseUE->GetAcceptedParticles(inputEvent, 0, kTRUE, -1, kTRUE);
 731       centrality = tracks->GetEntriesFast();
 732       if (centrality > 40)
 733         centrality = 41;
 734 //       Printf("%d %f", tracks->GetEntriesFast(), centrality);
 735       delete tracks;
 736     }
 737     else
 738     {
 739       if (fAOD)
 740         centralityObj = fAOD->GetHeader()->GetCentralityP();
 741       else if (fESD)
 742         centralityObj = fESD->GetCentrality();
 743
 744       if (centralityObj)
 745         centrality = centralityObj->GetCentralityPercentile(fCentralityMethod);
 746         //centrality = centralityObj->GetCentralityPercentileUnchecked(fCentralityMethod);
 747       else
 748         centrality = -1;
 749
 750       if (fAOD)
 751       {
 752         // remove outliers
 753         if (centrality == 0)
 754         {
 755           if (fAOD->GetVZEROData())
 756           {
 757             Float_t multV0 = 0;
 758             for (Int_t i=0; i<64; i++)
 759               multV0 += fAOD->GetVZEROData()->GetMultiplicity(i);
 760             if (multV0 < 19500)
 761             {
 762               centrality = -1;
 763               AliInfo("Rejecting event due to too small V0 multiplicity");
 764             }
 765           }
 766         }
 767       }
 768     }
 769
 770     AliInfo(Form("Centrality is %f", centrality));
 771   }
 772
 773   Float_t bSign = (inputEvent->GetMagneticField() > 0) ? 1 : -1;
 774
 775   fHistos->SetRunNumber(inputEvent->GetRunNumber());
 776
 777   // Fill the "event-counting-container", it is needed to get the number of events remaining after each event-selection cut
 778   fHistos->FillEvent(centrality, AliUEHist::kCFStepAll);
 779
 780   // Trigger selection ************************************************
 781   if (!fSkipTrigger && !fAnalyseUE->TriggerSelection(fInputHandler)) return;
 782
 783   // Fill the "event-counting-container", it is needed to get the number of events remaining after each event-selection cut
 784   fHistos->FillEvent(centrality, AliUEHist::kCFStepTriggered);
 785
 786   // Vertex selection *************************************************
 787   if(!fAnalyseUE->VertexSelection(inputEvent, fnTracksVertex, fZVertex)) return;
 788
 789   // Fill the "event-counting-container", it is needed to get the number of events remaining after each event-selection cut
 790   fHistos->FillEvent(centrality, AliUEHist::kCFStepVertex);
 791
 792   // optimization
 793   if (centrality < 0 && !fCompareCentralities)
 794     return;
 795
 796   TObjArray* tracks = fAnalyseUE->GetAcceptedParticles(inputEvent, 0, kTRUE, -1, kTRUE);
 797
 798   // check for outlier in centrality vs number of tracks (rough constants extracted from correlation histgram)
 799   Bool_t reject = kFALSE;
 800   if (fRejectCentralityOutliers)
 801   {
 802     if (centrality > 40 && centrality <= 50 && tracks->GetEntriesFast() > 1160)
 803       reject = kTRUE;
 804     if (centrality > 50 && centrality <= 60 && tracks->GetEntriesFast() > 650)
 805       reject = kTRUE;
 806     if (centrality > 60 && centrality <= 70 && tracks->GetEntriesFast() > 370)
 807       reject = kTRUE;
 808     if (centrality > 70 && centrality <= 80 && tracks->GetEntriesFast() > 220)
 809       reject = kTRUE;
 810     if (centrality > 80 && centrality <= 90 && tracks->GetEntriesFast() > 130)
 811       reject = kTRUE;
 812     if (centrality > 90 && tracks->GetEntriesFast() > 75)
 813       reject = kTRUE;
 814   }
 815
 816   if (reject)
 817   {
 818     AliInfo(Form("Rejecting event due to centrality vs tracks correlation: %f %d", centrality, tracks->GetEntriesFast()));
 819     fHistos->FillEvent(centrality, AliUEHist::kCFStepAnaTopology);
 820     delete tracks;
 821     return;
 822   }
 823
 824   // reference multiplicity
 825   Int_t referenceMultiplicity = -1;
 826   if (fESD)
 827     referenceMultiplicity = AliESDtrackCuts::GetReferenceMultiplicity(fESD);
 828
 829   ((TH2F*) fListOfHistos->FindObject("referenceMultiplicity"))->Fill(centrality, referenceMultiplicity);
 830
 831   // create a list of reduced objects. This speeds up processing and reduces memory consumption for the event pool
 832   TObjArray* tracksClone = CloneAndReduceTrackList(tracks);
 833   delete tracks;
 834
 835   //Printf("Accepted %d tracks", tracks->GetEntries());
 836
 837   const AliVVertex* vertex = inputEvent->GetPrimaryVertex();
 838   Double_t zVtx = vertex->GetZ();
 839
 840   Float_t weight = 1;
 841   if (fFillpT)
 842     weight = -1;
 843
 844   // fill two different centralities (syst study)
