PWGCF/EBYE/BalanceFunctions/AliAnalysisTaskTriggeredBF.cxx

   1 #include <vector>\r
   2 #include "TChain.h"\r
   3 #include "TList.h"\r
   4 #include "TCanvas.h"\r
   5 #include "TLorentzVector.h"\r
   6 #include "TGraphErrors.h"\r
   7 #include "TH1F.h"\r
   8 #include "TH2F.h"\r
   9 #include "TArrayF.h"\r
  10 #include "TF1.h"\r
  11 #include "TRandom.h"\r
  12 \r
  13 #include "AliLog.h"\r
  14 \r
  15 #include "AliAnalysisTaskSE.h"\r
  16 #include "AliAnalysisManager.h"\r
  17 \r
  18 #include "AliESDVertex.h"\r
  19 #include "AliESDEvent.h"\r
  20 #include "AliESDInputHandler.h"\r
  21 #include "AliAODEvent.h"\r
  22 #include "AliAODTrack.h"\r
  23 #include "AliAODInputHandler.h"\r
  24 #include "AliGenEventHeader.h"\r
  25 #include "AliGenHijingEventHeader.h"\r
  26 #include "AliMCEventHandler.h"\r
  27 #include "AliMCEvent.h"\r
  28 #include "AliMixInputEventHandler.h"\r
  29 #include "AliStack.h"\r
  30 \r
  31 #include "TH2D.h"    \r
  32 #include "AliTHn.h"             \r
  33 \r
  34 #include "AliEventPoolManager.h" \r
  35 \r
  36 #include "AliAnalysisTaskTriggeredBF.h"\r
  37 #include "AliBalanceTriggered.h"\r
  38 \r
  39 \r
  40 // Analysis task for the TriggeredBF code\r
  41 // Authors: Panos.Christakoglou@nikhef.nl, m.weber@cern.ch\r
  42 \r
  43 using std::cout;\r
  44 using std::endl;\r
  45 using std::vector;\r
  46 \r
  47 ClassImp(AliAnalysisTaskTriggeredBF)\r
  48 \r
  49 //________________________________________________________________________\r
  50 AliAnalysisTaskTriggeredBF::AliAnalysisTaskTriggeredBF(const char *name) \r
  51 : AliAnalysisTaskSE(name), \r
  52   fBalance(0),\r
  53   fRunShuffling(kFALSE),\r
  54   fShuffledBalance(0),\r
  55   fRunMixing(kFALSE),\r
  56   fMixingTracks(50000),\r
  57   fMixedBalance(0),\r
  58   fPoolMgr(0),\r
  59   fList(0),\r
  60   fListTriggeredBF(0),\r
  61   fListTriggeredBFS(0),\r
  62   fListTriggeredBFM(0),\r
  63   fHistListPIDQA(0),\r
  64   fHistEventStats(0),\r
  65   fHistCentStats(0),\r
  66   fHistTriggerStats(0),\r
  67   fHistTrackStats(0),\r
  68   fHistVx(0),\r
  69   fHistVy(0),\r
  70   fHistVz(0),\r
  71   fHistClus(0),\r
  72   fHistDCA(0),\r
  73   fHistChi2(0),\r
  74   fHistPt(0),\r
  75   fHistEta(0),\r
  76   fHistPhi(0),\r
  77   fHistPhiBefore(0),\r
  78   fHistPhiAfter(0),\r
  79   fHistV0M(0),\r
  80   fHistRefTracks(0),\r
  81   fCentralityEstimator("V0M"),\r
  82   fUseCentrality(kFALSE),\r
  83   fCentralityPercentileMin(0.), \r
  84   fCentralityPercentileMax(5.),\r
  85   fImpactParameterMin(0.),\r
  86   fImpactParameterMax(20.),\r
  87   fUseMultiplicity(kFALSE),\r
  88   fNumberOfAcceptedTracksMin(0),\r
  89   fNumberOfAcceptedTracksMax(10000),\r
  90   fHistNumberOfAcceptedTracks(0),\r
  91   fUseOfflineTrigger(kFALSE),\r
  92   fVxMax(0.3),\r
  93   fVyMax(0.3),\r
  94   fVzMax(10.),\r
  95   nAODtrackCutBit(128),\r
  96   fPtMin(0.3),\r
  97   fPtMax(1.5),\r
  98   fEtaMin(-0.8),\r
  99   fEtaMax(-0.8),\r
 100   fDCAxyCut(-1),\r
 101   fDCAzCut(-1),\r
 102   fTPCchi2Cut(-1),\r
 103   fNClustersTPCCut(-1)\r
 104 {\r
 105   // Constructor\r
 106   // Define input and output slots here\r
 107   // Input slot #0 works with a TChain\r
 108   DefineInput(0, TChain::Class());\r
