]> git.uio.no Git - u/mrichter/AliRoot.git/blobdiff - PWGCF/EBYE/BalanceFunctions/AliAnalysisTaskBFPsi.cxx
moving from AliGenHijingEventHeader to AliCollisionGeometry also for Event plane...
[u/mrichter/AliRoot.git] / PWGCF / EBYE / BalanceFunctions / AliAnalysisTaskBFPsi.cxx
index a9ce459dc7b68a3ecf7023feedd74e5d8dce0094..5255a44f73ce3da5fc0c7fa065d505bb87a8c976 100755 (executable)
 #include "AliAODEvent.h"\r
 #include "AliAODTrack.h"\r
 #include "AliAODInputHandler.h"\r
+#include "AliCollisionGeometry.h"\r
 #include "AliGenEventHeader.h"\r
-#include "AliGenHijingEventHeader.h"\r
 #include "AliMCEventHandler.h"\r
 #include "AliMCEvent.h"\r
 #include "AliStack.h"\r
 #include "AliESDtrackCuts.h"\r
 #include "AliEventplane.h"\r
-#include "AliTHn.h"              \r
+#include "AliTHn.h"    \r
+\r
+#include "AliEventPoolManager.h"           \r
 \r
 #include "AliPID.h"                \r
 #include "AliPIDResponse.h"        \r
 \r
 #include "AliAnalysisTaskBFPsi.h"\r
 #include "AliBalancePsi.h"\r
+#include "AliAnalysisTaskTriggeredBF.h"\r
 \r
 \r
 // Analysis task for the BF vs Psi code\r
 // Authors: Panos.Christakoglou@nikhef.nl\r
 \r
+using std::cout;\r
+using std::endl;\r
+\r
 ClassImp(AliAnalysisTaskBFPsi)\r
 \r
 //________________________________________________________________________\r
@@ -48,9 +54,15 @@ AliAnalysisTaskBFPsi::AliAnalysisTaskBFPsi(const char *name)
   fBalance(0),\r
   fRunShuffling(kFALSE),\r
   fShuffledBalance(0),\r
+  fRunMixing(kFALSE),\r
+  fRunMixingEventPlane(kFALSE),\r
+  fMixingTracks(50000),\r
+  fMixedBalance(0),\r
+  fPoolMgr(0),\r
   fList(0),\r
   fListBF(0),\r
   fListBFS(0),\r
+  fListBFM(0),\r
   fHistListPIDQA(0),\r
   fHistEventStats(0),\r
   fHistCentStats(0),\r
@@ -114,8 +126,19 @@ AliAnalysisTaskBFPsi::AliAnalysisTaskBFPsi(const char *name)
   nAODtrackCutBit(128),\r
   fPtMin(0.3),\r
   fPtMax(1.5),\r
+  fPtMinForCorrections(0.3),//=================================correction\r
+  fPtMaxForCorrections(1.5),//=================================correction\r
+  fPtBinForCorrections(36), //=================================correction\r
   fEtaMin(-0.8),\r
   fEtaMax(-0.8),\r
+  fEtaMinForCorrections(-0.8),//=================================correction\r
+  fEtaMaxForCorrections(0.8),//=================================correction\r
+  fEtaBinForCorrections(16), //=================================correction\r
+  fPhiMin(0.),\r
+  fPhiMax(360.),\r
+  fPhiMinForCorrections(0.),//=================================correction\r
+  fPhiMaxForCorrections(360.),//=================================correction\r
+  fPhiBinForCorrections(100), //=================================correction\r
   fDCAxyCut(-1),\r
   fDCAzCut(-1),\r
   fTPCchi2Cut(-1),\r
@@ -125,16 +148,27 @@ AliAnalysisTaskBFPsi::AliAnalysisTaskBFPsi(const char *name)
   fUseFlowAfterBurner(kFALSE),\r
   fExcludeResonancesInMC(kFALSE),\r
   fUseMCPdgCode(kFALSE),\r
-  fPDGCodeToBeAnalyzed(-1) {\r
+  fPDGCodeToBeAnalyzed(-1),\r
+  fEventClass("EventPlane") \r
+{\r
   // Constructor\r
   // Define input and output slots here\r
   // Input slot #0 works with a TChain\r
+\r
+  //======================================================correction\r
+  for (Int_t i=0; i<=kCENTRALITY; i++){\r
+    fHistMatrixCorrectionPlus[i] = NULL; \r
+    fHistMatrixCorrectionMinus[i] = NULL; \r
+  }\r
+  //=====================================================correction\r
+\r
   DefineInput(0, TChain::Class());\r
   // Output slot #0 writes into a TH1 container\r
   DefineOutput(1, TList::Class());\r
   DefineOutput(2, TList::Class());\r
   DefineOutput(3, TList::Class());\r
   DefineOutput(4, TList::Class());\r
+  DefineOutput(5, TList::Class());\r
 }\r
 \r
 //________________________________________________________________________\r
@@ -165,9 +199,16 @@ AliAnalysisTaskBFPsi::~AliAnalysisTaskBFPsi() {
 void AliAnalysisTaskBFPsi::UserCreateOutputObjects() {\r
   // Create histograms\r
   // Called once\r
+\r
+  // global switch disabling the reference \r
+  // (to avoid "Replacing existing TH1" if several wagons are created in train)\r
+  Bool_t oldStatus = TH1::AddDirectoryStatus();\r
+  TH1::AddDirectory(kFALSE);\r
+\r
   if(!fBalance) {\r
     fBalance = new AliBalancePsi();\r
     fBalance->SetAnalysisLevel("ESD");\r
+    fBalance->SetEventClass(fEventClass);\r
     //fBalance->SetNumberOfBins(-1,16);\r
     //fBalance->SetInterval(-1,-0.8,0.8,16,0.,1.6,15.);\r
   }\r
@@ -175,10 +216,18 @@ void AliAnalysisTaskBFPsi::UserCreateOutputObjects() {
     if(!fShuffledBalance) {\r
       fShuffledBalance = new AliBalancePsi();\r
       fShuffledBalance->SetAnalysisLevel("ESD");\r
+      fShuffledBalance->SetEventClass(fEventClass);\r
       //fShuffledBalance->SetNumberOfBins(-1,16);\r
       //fShuffledBalance->SetInterval(-1,-0.8,0.8,16,0.,1.6,15.);\r
     }\r
   }\r
+  if(fRunMixing) {\r
+    if(!fMixedBalance) {\r
+      fMixedBalance = new AliBalancePsi();\r
+      fMixedBalance->SetAnalysisLevel("ESD");\r
+      fMixedBalance->SetEventClass(fEventClass);\r
+    }\r
+  }\r
 \r
   //QA list\r
   fList = new TList();\r
@@ -196,6 +245,12 @@ void AliAnalysisTaskBFPsi::UserCreateOutputObjects() {
     fListBFS->SetOwner();\r
   }\r
 \r
+  if(fRunMixing) {\r
+    fListBFM = new TList();\r
+    fListBFM->SetName("listTriggeredBFMixed");\r
+    fListBFM->SetOwner();\r
+  }\r
+\r
   //PID QA list\r
   if(fUsePID) {\r
     fHistListPIDQA = new TList();\r
@@ -204,12 +259,12 @@ void AliAnalysisTaskBFPsi::UserCreateOutputObjects() {
   }\r
 \r
   //Event stats.\r
-  TString gCutName[4] = {"Total","Offline trigger",\r
-                         "Vertex","Analyzed"};\r
+  TString gCutName[5] = {"Total","Offline trigger",\r
+                         "Vertex","Analyzed","sel. Centrality"};\r
   fHistEventStats = new TH2F("fHistEventStats",\r
                              "Event statistics;;Centrality percentile;N_{events}",\r
-                             4,0.5,4.5,220,-5,105);\r
-  for(Int_t i = 1; i <= 4; i++)\r
+                             5,0.5,5.5,220,-5,105);\r
+  for(Int_t i = 1; i <= 5; i++)\r
     fHistEventStats->GetXaxis()->SetBinLabel(i,gCutName[i-1].Data());\r
   fList->Add(fHistEventStats);\r
 \r
@@ -221,10 +276,10 @@ void AliAnalysisTaskBFPsi::UserCreateOutputObjects() {
     fHistCentStats->GetXaxis()->SetBinLabel(i,gCentName[i-1].Data());\r
   fList->Add(fHistCentStats);\r
