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