 109   // Output slot #0 writes into a TH1 container\r
 110   DefineOutput(1, TList::Class());\r
 111   DefineOutput(2, TList::Class());\r
 112   DefineOutput(3, TList::Class());\r
 113   DefineOutput(4, TList::Class());\r
 114 }\r
 115 \r
 116 //________________________________________________________________________\r
 117 AliAnalysisTaskTriggeredBF::~AliAnalysisTaskTriggeredBF() {\r
 118 \r
 119   // Destructor\r
 120 \r
 121 }\r
 122 \r
 123 //________________________________________________________________________\r
 124 void AliAnalysisTaskTriggeredBF::UserCreateOutputObjects() {\r
 125   // Create histograms\r
 126   // Called once\r
 127   if(!fBalance) {\r
 128     fBalance = new AliBalanceTriggered();\r
 129     fBalance->SetAnalysisLevel("AOD");\r
 130   }\r
 131   if(fRunShuffling) {\r
 132     if(!fShuffledBalance) {\r
 133       fShuffledBalance = new AliBalanceTriggered();\r
 134       fShuffledBalance->SetAnalysisLevel("AOD");\r
 135     }\r
 136   }\r
 137   if(fRunMixing) {\r
 138     if(!fMixedBalance) {\r
 139       fMixedBalance = new AliBalanceTriggered();\r
 140       fMixedBalance->SetAnalysisLevel("AOD");\r
 141     }\r
 142   }\r
 143 \r
 144   //QA list\r
 145   fList = new TList();\r
 146   fList->SetName("listQA");\r
 147   fList->SetOwner();\r
 148 \r
 149   //Balance Function list\r
 150   fListTriggeredBF = new TList();\r
 151   fListTriggeredBF->SetName("listTriggeredBF");\r
 152   fListTriggeredBF->SetOwner();\r
 153 \r
 154   if(fRunShuffling) {\r
 155     fListTriggeredBFS = new TList();\r
 156     fListTriggeredBFS->SetName("listTriggeredBFShuffled");\r
 157     fListTriggeredBFS->SetOwner();\r
 158   }\r
 159   if(fRunMixing) {\r
 160     fListTriggeredBFM = new TList();\r
 161     fListTriggeredBFM->SetName("listTriggeredBFMixed");\r
 162     fListTriggeredBFM->SetOwner();\r
 163   }\r
 164   \r
 165   \r
 166   //Event stats.\r
 167   TString gCutName[4] = {"Total","Offline trigger",\r
 168                          "Vertex","Analyzed"};\r
 169   fHistEventStats = new TH1F("fHistEventStats",\r
 170                              "Event statistics;;N_{events}",\r
 171                              4,0.5,4.5);\r
 172   for(Int_t i = 1; i <= 4; i++)\r
 173     fHistEventStats->GetXaxis()->SetBinLabel(i,gCutName[i-1].Data());\r
 174   fList->Add(fHistEventStats);\r
 175   \r
 176   TString gCentName[9] = {"V0M","FMD","TRK","TKL","CL0","CL1","V0MvsFMD","TKLvsV0M","ZEMvsZDC"};\r
 177   fHistCentStats = new TH2F("fHistCentStats",\r
 178                             "Centrality statistics;;Cent percentile",\r
 179                             9,-0.5,8.5,220,-5,105);\r
 180   for(Int_t i = 1; i <= 9; i++)\r
 181     fHistCentStats->GetXaxis()->SetBinLabel(i,gCentName[i-1].Data());\r
 182   fList->Add(fHistCentStats);\r
 183   \r
 184   fHistTriggerStats = new TH1F("fHistTriggerStats","Trigger statistics;TriggerBit;N_{events}",130,0,130);\r
 185   fList->Add(fHistTriggerStats);\r
 186   \r
 187   fHistTrackStats = new TH1F("fHistTrackStats","Event statistics;TrackFilterBit;N_{events}",130,0,130);\r
 188   fList->Add(fHistTrackStats);\r
 189 \r
 190   fHistNumberOfAcceptedTracks = new TH1F("fHistNumberOfAcceptedTracks",";N_{acc.};Entries",4001,-0.5,4000.5);\r