 \r
-  fHistTriggerStats = new TH1F("fHistTriggerStats","Trigger statistics;TriggerBit;N_{events}",130,0,130);\r
+  fHistTriggerStats = new TH1F("fHistTriggerStats","Trigger statistics;TriggerBit;N_{events}",1025,0,1025);\r
   fList->Add(fHistTriggerStats);\r
 \r
-  fHistTrackStats = new TH1F("fHistTrackStats","Event statistics;TrackFilterBit;N_{events}",130,0,130);\r
+  fHistTrackStats = new TH1F("fHistTrackStats","Event statistics;TrackFilterBit;N_{events}",16,0,16);\r
   fList->Add(fHistTrackStats);\r
 \r
   fHistNumberOfAcceptedTracks = new TH2F("fHistNumberOfAcceptedTracks",";N_{acc.};Centrality percentile;Entries",4001,-0.5,4000.5,220,-5,105);\r
@@ -255,15 +310,15 @@ void AliAnalysisTaskBFPsi::UserCreateOutputObjects() {
   fList->Add(fHistEta);\r
   fHistRapidity  = new TH2F("fHistRapidity","y distribution;y;Centrality percentile",200,-2,2,220,-5,105);\r
   fList->Add(fHistRapidity);\r
-  fHistPhi  = new TH2F("fHistPhi","#phi distribution;#phi;Centrality percentile",200,-20,380,220,-5,105);\r
+  fHistPhi  = new TH2F("fHistPhi","#phi distribution;#phi (rad);Centrality percentile",200,0.0,2.*TMath::Pi(),220,-5,105);\r
   fList->Add(fHistPhi);\r
   fHistPhiBefore  = new TH2F("fHistPhiBefore","#phi distribution;#phi;Centrality percentile",200,0.,2*TMath::Pi(),220,-5,105);\r
   fList->Add(fHistPhiBefore);\r
   fHistPhiAfter  = new TH2F("fHistPhiAfter","#phi distribution;#phi;Centrality percentile",200,0.,2*TMath::Pi(),220,-5,105);\r
   fList->Add(fHistPhiAfter);\r
-  fHistPhiPos  = new TH2F("fHistPhiPos","#phi distribution for positive particles;#phi;Centrality percentile",200,-20,380,220,-5,105);\r
+  fHistPhiPos  = new TH2F("fHistPhiPos","#phi distribution for positive particles;#phi;Centrality percentile",200,0.,2*TMath::Pi(),220,-5,105);\r
   fList->Add(fHistPhiPos);\r
-  fHistPhiNeg  = new TH2F("fHistPhiNeg","#phi distribution for negative particles;#phi;Centrality percentile",200,-20,380,220,-5,105);\r
+  fHistPhiNeg  = new TH2F("fHistPhiNeg","#phi distribution for negative particles;#phi;Centrality percentile",200,0.,2.*TMath::Pi(),220,-5,105);\r
   fList->Add(fHistPhiNeg);\r
   fHistV0M  = new TH2F("fHistV0M","V0 Multiplicity C vs. A",500, 0, 20000, 500, 0, 20000);\r
   fList->Add(fHistV0M);\r
@@ -273,6 +328,13 @@ void AliAnalysisTaskBFPsi::UserCreateOutputObjects() {
     fHistRefTracks->GetXaxis()->SetBinLabel(i,gRefTrackName[i-1].Data());\r
   fList->Add(fHistRefTracks);\r
 \r
+  // QA histograms for HBTinspired and Conversion cuts\r
+  fList->Add(fBalance->GetQAHistHBTbefore());\r
+  fList->Add(fBalance->GetQAHistHBTafter());\r
+  fList->Add(fBalance->GetQAHistConversionbefore());\r
+  fList->Add(fBalance->GetQAHistConversionafter());\r
+  fList->Add(fBalance->GetQAHistPsiMinusPhi());\r
+\r
   // Balance function histograms\r
   // Initialize histograms if not done yet\r
   if(!fBalance->GetHistNp()){\r
@@ -305,8 +367,47 @@ void AliAnalysisTaskBFPsi::UserCreateOutputObjects() {
     fListBFS->Add(fShuffledBalance->GetHistNpp());\r
     fListBFS->Add(fShuffledBalance->GetHistNnp());\r
   }  \r
+\r
+  if(fRunMixing) {\r
+    fListBFM->Add(fMixedBalance->GetHistNp());\r
+    fListBFM->Add(fMixedBalance->GetHistNn());\r
+    fListBFM->Add(fMixedBalance->GetHistNpn());\r
+    fListBFM->Add(fMixedBalance->GetHistNnn());\r
+    fListBFM->Add(fMixedBalance->GetHistNpp());\r
+    fListBFM->Add(fMixedBalance->GetHistNnp());\r
+  }\r
   //}\r
 \r
+\r
+  // Event Mixing\r
+  if(fRunMixing){\r
+    Int_t trackDepth = fMixingTracks; \r
+    Int_t poolsize   = 1000;  // Maximum number of events, ignored in the present implemented of AliEventPoolManager\r
+    \r
+    // centrality bins\r
+    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
+    Double_t* centbins        = centralityBins;\r
+    Int_t nCentralityBins     = sizeof(centralityBins) / sizeof(Double_t) - 1;\r
+    \r
+    // Zvtx bins\r
+    Double_t vertexBins[] = {-10., -7., -5., -3., -1., 1., 3., 5., 7., 10.}; // SHOULD BE DEDUCED FROM CREATED ALITHN!!!\r
+    Double_t* vtxbins     = vertexBins;\r
+    Int_t nVertexBins     = sizeof(vertexBins) / sizeof(Double_t) - 1;\r
+    \r
+    // Event plane angle (Psi) bins\r
+    Double_t psiBins[] = {0.,45.,135.,215.,305.,360.}; // SHOULD BE DEDUCED FROM CREATED ALITHN!!!\r
+    Double_t* psibins     = psiBins;\r
+    Int_t nPsiBins     = sizeof(psiBins) / sizeof(Double_t) - 1;\r
+    \r
+    // run the event mixing also in bins of event plane (statistics!)\r
+    if(fRunMixingEventPlane){\r
+      fPoolMgr = new AliEventPoolManager(poolsize, trackDepth, nCentralityBins, centbins, nVertexBins, vtxbins, nPsiBins, psibins);\r
+    }\r
+    else{\r
+      fPoolMgr = new AliEventPoolManager(poolsize, trackDepth, nCentralityBins, centbins, nVertexBins, vtxbins);\r
+    }\r
+  }\r
+\r
   if(fESDtrackCuts) fList->Add(fESDtrackCuts);\r
 \r
   //====================PID========================//\r
@@ -362,279 +463,342 @@ void AliAnalysisTaskBFPsi::UserCreateOutputObjects() {
   PostData(1, fList);\r
   PostData(2, fListBF);\r
   if(fRunShuffling) PostData(3, fListBFS);\r
-  if(fUsePID) PostData(4, fHistListPIDQA);       //PID\r
+  if(fRunMixing) PostData(4, fListBFM);\r
+  if(fUsePID) PostData(5, fHistListPIDQA);       //PID\r
+\r
+  TH1::AddDirectory(oldStatus);\r
+}\r
+\r
+\r
+//________________________________________________________________________\r
+void AliAnalysisTaskBFPsi::SetInputCorrection(const char* filename, \r
+                                             const char* gCollSystem) {\r
+  //Open files that will be used for correction\r
+  TString gCollidingSystem = gCollSystem;\r
+\r
+  //Open the input file\r
+  TFile *f = TFile::Open(filename);\r
+  if(!f->IsOpen()) {\r
+    Printf("File not found!!!");\r
+    return;\r
+  }\r
+  \r
+  //Get the TDirectoryFile and TList\r
+  TDirectoryFile *dir = dynamic_cast<TDirectoryFile *>(f->Get("PWGCFEbyE.outputBalanceFunctionEfficiencyAnalysis"));\r
+  if(!dir) {\r
+    Printf("TDirectoryFile not found!!!");\r
+    return;\r
+  }\r
+  \r
+  TString listEffName = "";\r
+  for (Int_t iCent = 0; iCent < kCENTRALITY; iCent++) {\r
+    listEffName = "listEfficiencyBF_";  \r
+    listEffName += (TString)((Int_t)(centralityArrayForPbPb[iCent]));\r
+    listEffName += "_";\r
+    listEffName += (TString)((Int_t)(centralityArrayForPbPb[iCent+1]));\r