 845   // the zvtx axis is used to distinguish the results of both centralities: configured centrality in zvtx = 0, SPD in zvtx = 2
 846   if (fCompareCentralities)
 847     zVtx = 0;
 848
 849   // Fill containers at STEP 6 (reconstructed)
 850   if (centrality >= 0)
 851   {
 852     if (!fSkipStep6)
 853       fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepReconstructed, tracksClone, 0, weight);
 854
 855     ((TH1F*) fListOfHistos->FindObject("eventStat"))->Fill(1);
 856
 857     if (fTwoTrackEfficiencyCut > 0)
 858       fHistos->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepBiasStudy, tracksClone, 0, weight, kTRUE, kTRUE, bSign, fTwoTrackEfficiencyCut);
 859   }
 860
 861   // fill second time with SPD centrality
 862   if (fCompareCentralities && centralityObj)
 863   {
 864     centrality = centralityObj->GetCentralityPercentile("CL1");
 865     if (centrality >= 0 && !fSkipStep6)
 866       fHistos->FillCorrelations(centrality, 2, AliUEHist::kCFStepReconstructed, tracksClone, 0, weight);
 867   }
 868
 869   if (fFillMixed)
 870   {
 871     // event mixing
 872
 873     // 1. First get an event pool corresponding in mult (cent) and
 874     //    zvertex to the current event. Once initialized, the pool
 875     //    should contain nMix (reduced) events. This routine does not
 876     //    pre-scan the chain. The first several events of every chain
 877     //    will be skipped until the needed pools are filled to the
 878     //    specified depth. If the pool categories are not too rare, this
 879     //    should not be a problem. If they are rare, you could lose
 880     //    statistics.
 881
 882     // 2. Collect the whole pool's content of tracks into one TObjArray
 883     //    (bgTracks), which is effectively a single background super-event.
 884
 885     // 3. The reduced and bgTracks arrays must both be passed into
 886     //    FillCorrelations(). Also nMix should be passed in, so a weight
 887     //    of 1./nMix can be applied.
 888
 889     AliEventPool* pool = fPoolMgr->GetEventPool(centrality, zVtx);
 890
 891     if (!pool)
 892       AliFatal(Form("No pool found for centrality = %f, zVtx = %f", centrality, zVtx));
 893
 894     //pool->SetDebug(1);
 895
 896     if (pool->IsReady() || pool->NTracksInPool() > fMixingTracks / 10 || pool->GetCurrentNEvents() >= 5)
 897     {
 898
 899       Int_t nMix = pool->GetCurrentNEvents();
 900 //       cout << "nMix = " << nMix << " tracks in pool = " << pool->NTracksInPool() << endl;
 901
 902       ((TH1F*) fListOfHistos->FindObject("eventStat"))->Fill(2);
 903       ((TH2F*) fListOfHistos->FindObject("mixedDist"))->Fill(centrality, pool->NTracksInPool());
 904       if (pool->IsReady())
 905         ((TH1F*) fListOfHistos->FindObject("eventStat"))->Fill(3);
 906
 907       // Fill mixed-event histos here
 908       for (Int_t jMix=0; jMix<nMix; jMix++)
 909       {
 910         TObjArray* bgTracks = pool->GetEvent(jMix);
 911
 912         if (!fSkipStep6)
 913           fHistosMixed->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepReconstructed, tracksClone, bgTracks, 1.0 / nMix, (jMix == 0));
 914
 915         if (fTwoTrackEfficiencyCut > 0)
 916           fHistosMixed->FillCorrelations(centrality, zVtx, AliUEHist::kCFStepBiasStudy, tracksClone, bgTracks, 1.0 / nMix, (jMix == 0), kTRUE, bSign, fTwoTrackEfficiencyCut);
 917       }
 918     }
 919
 920     // ownership is with the pool now
 921     pool->UpdatePool(tracksClone);
 922     //pool->PrintInfo();
 923   }
 924   else
 925     delete tracksClone;
 926 }
 927
 928 TObjArray* AliAnalysisTaskPhiCorrelations::CloneAndReduceTrackList(TObjArray* tracks)
 929 {
 930   // clones a track list by using AliDPhiBasicParticle which uses much less memory (used for event mixing)
 931
 932   TObjArray* tracksClone = new TObjArray;
 933   tracksClone->SetOwner(kTRUE);
 934
 935   for (Int_t i=0; i<tracks->GetEntriesFast(); i++)
 936   {
 937     AliVParticle* particle = (AliVParticle*) tracks->At(i);
 938     tracksClone->Add(new AliDPhiBasicParticle(particle->Eta(), particle->Phi(), particle->Pt(), particle->Charge()));
 939   }
 940
 941   return tracksClone;
 942 }
 943
 944 //____________________________________________________________________
 945 void  AliAnalysisTaskPhiCorrelations::Initialize()
 946 {
 947   // input handler
 948   fInputHandler = (AliInputEventHandler*)
 949          ((AliAnalysisManager::GetAnalysisManager())->GetInputEventHandler());
 950   // MC handler
 951   fMcHandler = dynamic_cast<AliMCEventHandler*> (AliAnalysisManager::GetAnalysisManager()->GetMCtruthEventHandler());
 952 }