 191   fList->Add(fHistNumberOfAcceptedTracks);\r
 192 \r
 193   // Vertex distributions\r
 194   fHistVx = new TH1F("fHistVx","Primary vertex distribution - x coordinate;V_{x} (cm);Entries",100,-0.5,0.5);\r
 195   fList->Add(fHistVx);\r
 196   fHistVy = new TH1F("fHistVy","Primary vertex distribution - y coordinate;V_{y} (cm);Entries",100,-0.5,0.5);\r
 197   fList->Add(fHistVy);\r
 198   fHistVz = new TH1F("fHistVz","Primary vertex distribution - z coordinate;V_{z} (cm);Entries",100,-20.,20.);\r
 199   fList->Add(fHistVz);\r
 200 \r
 201   // QA histograms\r
 202   fHistClus = new TH2F("fHistClus","# Cluster (TPC vs. ITS)",10,0,10,200,0,200);\r
 203   fList->Add(fHistClus);\r
 204   fHistChi2 = new TH1F("fHistChi2","Chi2/NDF distribution",200,0,10);\r
 205   fList->Add(fHistChi2);\r
 206   fHistDCA  = new TH2F("fHistDCA","DCA (xy vs. z)",400,-5,5,400,-5,5); \r
 207   fList->Add(fHistDCA);\r
 208   fHistPt   = new TH1F("fHistPt","p_{T} distribution",200,0,10);\r
 209   fList->Add(fHistPt);\r
 210   fHistEta  = new TH1F("fHistEta","#eta distribution",200,-2,2);\r
 211   fList->Add(fHistEta);\r
 212   fHistPhi  = new TH1F("fHistPhi","#phi distribution",200,-20,380);\r
 213   fList->Add(fHistPhi);\r
 214   fHistPhiBefore  = new TH1F("fHistPhiBefore","#phi distribution",200,0.,2*TMath::Pi());\r
 215   fList->Add(fHistPhiBefore);\r
 216   fHistPhiAfter  = new TH1F("fHistPhiAfter","#phi distribution",200,0.,2*TMath::Pi());\r
 217   fList->Add(fHistPhiAfter);\r
 218   fHistV0M  = new TH2F("fHistV0M","V0 Multiplicity C vs. A",500, 0, 20000, 500, 0, 20000);\r
 219   fList->Add(fHistV0M);\r
 220   TString gRefTrackName[6] = {"tracks","tracksPos","tracksNeg","tracksTPConly","clusITS0","clusITS1"};\r
 221   fHistRefTracks  = new TH2F("fHistRefTracks","Nr of Ref tracks/event vs. ref track estimator;;Nr of tracks",6, 0, 6, 400, 0, 20000);\r
 222   for(Int_t i = 1; i <= 6; i++)\r
 223     fHistRefTracks->GetXaxis()->SetBinLabel(i,gRefTrackName[i-1].Data());\r
 224   fList->Add(fHistRefTracks);\r
 225 \r
 226 \r
 227 \r
 228   // Balance function histograms\r
 229   // Initialize histograms if not done yet\r
 230   if(!fBalance->GetHistNp()){\r
 231     AliWarning("Histograms not yet initialized! --> Will be done now");\r
 232     AliWarning("--> Add 'gBalance->InitHistograms()' in your configBalanceFunction");\r
 233     fBalance->InitHistograms();\r
 234   }\r
 235 \r
 236   if(fRunShuffling) {\r
 237     if(!fShuffledBalance->GetHistNp()) {\r
 238       AliWarning("Histograms (shuffling) not yet initialized! --> Will be done now");\r
 239       AliWarning("--> Add 'gBalance->InitHistograms()' in your configBalanceFunction");\r
 240       fShuffledBalance->InitHistograms();\r
 241     }\r
 242   }\r
 243 \r
 244   if(fRunMixing) {\r
 245     if(!fMixedBalance->GetHistNp()) {\r
 246       AliWarning("Histograms (mixing) not yet initialized! --> Will be done now");\r
 247       AliWarning("--> Add 'gBalance->InitHistograms()' in your configBalanceFunction");\r
 248       fMixedBalance->InitHistograms();\r
 249     }\r
 250   }\r
 251 \r
 252   fListTriggeredBF->Add(fBalance->GetHistNp());\r
 253   fListTriggeredBF->Add(fBalance->GetHistNn());\r
 254   fListTriggeredBF->Add(fBalance->GetHistNpn());\r