+    TList *list = (TList*)dir->Get(listEffName.Data());\r
+    if(!list) {\r
+      Printf("TList Efficiency not found!!!");\r
+      return;\r
+    }\r
+    \r
+    TString histoName = "fHistMatrixCorrectionPlus";\r
+    fHistMatrixCorrectionPlus[iCent]= dynamic_cast<TH3D *>(list->FindObject(histoName.Data()));\r
+    if(!fHistMatrixCorrectionPlus[iCent]) {\r
+      Printf("fHist not found!!!");\r
+      return;\r
+    }\r
+    \r
+    histoName = "fHistMatrixCorrectionMinus";\r
+    fHistMatrixCorrectionMinus[iCent] = dynamic_cast<TH3D *>(list->FindObject(histoName.Data()));  \r
+    if(!fHistMatrixCorrectionMinus[iCent]) {\r
+      Printf("fHist not found!!!");\r
+      return; \r
+    }\r
+  }//loop over centralities: ONLY the PbPb case is covered\r
+\r
+  if(fHistMatrixCorrectionPlus[0]){\r
+    fEtaMinForCorrections = fHistMatrixCorrectionPlus[0]->GetXaxis()->GetXmin();\r
+    fEtaMaxForCorrections = fHistMatrixCorrectionPlus[0]->GetXaxis()->GetXmax();\r
+    fEtaBinForCorrections = fHistMatrixCorrectionPlus[0]->GetNbinsX();\r
+    \r
+    fPtMinForCorrections = fHistMatrixCorrectionPlus[0]->GetYaxis()->GetXmin();\r
+    fPtMaxForCorrections = fHistMatrixCorrectionPlus[0]->GetYaxis()->GetXmax();\r
+    fPtBinForCorrections = fHistMatrixCorrectionPlus[0]->GetNbinsY();\r
+    \r
+    fPhiMinForCorrections = fHistMatrixCorrectionPlus[0]->GetZaxis()->GetXmin();\r
+    fPhiMaxForCorrections = fHistMatrixCorrectionPlus[0]->GetZaxis()->GetXmax();\r
+    fPhiBinForCorrections = fHistMatrixCorrectionPlus[0]->GetNbinsZ();\r
+  }\r
 }\r
 \r
 //________________________________________________________________________\r
 void AliAnalysisTaskBFPsi::UserExec(Option_t *) {\r
   // Main loop\r
   // Called for each event\r
-  TString gAnalysisLevel = fBalance->GetAnalysisLevel();\r
-\r
-  AliESDtrack *track_TPC   = NULL;\r
 \r
+  TString gAnalysisLevel = fBalance->GetAnalysisLevel();\r
   Int_t gNumberOfAcceptedTracks = 0;\r
-  Float_t fCentrality           = 0.;\r
-  Double_t gReactionPlane       = 0.;\r
-\r
-  // vector holding the charges/kinematics of all tracks (charge,y,eta,phi,p0,p1,p2,pt,E)\r
-  vector<Double_t> *chargeVectorShuffle[9];   // this will be shuffled\r
-  vector<Double_t> *chargeVector[9];          // original charge\r
-  for(Int_t i = 0; i < 9; i++){\r
-    chargeVectorShuffle[i] = new vector<Double_t>;\r
-    chargeVector[i]        = new vector<Double_t>;\r
+  Double_t gCentrality          = -1.;\r
+  Double_t gReactionPlane       = -1.; \r
+  Float_t bSign = 0.;\r
+  \r
+  // get the event (for generator level: MCEvent())\r
+  AliVEvent* eventMain = NULL;\r
+  if(gAnalysisLevel == "MC") {\r
+    eventMain = dynamic_cast<AliVEvent*>(MCEvent()); \r
   }\r
-\r
-  Double_t v_charge;\r
-  Double_t v_y;\r
-  Double_t v_eta;\r
-  Double_t v_phi;\r
-  Double_t v_p[3];\r
-  Double_t v_pt;\r
-  Double_t v_E;\r
-\r
+  else{\r
+    eventMain = dynamic_cast<AliVEvent*>(InputEvent()); \r
+    \r
+    // for HBT like cuts need magnetic field sign\r
+    bSign = (eventMain->GetMagneticField() > 0) ? 1 : -1;\r
+  }\r
+  if(!eventMain) {\r
+    AliError("eventMain not available");\r
+    return;\r
+  }\r
+  \r
+  // PID Response task active?\r
   if(fUsePID) {\r
     fPIDResponse = ((AliInputEventHandler*)(AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler()))->GetPIDResponse();\r
     if (!fPIDResponse) AliFatal("This Task needs the PID response attached to the inputHandler");\r
   }\r
\r
-  //ESD analysis\r
-  if(gAnalysisLevel == "ESD") {\r
-    AliESDEvent* gESD = dynamic_cast<AliESDEvent*>(InputEvent()); // from TaskSE\r
-    if (!gESD) {\r
-      Printf("ERROR: gESD not available");\r
-      return;\r
-    }\r
+  \r
+  // check event cuts and fill event histograms\r
+  if((gCentrality = IsEventAccepted(eventMain)) < 0){\r
+    return;\r
+  }\r
+  \r
+  //Compute Multiplicity or Centrality variable\r
+  Double_t lMultiplicityVar = GetRefMultiOrCentrality( eventMain );\r
 \r
-    // store offline trigger bits\r
-    fHistTriggerStats->Fill(((AliInputEventHandler*)(AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler()))->IsEventSelected());\r
+  // get the reaction plane\r
+  gReactionPlane = GetEventPlane(eventMain);\r
+  fHistEventPlane->Fill(gReactionPlane,gCentrality);\r
+  if(gReactionPlane < 0){\r
+    return;\r
+  }\r
+  \r
+  // get the accepted tracks in main event\r
+  TObjArray *tracksMain = GetAcceptedTracks(eventMain,gCentrality,gReactionPlane);\r
+  gNumberOfAcceptedTracks = tracksMain->GetEntriesFast();\r
 \r
-    // event selection done in AliAnalysisTaskSE::Exec() --> this is not used\r
-    fHistEventStats->Fill(1,fCentrality); //all events\r
-    Bool_t isSelected = kTRUE;\r
-    if(fUseOfflineTrigger)\r
-      isSelected = ((AliInputEventHandler*)(AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler()))->IsEventSelected();\r
-    if(isSelected) {\r
-      fHistEventStats->Fill(2,fCentrality); //triggered events\r
+  //multiplicity cut (used in pp)\r
+  fHistNumberOfAcceptedTracks->Fill(gNumberOfAcceptedTracks,gCentrality);\r
+  if(fUseMultiplicity) {\r
+    if((gNumberOfAcceptedTracks < fNumberOfAcceptedTracksMin)||(gNumberOfAcceptedTracks > fNumberOfAcceptedTracksMax))\r
+      return;\r
+  }\r
 \r
-      if(fUseCentrality) {\r
-       //Centrality stuff\r
-       AliCentrality *centrality = gESD->GetCentrality();\r
+  // store charges of all accepted tracks, shuffle and reassign (two extra loops!)\r
+  TObjArray* tracksShuffled = NULL;\r
+  if(fRunShuffling){\r
+    tracksShuffled = GetShuffledTracks(tracksMain,gCentrality);\r
+  }\r
+  \r
+  // Event mixing \r
+  if (fRunMixing)\r
+    {\r
+      // 1. First get an event pool corresponding in mult (cent) and\r
+      //    zvertex to the current event. Once initialized, the pool\r
+      //    should contain nMix (reduced) events. This routine does not\r
+      //    pre-scan the chain. The first several events of every chain\r
+      //    will be skipped until the needed pools are filled to the\r
+      //    specified depth. If the pool categories are not too rare, this\r
+      //    should not be a problem. If they are rare, you could lose`\r
+      //    statistics.\r
+      \r
+      // 2. Collect the whole pool's content of tracks into one TObjArray\r
+      //    (bgTracks), which is effectively a single background super-event.\r