 255   fListTriggeredBF->Add(fBalance->GetHistNnn());\r
 256   fListTriggeredBF->Add(fBalance->GetHistNpp());\r
 257   fListTriggeredBF->Add(fBalance->GetHistNnp());\r
 258   \r
 259   if(fRunShuffling) {\r
 260     fListTriggeredBFS->Add(fShuffledBalance->GetHistNp());\r
 261     fListTriggeredBFS->Add(fShuffledBalance->GetHistNn());\r
 262     fListTriggeredBFS->Add(fShuffledBalance->GetHistNpn());\r
 263     fListTriggeredBFS->Add(fShuffledBalance->GetHistNnn());\r
 264     fListTriggeredBFS->Add(fShuffledBalance->GetHistNpp());\r
 265     fListTriggeredBFS->Add(fShuffledBalance->GetHistNnp());\r
 266   }  \r
 267 \r
 268   if(fRunMixing) {\r
 269     fListTriggeredBFM->Add(fMixedBalance->GetHistNp());\r
 270     fListTriggeredBFM->Add(fMixedBalance->GetHistNn());\r
 271     fListTriggeredBFM->Add(fMixedBalance->GetHistNpn());\r
 272     fListTriggeredBFM->Add(fMixedBalance->GetHistNnn());\r
 273     fListTriggeredBFM->Add(fMixedBalance->GetHistNpp());\r
 274     fListTriggeredBFM->Add(fMixedBalance->GetHistNnp());\r
 275   }  \r
 276 \r
 277 \r
 278   // Event Mixing\r
 279   Int_t trackDepth = fMixingTracks; \r
 280   Int_t poolsize   = 1000;  // Maximum number of events, ignored in the present implemented of AliEventPoolManager\r
 281    \r
 282   Double_t centralityBins[] = {0.,1.,2.,3.,4.,5.,6.,7.,8.,9.,10.,15.,20.,25.,30.,35.,40.,45.,50.,55.,60.,65.,70.,75.,80.,90.,100.}; // SHOULD BE DEDUCED FROM CREATED ALITHN!!!\r
 283   Double_t* centbins        = centralityBins;\r
 284   Int_t nCentralityBins     = sizeof(centralityBins) / sizeof(Double_t) - 1;\r
 285   \r
 286   // bins for second buffer are shifted by 100 cm\r
 287   Double_t vertexBins[] = {-10., -7., -5., -3., -1., 1., 3., 5., 7., 10.}; // SHOULD BE DEDUCED FROM CREATED ALITHN!!!\r
 288   Double_t* vtxbins     = vertexBins;\r
 289   Int_t nVertexBins     = sizeof(vertexBins) / sizeof(Double_t) - 1;\r
 290   cout<<nCentralityBins<<" "<<nVertexBins<<endl;\r
 291 \r
 292   fPoolMgr = new AliEventPoolManager(poolsize, trackDepth, nCentralityBins, centbins, nVertexBins, vtxbins);\r
 293 \r
 294 \r
 295   // Post output data.\r
 296   PostData(1, fList);\r
 297   PostData(2, fListTriggeredBF);\r
 298   if(fRunShuffling) PostData(3, fListTriggeredBFS);\r
 299   if(fRunMixing) PostData(4, fListTriggeredBFM);\r
 300 }\r
 301 \r
 302 //________________________________________________________________________\r
 303 void AliAnalysisTaskTriggeredBF::UserExec(Option_t *) {\r
 304   // Main loop\r
 305   // Called for each event\r
 306 \r
 307   TString gAnalysisLevel = fBalance->GetAnalysisLevel();\r
 308   Float_t fCentrality = 0.;  \r
 309 \r
 310   // -------------------------------------------------------------                   \r
 311   // AOD analysis (vertex and track cuts also here!!!!)\r
 312   if(gAnalysisLevel == "AOD") {\r
 313     AliVEvent* eventMain = dynamic_cast<AliVEvent*>(InputEvent()); \r
 314     if(!eventMain) {\r
 315       AliError("eventMain not available");\r
 316       return;\r
 317     }\r
 318 \r
 319     // check event cuts and fill event histograms\r
 320     if((fCentrality = IsEventAccepted(eventMain)) < 0){\r
 321       return;\r
 322     }\r
 323     \r