+      \r
+      // 3. The reduced and bgTracks arrays must both be passed into\r
+      //    FillCorrelations(). Also nMix should be passed in, so a weight\r
+      //    of 1./nMix can be applied.\r
+      \r
+      AliEventPool* pool = fPoolMgr->GetEventPool(gCentrality, eventMain->GetPrimaryVertex()->GetZ(),gReactionPlane);\r
+      \r
+      if (!pool){\r
+       AliFatal(Form("No pool found for centrality = %f, zVtx = %f, psi = %f", gCentrality, eventMain->GetPrimaryVertex()->GetZ(),gReactionPlane));\r
+      }\r
+      else{\r
        \r
-       fCentrality = centrality->GetCentralityPercentile(fCentralityEstimator.Data());\r
+       //pool->SetDebug(1);\r
+\r
+       if (pool->IsReady() || pool->NTracksInPool() > fMixingTracks / 10 || pool->GetCurrentNEvents() >= 5){ \r
+         \r
+         \r
+         Int_t nMix = pool->GetCurrentNEvents();\r
+         //cout << "nMix = " << nMix << " tracks in pool = " << pool->NTracksInPool() << endl;\r
+         \r
+         //((TH1F*) fListOfHistos->FindObject("eventStat"))->Fill(2);\r
+         //((TH2F*) fListOfHistos->FindObject("mixedDist"))->Fill(centrality, pool->NTracksInPool());\r
+         //if (pool->IsReady())\r
+         //((TH1F*) fListOfHistos->FindObject("eventStat"))->Fill(3);\r
+         \r
+         // Fill mixed-event histos here  \r
+         for (Int_t jMix=0; jMix<nMix; jMix++) \r
+           {\r
+             TObjArray* tracksMixed = pool->GetEvent(jMix);\r
+             fMixedBalance->CalculateBalance(gReactionPlane,tracksMain,tracksMixed,bSign,lMultiplicityVar);\r
+           }\r
+       }\r
        \r
-       // take only events inside centrality class\r
-       if(!centrality->IsEventInCentralityClass(fCentralityPercentileMin,\r
-                                                fCentralityPercentileMax,\r
-                                                fCentralityEstimator.Data()))\r
-         return;\r
+       // Update the Event pool\r
+       pool->UpdatePool(tracksMain);\r
+       //pool->PrintInfo();\r
        \r
+      }//pool NULL check  \r
+    }//run mixing\r
+  \r
+  // calculate balance function\r
+  fBalance->CalculateBalance(gReactionPlane,tracksMain,NULL,bSign,lMultiplicityVar);\r
+  \r
+  // calculate shuffled balance function\r
+  if(fRunShuffling && tracksShuffled != NULL) {\r
+    fShuffledBalance->CalculateBalance(gReactionPlane,tracksShuffled,NULL,bSign,lMultiplicityVar);\r
+  }\r
+}      \r
+\r
+//________________________________________________________________________\r
+Double_t AliAnalysisTaskBFPsi::IsEventAccepted(AliVEvent *event){\r
+  // Checks the Event cuts\r
+  // Fills Event statistics histograms\r
+  \r
+  Bool_t isSelectedMain = kTRUE;\r
+  Float_t gCentrality = -1.;\r
+  TString gAnalysisLevel = fBalance->GetAnalysisLevel();\r
+\r
+  fHistEventStats->Fill(1,gCentrality); //all events\r
+\r
+  // Event trigger bits\r
+  fHistTriggerStats->Fill(((AliInputEventHandler*)(AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler()))->IsEventSelected());\r
+  if(fUseOfflineTrigger)\r
+    isSelectedMain = ((AliInputEventHandler*)(AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler()))->IsEventSelected();\r
+  \r
+  if(isSelectedMain) {\r
+    fHistEventStats->Fill(2,gCentrality); //triggered events\r
+    \r
+    //Centrality stuff \r
+    if(fUseCentrality) {\r
+      if(gAnalysisLevel == "AOD") { //centrality in AOD header\r
+       AliAODHeader *header = (AliAODHeader*) event->GetHeader();\r
+       if(header){\r
+         gCentrality = header->GetCentralityP()->GetCentralityPercentile(fCentralityEstimator.Data());\r
+         \r
+         // QA for centrality estimators\r
+         fHistCentStats->Fill(0.,header->GetCentralityP()->GetCentralityPercentile("V0M"));\r
+         fHistCentStats->Fill(1.,header->GetCentralityP()->GetCentralityPercentile("FMD"));\r
+         fHistCentStats->Fill(2.,header->GetCentralityP()->GetCentralityPercentile("TRK"));\r
+         fHistCentStats->Fill(3.,header->GetCentralityP()->GetCentralityPercentile("TKL"));\r
+         fHistCentStats->Fill(4.,header->GetCentralityP()->GetCentralityPercentile("CL0"));\r
+         fHistCentStats->Fill(5.,header->GetCentralityP()->GetCentralityPercentile("CL1"));\r
+         fHistCentStats->Fill(6.,header->GetCentralityP()->GetCentralityPercentile("V0MvsFMD"));\r
+         fHistCentStats->Fill(7.,header->GetCentralityP()->GetCentralityPercentile("TKLvsV0M"));\r
+         fHistCentStats->Fill(8.,header->GetCentralityP()->GetCentralityPercentile("ZEMvsZDC"));\r
+         \r
+         // centrality QA (V0M)\r
+         fHistV0M->Fill(event->GetVZEROData()->GetMTotV0A(), event->GetVZEROData()->GetMTotV0C());\r
+         \r
+         // centrality QA (reference tracks)\r
+         fHistRefTracks->Fill(0.,header->GetRefMultiplicity());\r
+         fHistRefTracks->Fill(1.,header->GetRefMultiplicityPos());\r
+         fHistRefTracks->Fill(2.,header->GetRefMultiplicityNeg());\r
+         fHistRefTracks->Fill(3.,header->GetTPConlyRefMultiplicity());\r
+         fHistRefTracks->Fill(4.,header->GetNumberOfITSClusters(0));\r
+         fHistRefTracks->Fill(5.,header->GetNumberOfITSClusters(1));\r
+         fHistRefTracks->Fill(6.,header->GetNumberOfITSClusters(2));\r
+         fHistRefTracks->Fill(7.,header->GetNumberOfITSClusters(3));\r
+         fHistRefTracks->Fill(8.,header->GetNumberOfITSClusters(4));\r
+       }//AOD header\r
+      }//AOD\r
+\r
+      else if(gAnalysisLevel == "ESD" || gAnalysisLevel == "MCESD"){ // centrality class for ESDs or MC-ESDs\r
+       AliCentrality *centrality = event->GetCentrality();\r
+       gCentrality = centrality->GetCentralityPercentile(fCentralityEstimator.Data());\r
+\r
+       // QA for centrality estimators\r
+       fHistCentStats->Fill(0.,centrality->GetCentralityPercentile("V0M"));\r
+       fHistCentStats->Fill(1.,centrality->GetCentralityPercentile("FMD"));\r
+       fHistCentStats->Fill(2.,centrality->GetCentralityPercentile("TRK"));\r
+       fHistCentStats->Fill(3.,centrality->GetCentralityPercentile("TKL"));\r
+       fHistCentStats->Fill(4.,centrality->GetCentralityPercentile("CL0"));\r
+       fHistCentStats->Fill(5.,centrality->GetCentralityPercentile("CL1"));\r
+       fHistCentStats->Fill(6.,centrality->GetCentralityPercentile("V0MvsFMD"));\r