 324     // get the accepted tracks in main event\r
 325     TObjArray *tracksMain = GetAcceptedTracks(eventMain);\r
 326 \r
 327     // store charges of all accepted tracks, shuffle and reassign (two extra loops!)\r
 328     TObjArray* tracksShuffled = NULL;\r
 329     if(fRunShuffling){\r
 330       tracksShuffled = GetShuffledTracks(tracksMain);\r
 331     }\r
 332     \r
 333     // Event mixing --> UPDATE POOL IS MISSING!!!\r
 334     if (fRunMixing)\r
 335       {\r
 336         // 1. First get an event pool corresponding in mult (cent) and\r
 337         //    zvertex to the current event. Once initialized, the pool\r
 338         //    should contain nMix (reduced) events. This routine does not\r
 339         //    pre-scan the chain. The first several events of every chain\r
 340         //    will be skipped until the needed pools are filled to the\r
 341         //    specified depth. If the pool categories are not too rare, this\r
 342         //    should not be a problem. If they are rare, you could lose`\r
 343         //    statistics.\r
 344         \r
 345         // 2. Collect the whole pool's content of tracks into one TObjArray\r
 346         //    (bgTracks), which is effectively a single background super-event.\r
 347         \r
 348         // 3. The reduced and bgTracks arrays must both be passed into\r
 349         //    FillCorrelations(). Also nMix should be passed in, so a weight\r
 350         //    of 1./nMix can be applied.\r
 351         \r
 352         AliEventPool* pool = fPoolMgr->GetEventPool(fCentrality, eventMain->GetPrimaryVertex()->GetZ());\r
 353         \r
 354         if (!pool){\r
 355           AliFatal(Form("No pool found for centrality = %f, zVtx = %f", fCentrality, eventMain->GetPrimaryVertex()->GetZ()));\r
 356         }\r
 357         else{\r
 358 \r
 359         //pool->SetDebug(1);\r
 360         \r
 361           if (pool->IsReady() || pool->NTracksInPool() > fMixingTracks / 10 || pool->GetCurrentNEvents() >= 5){ \r
 362             \r
 363             \r
 364             Int_t nMix = pool->GetCurrentNEvents();\r
 365             //cout << "nMix = " << nMix << " tracks in pool = " << pool->NTracksInPool() << endl;\r
 366             \r
 367             //((TH1F*) fListOfHistos->FindObject("eventStat"))->Fill(2);\r
 368             //((TH2F*) fListOfHistos->FindObject("mixedDist"))->Fill(centrality, pool->NTracksInPool());\r
 369             //if (pool->IsReady())\r
 370             //((TH1F*) fListOfHistos->FindObject("eventStat"))->Fill(3);\r
 371             \r
 372             // Fill mixed-event histos here  \r
 373             for (Int_t jMix=0; jMix<nMix; jMix++) \r
 374               {\r
 375                 TObjArray* tracksMixed = pool->GetEvent(jMix);\r
 376                 fMixedBalance->FillBalance(fCentrality,tracksMain,tracksMixed); \r
 377               }\r
 378           }\r
 379           \r
 380           // Update the Event pool\r
 381           pool->UpdatePool(tracksMain);\r
 382           //pool->PrintInfo();\r
 383           \r
 384         }//pool NULL check  \r
 385       }//run mixing\r
 386     \r
 387     // calculate balance function\r
 388     fBalance->FillBalance(fCentrality,tracksMain,NULL);\r
 389     \r
 390     // calculate shuffled balance function\r
 391     if(fRunShuffling && tracksShuffled != NULL) {\r
 392       fShuffledBalance->FillBalance(fCentrality,tracksShuffled,NULL);\r
 393     }\r
 394     \r
 395   }//AOD analysis\r
 396   else{\r
 397     AliError("Triggered Balance Function analysis only for AODs!");\r
 398   }\r
 399 }     \r
 400 \r
 401 //________________________________________________________________________\r
 402 Float_t AliAnalysisTaskTriggeredBF::IsEventAccepted(AliVEvent *event){\r
 403   // Checks the Event cuts\r
 404   // Fills Event statistics histograms\r
 405   \r
 406   // event selection done in AliAnalysisTaskSE::Exec() --> this is not used\r
 407   fHistEventStats->Fill(1); //all events\r
 408 \r
 409   Bool_t isSelectedMain = kTRUE;\r
 410   Float_t fCentrality = -1.;\r
 411   TString gAnalysisLevel = fBalance->GetAnalysisLevel();\r
 412   \r
 413   if(fUseOfflineTrigger)\r
 414     isSelectedMain = ((AliInputEventHandler*)(AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler()))->IsEventSelected();\r
 415   \r
 416   if(isSelectedMain) {\r
 417     fHistEventStats->Fill(2); //triggered events\r
 418     \r
 419     //Centrality stuff \r
 420     if(fUseCentrality) {\r
 421       if(gAnalysisLevel == "AOD") { //centrality in AOD header\r
 422         AliAODHeader *header = (AliAODHeader*) event->GetHeader();\r
 423         fCentrality = header->GetCentralityP()->GetCentralityPercentile(fCentralityEstimator.Data());\r
 424 \r
 425         // QA for centrality estimators\r
 426         fHistCentStats->Fill(0.,header->GetCentralityP()->GetCentralityPercentile("V0M"));\r
 427         fHistCentStats->Fill(1.,header->GetCentralityP()->GetCentralityPercentile("FMD"));\r
 428         fHistCentStats->Fill(2.,header->GetCentralityP()->GetCentralityPercentile("TRK"));\r
 429         fHistCentStats->Fill(3.,header->GetCentralityP()->GetCentralityPercentile("TKL"));\r
 430         fHistCentStats->Fill(4.,header->GetCentralityP()->GetCentralityPercentile("CL0"));\r
 431         fHistCentStats->Fill(5.,header->GetCentralityP()->GetCentralityPercentile("CL1"));\r
 432         fHistCentStats->Fill(6.,header->GetCentralityP()->GetCentralityPercentile("V0MvsFMD"));\r
 433         fHistCentStats->Fill(7.,header->GetCentralityP()->GetCentralityPercentile("TKLvsV0M"));\r
 434         fHistCentStats->Fill(8.,header->GetCentralityP()->GetCentralityPercentile("ZEMvsZDC"));\r
 435         \r
 436         // centrality QA (V0M)\r
 437         fHistV0M->Fill(event->GetVZEROData()->GetMTotV0A(), event->GetVZEROData()->GetMTotV0C());\r
 438         \r
 439         // centrality QA (reference tracks)\r
 440         fHistRefTracks->Fill(0.,header->GetRefMultiplicity());\r
 441         fHistRefTracks->Fill(1.,header->GetRefMultiplicityPos());\r
 442         fHistRefTracks->Fill(2.,header->GetRefMultiplicityNeg());\r
 443         fHistRefTracks->Fill(3.,header->GetTPConlyRefMultiplicity());\r
 444         fHistRefTracks->Fill(4.,header->GetNumberOfITSClusters(0));\r
 445         fHistRefTracks->Fill(5.,header->GetNumberOfITSClusters(1));\r
 446         fHistRefTracks->Fill(6.,header->GetNumberOfITSClusters(2));\r
 447         fHistRefTracks->Fill(7.,header->GetNumberOfITSClusters(3));\r