+       fHistCentStats->Fill(7.,centrality->GetCentralityPercentile("TKLvsV0M"));\r
+       fHistCentStats->Fill(8.,centrality->GetCentralityPercentile("ZEMvsZDC"));\r
+\r
        // centrality QA (V0M)\r
-       fHistV0M->Fill(gESD->GetVZEROData()->GetMTotV0A(), gESD->GetVZEROData()->GetMTotV0C());\r
+       fHistV0M->Fill(event->GetVZEROData()->GetMTotV0A(), event->GetVZEROData()->GetMTotV0C());\r
+      }//ESD\r
+      else if(gAnalysisLevel == "MC"){\r
+       Double_t gImpactParameter = 0.;\r
+       if(dynamic_cast<AliMCEvent*>(event)){\r
+         AliCollisionGeometry* headerH = dynamic_cast<AliCollisionGeometry*>(dynamic_cast<AliMCEvent*>(event)->GenEventHeader());\r
+         if(headerH){\r
+           gImpactParameter = headerH->ImpactParameter();\r
+           gCentrality      = gImpactParameter;\r
+         }//MC header\r
+       }//MC event cast\r
+      }//MC\r
+      else{\r
+       gCentrality = -1.;\r
       }\r
-       \r
-      const AliESDVertex *vertex = gESD->GetPrimaryVertex();\r
+    }\r
+    \r
+    // Event Vertex MC\r
+    if(gAnalysisLevel == "MC"){\r
+      AliGenEventHeader *header = dynamic_cast<AliMCEvent*>(event)->GenEventHeader();\r
+      if(header){  \r
+       TArrayF gVertexArray;\r
+       header->PrimaryVertex(gVertexArray);\r
+       //Printf("Vertex: %lf (x) - %lf (y) - %lf (z)",\r
+       //gVertexArray.At(0),\r
+       //gVertexArray.At(1),\r
+       //gVertexArray.At(2));\r
+       fHistEventStats->Fill(3,gCentrality); //events with a proper vertex\r
+       if(TMath::Abs(gVertexArray.At(0)) < fVxMax) {\r
+         if(TMath::Abs(gVertexArray.At(1)) < fVyMax) {\r
+           if(TMath::Abs(gVertexArray.At(2)) < fVzMax) {\r
+             fHistEventStats->Fill(4,gCentrality); //analayzed events\r
+             fHistVx->Fill(gVertexArray.At(0));\r
+             fHistVy->Fill(gVertexArray.At(1));\r
+             fHistVz->Fill(gVertexArray.At(2),gCentrality);\r
+             \r
+             // take only events inside centrality class\r
+             if((fImpactParameterMin < gCentrality) && (fImpactParameterMax > gCentrality)){\r
+               fHistEventStats->Fill(5,gCentrality); //events with correct centrality\r
+               return gCentrality;         \r
+             }//centrality class\r
+           }//Vz cut\r
+         }//Vy cut\r
+       }//Vx cut\r
+      }//header    \r
+    }//MC\r
+    \r
+    // Event Vertex AOD, ESD, ESDMC\r
+    else{\r
+      const AliVVertex *vertex = event->GetPrimaryVertex();\r
+      \r
       if(vertex) {\r
+       Double32_t fCov[6];\r
+       vertex->GetCovarianceMatrix(fCov);\r
        if(vertex->GetNContributors() > 0) {\r
-         if(vertex->GetZRes() != 0) {\r
-           fHistEventStats->Fill(3,fCentrality); //events with a proper vertex\r
-           if(TMath::Abs(vertex->GetXv()) < fVxMax) {\r
-             if(TMath::Abs(vertex->GetYv()) < fVyMax) {\r
-               if(TMath::Abs(vertex->GetZv()) < fVzMax) {\r
-                 fHistEventStats->Fill(4,fCentrality); //analayzed events\r
-                 fHistVx->Fill(vertex->GetXv());\r
-                 fHistVy->Fill(vertex->GetYv());\r
-                 fHistVz->Fill(vertex->GetZv(),fCentrality);\r
+         if(fCov[5] != 0) {\r
+           fHistEventStats->Fill(3,gCentrality); //events with a proper vertex\r
+           if(TMath::Abs(vertex->GetX()) < fVxMax) {\r
+             if(TMath::Abs(vertex->GetY()) < fVyMax) {\r
+               if(TMath::Abs(vertex->GetZ()) < fVzMax) {\r
+                 fHistEventStats->Fill(4,gCentrality); //analyzed events\r
+                 fHistVx->Fill(vertex->GetX());\r
+                 fHistVy->Fill(vertex->GetY());\r
+                 fHistVz->Fill(vertex->GetZ(),gCentrality);\r
                  \r
-                 //========Get the VZERO event plane========//\r
-                 Double_t gVZEROEventPlane = -10.0;\r
-                 Double_t qxTot = 0.0, qyTot = 0.0;\r
-                 AliEventplane *ep = gESD->GetEventplane();\r
-                 if(ep) \r
-                   gVZEROEventPlane = ep->CalculateVZEROEventPlane(gESD,10,2,qxTot,qyTot);\r
-                 if(gVZEROEventPlane < 0.) gVZEROEventPlane += TMath::Pi();\r
-                 gReactionPlane = gVZEROEventPlane*TMath::RadToDeg();\r
-                 fHistEventPlane->Fill(gReactionPlane,fCentrality);\r
-                 //========Get the VZERO event plane========//\r
-\r
-                 //Printf("There are %d tracks in this event", gESD->GetNumberOfTracks());\r
-                 for (Int_t iTracks = 0; iTracks < gESD->GetNumberOfTracks(); iTracks++) {\r
-                   AliESDtrack* track = dynamic_cast<AliESDtrack *>(gESD->GetTrack(iTracks));\r
-                   if (!track) {\r
-                     Printf("ERROR: Could not receive track %d", iTracks);\r
-                     continue;\r
-                   }   \r
-                   \r
-                   // take only TPC only tracks\r
-                   track_TPC   = new AliESDtrack();\r
-                   if(!track->FillTPCOnlyTrack(*track_TPC)) continue;\r
-                   \r
-                   //ESD track cuts\r
-                   if(fESDtrackCuts) \r
-                     if(!fESDtrackCuts->AcceptTrack(track_TPC)) continue;\r
-                   \r
-                   // fill QA histograms\r
-                   Float_t b[2];\r
-                   Float_t bCov[3];\r
-                   track_TPC->GetImpactParameters(b,bCov);\r
-                   if (bCov[0]<=0 || bCov[2]<=0) {\r
-                     AliDebug(1, "Estimated b resolution lower or equal zero!");\r
-                     bCov[0]=0; bCov[2]=0;\r
-                   }\r
-                   \r
-                   Int_t nClustersTPC = -1;\r
-                   nClustersTPC = track_TPC->GetTPCNclsIter1();   // TPC standalone\r
-                   //nClustersTPC = track->GetTPCclusters(0);   // global track\r
-                   Float_t chi2PerClusterTPC = -1;\r
-                   if (nClustersTPC!=0) {\r
-                     chi2PerClusterTPC = track_TPC->GetTPCchi2Iter1()/Float_t(nClustersTPC);      // TPC standalone\r
-                     //chi2PerClusterTPC = track->GetTPCchi2()/Float_t(nClustersTPC);     // global track\r
-                   }\r
-\r
-                   //===========================PID===============================//               \r