 448         fHistRefTracks->Fill(8.,header->GetNumberOfITSClusters(4));\r
 449       }\r
 450     }\r
 451     \r
 452     \r
 453     const AliVVertex *vertex = event->GetPrimaryVertex();\r
 454     \r
 455     if(vertex) {\r
 456       Double32_t fCov[6];\r
 457       vertex->GetCovarianceMatrix(fCov);\r
 458       if(vertex->GetNContributors() > 0) {\r
 459         if(fCov[5] != 0) {\r
 460           fHistEventStats->Fill(3); //events with a proper vertex\r
 461           if(TMath::Abs(vertex->GetX()) < fVxMax) {\r
 462             if(TMath::Abs(vertex->GetY()) < fVyMax) {\r
 463               if(TMath::Abs(vertex->GetZ()) < fVzMax) {\r
 464                 fHistEventStats->Fill(4); //analyzed events\r
 465                 fHistVx->Fill(vertex->GetX());\r
 466                 fHistVy->Fill(vertex->GetY());\r
 467                 fHistVz->Fill(vertex->GetZ());\r
 468 \r
 469                 // take only events inside centrality class\r
 470                 if((fCentrality > fCentralityPercentileMin) && (fCentrality < fCentralityPercentileMax)){\r
 471                   return fCentrality;           \r
 472                 }//centrality class\r
 473               }//Vz cut\r
 474             }//Vy cut\r
 475           }//Vx cut\r
 476         }//proper vertex resolution\r
 477       }//proper number of contributors\r
 478     }//vertex object valid\r
 479   }//triggered event \r
 480   \r
 481   // in all other cases return -1 (event not accepted)\r
 482   return -1;\r
 483 }\r
 484 \r
 485 //________________________________________________________________________\r
 486 TObjArray* AliAnalysisTaskTriggeredBF::GetAcceptedTracks(AliVEvent *event){\r
 487   // Returns TObjArray with tracks after all track cuts (only for AOD!)\r
 488   // Fills QA histograms\r
 489 \r
 490   //output TObjArray holding all good tracks\r
 491   TObjArray* tracksAccepted = new TObjArray;\r
 492   tracksAccepted->SetOwner(kTRUE);\r
 493 \r
 494   Double_t v_charge;\r
 495   Double_t v_eta;\r
 496   Double_t v_phi;\r
 497   Double_t v_pt;\r
 498   \r
 499   // Loop over tracks in event\r
 500   for (Int_t iTracks = 0; iTracks < event->GetNumberOfTracks(); iTracks++) {\r
 501     AliAODTrack* aodTrack = dynamic_cast<AliAODTrack *>(event->GetTrack(iTracks));\r
 502     if (!aodTrack) {\r
 503       AliError(Form("Could not receive track %d", iTracks));\r
 504       continue;\r
 505     }\r
 506     \r
 507     // AOD track cuts\r
 508     \r
 509     // For ESD Filter Information: ANALYSIS/macros/AddTaskESDfilter.C\r
 510     // take only TPC only tracks \r
 511     fHistTrackStats->Fill(aodTrack->GetFilterMap());\r
 512     if(!aodTrack->TestFilterBit(nAODtrackCutBit)) continue;\r
 513     \r
 514     v_charge = aodTrack->Charge();\r
 515     v_eta    = aodTrack->Eta();\r
 516     v_phi    = aodTrack->Phi() * TMath::RadToDeg();\r
 517     v_pt     = aodTrack->Pt();\r
 518     \r
 519     Float_t DCAxy = aodTrack->DCA();      // this is the DCA from global track (not exactly what is cut on)\r
 520     Float_t DCAz  = aodTrack->ZAtDCA();   // this is the DCA from global track (not exactly what is cut on)\r
 521     \r
 522     \r
 523     // Kinematics cuts from ESD track cuts\r
 524     if( v_pt < fPtMin || v_pt > fPtMax)      continue;\r
 525     if( v_eta < fEtaMin || v_eta > fEtaMax)  continue;\r
 526     \r
 527     // Extra DCA cuts (for systematic studies [!= -1])\r
 528     if( fDCAxyCut != -1 && fDCAzCut != -1){\r
 529       if(TMath::Sqrt((DCAxy*DCAxy)/(fDCAxyCut*fDCAxyCut)+(DCAz*DCAz)/(fDCAzCut*fDCAzCut)) > 1 ){\r
 530         continue;  // 2D cut\r
 531       }\r
 532     }\r
 533     \r
 534     // Extra TPC cuts (for systematic studies [!= -1])\r
 535     if( fTPCchi2Cut != -1 && aodTrack->Chi2perNDF() > fTPCchi2Cut){\r
 536       continue;\r
 537     }\r
 538     if( fNClustersTPCCut != -1 && aodTrack->GetTPCNcls() < fNClustersTPCCut){\r
 539       continue;\r
 540     }\r
 541     \r
 542     // fill QA histograms\r
 543     fHistClus->Fill(aodTrack->GetITSNcls(),aodTrack->GetTPCNcls());\r
 544     fHistDCA->Fill(DCAz,DCAxy);\r
 545     fHistChi2->Fill(aodTrack->Chi2perNDF());\r
 546     fHistPt->Fill(v_pt);\r
 547     fHistEta->Fill(v_eta);\r
 548     fHistPhi->Fill(v_phi);\r
 549     \r
 550     // add the track to the TObjArray\r
 551     tracksAccepted->Add(new AliBFBasicParticle(v_eta, v_phi, v_pt, v_charge));\r
 552   }\r
 553 \r
 554   return tracksAccepted;\r
 555 }\r
 556 \r
 557 //________________________________________________________________________\r
 558 TObjArray* AliAnalysisTaskTriggeredBF::GetShuffledTracks(TObjArray *tracks){\r
 559   // Clones TObjArray and returns it with tracks after shuffling the charges\r
 560 \r
 561   TObjArray* tracksShuffled = new TObjArray;\r
 562   tracksShuffled->SetOwner(kTRUE);\r
 563 \r
 564   vector<Short_t> *chargeVector = new vector<Short_t>;   //original charge of accepted tracks \r
 565 \r
 566   for (Int_t i=0; i<tracks->GetEntriesFast(); i++)\r
 567   {\r
 568     AliVParticle* track = (AliVParticle*) tracks->At(i);\r
 569     chargeVector->push_back(track->Charge());\r
 570   }  \r
 571  \r
 572   random_shuffle(chargeVector->begin(), chargeVector->end());\r
 573   \r
 574   for(Int_t i = 0; i < tracks->GetEntriesFast(); i++){\r
 575     AliVParticle* track = (AliVParticle*) tracks->At(i);\r
 576     tracksShuffled->Add(new AliBFBasicParticle(track->Eta(), track->Phi(), track->Pt(),chargeVector->at(i)));\r
 577   }\r
 578 \r
 579   delete chargeVector;\r
 580    \r
 581   return tracksShuffled;\r
 582 }\r
 583 \r
 584 //________________________________________________________________________\r
 585 void  AliAnalysisTaskTriggeredBF::FinishTaskOutput(){\r
 586 \r
 587   if (!fBalance) {\r
 588     AliError("fBalance not available");\r
 589     return;\r
 590   }  \r
 591   if(fRunShuffling) {\r
 592     if (!fShuffledBalance) {\r
 593       AliError("fShuffledBalance not available");\r
 594       return;\r
 595     }\r
 596   }\r
 597 \r
 598 }\r
 599 \r
 600 //________________________________________________________________________\r
 601 void AliAnalysisTaskTriggeredBF::Terminate(Option_t *) {\r
 602   // Called once at the end of the query\r
 603 \r
 604   // not implemented ...\r
 605 \r
 606 }\r
 607 \r
 608 void AliAnalysisTaskTriggeredBF::UserExecMix(Option_t *)\r
 609 {\r
 610 \r
 611   // not yet done for event mixing!\r
 612   return;\r
 613 \r
 614 }\r
 615 \r