-                   if(fUsePID) {\r
-                     Double_t prob[AliPID::kSPECIES]={0.};\r
-                     Double_t probTPC[AliPID::kSPECIES]={0.};\r
-                     Double_t probTOF[AliPID::kSPECIES]={0.};\r
-                     Double_t probTPCTOF[AliPID::kSPECIES]={0.};\r
-\r
-                     Double_t nSigma = 0.;\r
-                      UInt_t detUsedTPC = 0;\r
-                     UInt_t detUsedTOF = 0;\r
-                      UInt_t detUsedTPCTOF = 0;\r
-\r
-                     //Decide what detector configuration we want to use\r
-                     switch(fPidDetectorConfig) {\r
-                     case kTPCpid:\r
-                       fPIDCombined->SetDetectorMask(AliPIDResponse::kDetTPC);\r
-                       nSigma = TMath::Abs(fPIDResponse->NumberOfSigmasTPC(track,(AliPID::EParticleType)fParticleOfInterest));\r
-                       detUsedTPC = fPIDCombined->ComputeProbabilities(track, fPIDResponse, probTPC);\r
-                       for(Int_t iSpecies = 0; iSpecies < AliPID::kSPECIES; iSpecies++)\r
-                         prob[iSpecies] = probTPC[iSpecies];\r
-                       break;\r
-                     case kTOFpid:\r
-                       fPIDCombined->SetDetectorMask(AliPIDResponse::kDetTOF);\r
-                       nSigma = TMath::Abs(fPIDResponse->NumberOfSigmasTOF(track,(AliPID::EParticleType)fParticleOfInterest));\r
-                       detUsedTOF = fPIDCombined->ComputeProbabilities(track, fPIDResponse, probTOF);\r
-                       for(Int_t iSpecies = 0; iSpecies < AliPID::kSPECIES; iSpecies++)\r
-                         prob[iSpecies] = probTOF[iSpecies];\r
-                       break;\r
-                     case kTPCTOF:\r
-                       fPIDCombined->SetDetectorMask(AliPIDResponse::kDetTOF|AliPIDResponse::kDetTPC);\r
-                       detUsedTPCTOF = fPIDCombined->ComputeProbabilities(track, fPIDResponse, probTPCTOF);\r
-                       for(Int_t iSpecies = 0; iSpecies < AliPID::kSPECIES; iSpecies++)\r
-                         prob[iSpecies] = probTPCTOF[iSpecies];\r
-                       break;\r
-                     default:\r
-                       break;\r
-                     }//end switch: define detector mask\r
-                     \r
-                     //Filling the PID QA\r
-                     Double_t tofTime = -999., length = 999., tof = -999.;\r
-                     Double_t c = TMath::C()*1.E-9;// m/ns\r
-                     Double_t beta = -999.;\r
-                     Double_t  nSigmaTOFForParticleOfInterest = -999.;\r
-                     if ( (track->IsOn(AliESDtrack::kTOFin)) &&\r
-                          (track->IsOn(AliESDtrack::kTIME))  ) { \r
-                       tofTime = track->GetTOFsignal();//in ps\r
-                       length = track->GetIntegratedLength();\r
-                       tof = tofTime*1E-3; // ns       \r
-                       \r
-                       if (tof <= 0) {\r
-                         //Printf("WARNING: track with negative TOF time found! Skipping this track for PID checks\n");\r
-                         continue;\r
-                       }\r
-                       if (length <= 0){\r
-                         //printf("WARNING: track with negative length found!Skipping this track for PID checks\n");\r
-                         continue;\r
-                       }\r
-                       \r
-                       length = length*0.01; // in meters\r
-                       tof = tof*c;\r
-                       beta = length/tof;\r
-                       \r
-                       nSigmaTOFForParticleOfInterest = fPIDResponse->NumberOfSigmasTOF(track,(AliPID::EParticleType)fParticleOfInterest);\r
-                       fHistBetavsPTOFbeforePID ->Fill(track->P()*track->Charge(),beta);\r
-                       fHistProbTOFvsPtbeforePID ->Fill(track->Pt(),probTOF[fParticleOfInterest]);\r
-                       fHistNSigmaTOFvsPtbeforePID ->Fill(track->Pt(),nSigmaTOFForParticleOfInterest);\r
-                     }//TOF signal \r
-                     \r
-                     \r
-                     Double_t  nSigmaTPCForParticleOfInterest = fPIDResponse->NumberOfSigmasTPC(track,(AliPID::EParticleType)fParticleOfInterest);\r
-                     fHistdEdxVsPTPCbeforePID -> Fill(track->P()*track->Charge(),track->GetTPCsignal());\r
-                     fHistProbTPCvsPtbeforePID -> Fill(track->Pt(),probTPC[fParticleOfInterest]); \r
-                     fHistNSigmaTPCvsPtbeforePID -> Fill(track->Pt(),nSigmaTPCForParticleOfInterest); \r
-                     fHistProbTPCTOFvsPtbeforePID -> Fill(track->Pt(),probTPCTOF[fParticleOfInterest]);\r
-                     //end of QA-before pid\r
-                     \r
-                     if ((detUsedTPC != 0)||(detUsedTOF != 0)||(detUsedTPCTOF != 0)) {\r
-                       //Make the decision based on the n-sigma\r
-                       if(fUsePIDnSigma) {\r
-                         if(nSigma > fPIDNSigma) continue;}\r
-                       \r
-                       //Make the decision based on the bayesian\r
-                       else if(fUsePIDPropabilities) {\r
-                         if(fParticleOfInterest != TMath::LocMax(AliPID::kSPECIES,prob)) continue;\r
-                         if (prob[fParticleOfInterest] < fMinAcceptedPIDProbability) continue;      \r
-                       }\r
-                       \r
-                       //Fill QA after the PID\r
-                       fHistBetavsPTOFafterPID ->Fill(track->P()*track->Charge(),beta);\r
-                       fHistProbTOFvsPtafterPID ->Fill(track->Pt(),probTOF[fParticleOfInterest]);\r
-                       fHistNSigmaTOFvsPtafterPID ->Fill(track->Pt(),nSigmaTOFForParticleOfInterest);\r
-                       \r
-                       fHistdEdxVsPTPCafterPID -> Fill(track->P()*track->Charge(),track->GetTPCsignal());\r
-                       fHistProbTPCvsPtafterPID -> Fill(track->Pt(),probTPC[fParticleOfInterest]); \r
-                       fHistProbTPCTOFvsPtafterPID -> Fill(track->Pt(),probTPCTOF[fParticleOfInterest]);\r
-                       fHistNSigmaTPCvsPtafterPID -> Fill(track->Pt(),nSigmaTPCForParticleOfInterest); \r
-                     }\r
-                     \r
-                     PostData(4, fHistListPIDQA);\r
-                   }\r
-                    //===========================PID===============================//\r
-                   v_charge = track_TPC->Charge();\r
-                   v_y      = track_TPC->Y();\r
-                   v_eta    = track_TPC->Eta();\r
-                   v_phi    = track_TPC->Phi() * TMath::RadToDeg();\r
-                   v_E      = track_TPC->E();\r
-                   v_pt     = track_TPC->Pt();\r
-                   track_TPC->PxPyPz(v_p);\r
-                   fHistClus->Fill(track_TPC->GetITSclusters(0),nClustersTPC);\r
-                   fHistDCA->Fill(b[1],b[0]);\r
-                   fHistChi2->Fill(chi2PerClusterTPC,fCentrality);\r
-                   fHistPt->Fill(v_pt,fCentrality);\r
-                   fHistEta->Fill(v_eta,fCentrality);\r
-                   fHistPhi->Fill(v_phi,fCentrality);\r
-                   fHistRapidity->Fill(v_y,fCentrality);\r
-                   if(v_charge > 0) fHistPhiPos->Fill(v_phi,fCentrality);\r
-                   else if(v_charge < 0) fHistPhiNeg->Fill(v_phi,fCentrality);\r
-\r
-                   // fill charge vector\r
-                   chargeVector[0]->push_back(v_charge);\r
-                   chargeVector[1]->push_back(v_y);\r
-                   chargeVector[2]->push_back(v_eta);\r
-                   chargeVector[3]->push_back(v_phi);\r
-                   chargeVector[4]->push_back(v_p[0]);\r
-                   chargeVector[5]->push_back(v_p[1]);\r
-                   chargeVector[6]->push_back(v_p[2]);\r
-                   chargeVector[7]->push_back(v_pt);\r
-                   chargeVector[8]->push_back(v_E);\r
-\r
-                   if(fRunShuffling) {\r
-                     chargeVectorShuffle[0]->push_back(v_charge);\r
-                     chargeVectorShuffle[1]->push_back(v_y);\r
-                     chargeVectorShuffle[2]->push_back(v_eta);\r
-                     chargeVectorShuffle[3]->push_back(v_phi);\r
-                     chargeVectorShuffle[4]->push_back(v_p[0]);\r
-                     chargeVectorShuffle[5]->push_back(v_p[1]);\r
-                     chargeVectorShuffle[6]->push_back(v_p[2]);\r
-                     chargeVectorShuffle[7]->push_back(v_pt);\r
-                     chargeVectorShuffle[8]->push_back(v_E);\r
-                   }\r
-                   \r
-                   delete track_TPC;\r
-                   \r
-                 } //track loop\r
+                 // take only events inside centrality class\r
+                 if((gCentrality > fCentralityPercentileMin) && (gCentrality < fCentralityPercentileMax)){\r
+                   fHistEventStats->Fill(5,gCentrality); //events with correct centrality\r
+                   return gCentrality;         \r
+                 }//centrality class\r
                }//Vz cut\r
              }//Vy cut\r
            }//Vx cut\r
@@ -642,569 +806,591 @@ void AliAnalysisTaskBFPsi::UserExec(Option_t *) {
        }//proper number of contributors\r
       }//vertex object valid\r
     }//triggered event \r
-  }//ESD analysis\r
+  }//AOD,ESD,ESDMC\r
   \r
-  //AOD analysis (vertex and track cuts also here!!!!)\r
-  else if(gAnalysisLevel == "AOD") {\r
-    AliAODEvent* gAOD = dynamic_cast<AliAODEvent*>(InputEvent()); // from TaskSE\r
-    if(!gAOD) {\r
-      Printf("ERROR: gAOD not available");\r
-      return;\r
-    }\r
+  // in all other cases return -1 (event not accepted)\r
+  return -1;\r
+}\r
 \r
-    AliAODHeader *aodHeader = gAOD->GetHeader();\r
 \r
-    // store offline trigger bits\r
-    fHistTriggerStats->Fill(aodHeader->GetOfflineTrigger());\r
+//________________________________________________________________________\r
+Double_t AliAnalysisTaskBFPsi::GetRefMultiOrCentrality(AliVEvent *event){\r
+    // Checks the Event cuts\r
+    // Fills Event statistics histograms\r
+  \r
+  Float_t gCentrality = -1.;\r
+  Double_t fMultiplicity = -100.;\r
+  TString gAnalysisLevel = fBalance->GetAnalysisLevel();\r
+  if(fEventClass == "Centrality"){\r
     \r
-    // event selection done in AliAnalysisTaskSE::Exec() --> this is not used\r
-    fHistEventStats->Fill(1,fCentrality); //all events\r
-    Bool_t isSelected = kTRUE;\r
-    if(fUseOfflineTrigger)\r
-      isSelected = ((AliInputEventHandler*)(AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler()))->IsEventSelected();\r
-    if(isSelected) {\r
-      fHistEventStats->Fill(2,fCentrality); //triggered events\r
-                 \r
-      //Centrality stuff (centrality in AOD header)\r
-      if(fUseCentrality) {\r
-       fCentrality = aodHeader->GetCentralityP()->GetCentralityPercentile(fCentralityEstimator.Data());\r
-       \r
-       // QA for centrality estimators\r
-       fHistCentStats->Fill(0.,aodHeader->GetCentralityP()->GetCentralityPercentile("V0M"));\r
-       fHistCentStats->Fill(1.,aodHeader->GetCentralityP()->GetCentralityPercentile("FMD"));\r
-       fHistCentStats->Fill(2.,aodHeader->GetCentralityP()->GetCentralityPercentile("TRK"));\r
-       fHistCentStats->Fill(3.,aodHeader->GetCentralityP()->GetCentralityPercentile("TKL"));\r
-       fHistCentStats->Fill(4.,aodHeader->GetCentralityP()->GetCentralityPercentile("CL0"));\r
-       fHistCentStats->Fill(5.,aodHeader->GetCentralityP()->GetCentralityPercentile("CL1"));\r
-       fHistCentStats->Fill(6.,aodHeader->GetCentralityP()->GetCentralityPercentile("V0MvsFMD"));\r
-       fHistCentStats->Fill(7.,aodHeader->GetCentralityP()->GetCentralityPercentile("TKLvsV0M"));\r
-       fHistCentStats->Fill(8.,aodHeader->GetCentralityP()->GetCentralityPercentile("ZEMvsZDC"));\r
-       \r
-       // take only events inside centrality class\r
-       if((fCentrality < fCentralityPercentileMin) || (fCentrality > fCentralityPercentileMax)) \r
-         return;\r
-       \r
-       // centrality QA (V0M)\r
-       fHistV0M->Fill(gAOD->GetVZEROData()->GetMTotV0A(), gAOD->GetVZEROData()->GetMTotV0C());\r
-       \r
-       // centrality QA (reference tracks)\r
-       fHistRefTracks->Fill(0.,aodHeader->GetRefMultiplicity());\r
-       fHistRefTracks->Fill(1.,aodHeader->GetRefMultiplicityPos());\r
-       fHistRefTracks->Fill(2.,aodHeader->GetRefMultiplicityNeg());\r
-       fHistRefTracks->Fill(3.,aodHeader->GetTPConlyRefMultiplicity());\r
-       fHistRefTracks->Fill(4.,aodHeader->GetNumberOfITSClusters(0));\r
-       fHistRefTracks->Fill(5.,aodHeader->GetNumberOfITSClusters(1));\r
-       fHistRefTracks->Fill(6.,aodHeader->GetNumberOfITSClusters(2));\r
-       fHistRefTracks->Fill(7.,aodHeader->GetNumberOfITSClusters(3));\r
-       fHistRefTracks->Fill(8.,aodHeader->GetNumberOfITSClusters(4));\r
-      }\r
 \r
-      const AliAODVertex *vertex = gAOD->GetPrimaryVertex();\r
-      \r
-      if(vertex) {\r
-       Double32_t fCov[6];\r
-       vertex->GetCovarianceMatrix(fCov);\r
-       \r
-       if(vertex->GetNContributors() > 0) {\r
-         if(fCov[5] != 0) {\r
-           fHistEventStats->Fill(3,fCentrality); //events with a proper vertex\r
-           if(TMath::Abs(vertex->GetX()) < fVxMax) {\r
-             if(TMath::Abs(vertex->GetY()) < fVyMax) {\r
-               if(TMath::Abs(vertex->GetZ()) < fVzMax) {\r
-                 fHistEventStats->Fill(4,fCentrality); //analyzed events\r
-                 fHistVx->Fill(vertex->GetX());\r
-                 fHistVy->Fill(vertex->GetY());\r
-                 fHistVz->Fill(vertex->GetZ(),fCentrality);\r
-       \r
-                 //========Get the VZERO event plane========//\r
-                 Double_t gVZEROEventPlane = -10.0;\r
-                 Double_t qxTot = 0.0, qyTot = 0.0;\r
-                 AliEventplane *ep = gAOD->GetEventplane();\r
-                 if(ep) \r
-                   gVZEROEventPlane = ep->CalculateVZEROEventPlane(gAOD,10,2,qxTot,qyTot);\r
-                 if(gVZEROEventPlane < 0.) gVZEROEventPlane += TMath::Pi();\r
-                 gReactionPlane = gVZEROEventPlane*TMath::RadToDeg();\r
-                 fHistEventPlane->Fill(gReactionPlane,fCentrality);\r
-                 //========Get the VZERO event plane========//\r
-\r
-                 //Printf("There are %d tracks in this event", gAOD->GetNumberOfTracks());\r
-                 for (Int_t iTracks = 0; iTracks < gAOD->GetNumberOfTracks(); iTracks++) {\r
-                   AliAODTrack* aodTrack = dynamic_cast<AliAODTrack *>(gAOD->GetTrack(iTracks));\r
-                   if (!aodTrack) {\r
-                     Printf("ERROR: Could not receive track %d", iTracks);\r
-                     continue;\r
-                   }\r
-                   \r
-                   // AOD track cuts\r
-                   \r
-                   // For ESD Filter Information: ANALYSIS/macros/AddTaskESDfilter.C\r
-                   // take only TPC only tracks \r
-                   fHistTrackStats->Fill(aodTrack->GetFilterMap());\r
-                   if(!aodTrack->TestFilterBit(nAODtrackCutBit)) continue;\r
-                   \r
-                   v_charge = aodTrack->Charge();\r
-                   v_y      = aodTrack->Y();\r
-                   v_eta    = aodTrack->Eta();\r
-                   v_phi    = aodTrack->Phi() * TMath::RadToDeg();\r
-                   v_E      = aodTrack->E();\r
-                   v_pt     = aodTrack->Pt();\r
-                   aodTrack->PxPyPz(v_p);\r
-                   \r
-                   Float_t DCAxy = aodTrack->DCA();      // this is the DCA from global track (not exactly what is cut on)\r
-                   Float_t DCAz  = aodTrack->ZAtDCA();   // this is the DCA from global track (not exactly what is cut on)\r
-                   \r
-                   \r
-                   // Kinematics cuts from ESD track cuts\r
-                   if( v_pt < fPtMin || v_pt > fPtMax)      continue;\r
-                   if (!fUsePID) {\r
-                     if( v_eta < fEtaMin || v_eta > fEtaMax)  continue;\r
-                   }\r
-                   else if (fUsePID){\r
-                     if( v_y < fEtaMin || v_y > fEtaMax)  continue;\r
-                   }\r
-\r
-                   // Extra DCA cuts (for systematic studies [!= -1])\r
-                   if( fDCAxyCut != -1 && fDCAzCut != -1){\r
-                     if(TMath::Sqrt((DCAxy*DCAxy)/(fDCAxyCut*fDCAxyCut)+(DCAz*DCAz)/(fDCAzCut*fDCAzCut)) > 1 ){\r
-                       continue;  // 2D cut\r
-                     }\r
-                   }\r
-                   \r
-                   // Extra TPC cuts (for systematic studies [!= -1])\r
-                   if( fTPCchi2Cut != -1 && aodTrack->Chi2perNDF() > fTPCchi2Cut){\r
-                     continue;\r
-                   }\r
-                   if( fNClustersTPCCut != -1 && aodTrack->GetTPCNcls() < fNClustersTPCCut){\r
-                     continue;\r
-                   }\r
-                   \r
-                   // fill QA histograms\r
-                   fHistClus->Fill(aodTrack->GetITSNcls(),aodTrack->GetTPCNcls());\r
-                   fHistDCA->Fill(DCAz,DCAxy);\r
-                   fHistChi2->Fill(aodTrack->Chi2perNDF(),fCentrality);\r
-                   fHistPt->Fill(v_pt,fCentrality);\r
-                   fHistEta->Fill(v_eta,fCentrality);\r
-                   fHistPhi->Fill(v_phi,fCentrality);\r
-                   fHistRapidity->Fill(v_y,fCentrality);\r
-                   if(v_charge > 0) fHistPhiPos->Fill(v_phi,fCentrality);\r
-                   else if(v_charge < 0) fHistPhiNeg->Fill(v_phi,fCentrality);\r
-\r
-                   // fill charge vector\r
-                   chargeVector[0]->push_back(v_charge);\r
-                   chargeVector[1]->push_back(v_y);\r
-                   chargeVector[2]->push_back(v_eta);\r
-                   chargeVector[3]->push_back(v_phi);\r
-                   chargeVector[4]->push_back(v_p[0]);\r
-                   chargeVector[5]->push_back(v_p[1]);\r
-                   chargeVector[6]->push_back(v_p[2]);\r
-                   chargeVector[7]->push_back(v_pt);\r
-                   chargeVector[8]->push_back(v_E);\r
-\r
-                   if(fRunShuffling) {\r
-                     chargeVectorShuffle[0]->push_back(v_charge);\r
-                     chargeVectorShuffle[1]->push_back(v_y);\r
-                     chargeVectorShuffle[2]->push_back(v_eta);\r
-                     chargeVectorShuffle[3]->push_back(v_phi);\r
-                     chargeVectorShuffle[4]->push_back(v_p[0]);\r
-                     chargeVectorShuffle[5]->push_back(v_p[1]);\r
-                     chargeVectorShuffle[6]->push_back(v_p[2]);\r
-                     chargeVectorShuffle[7]->push_back(v_pt);\r
-                     chargeVectorShuffle[8]->push_back(v_E);\r
-                   }\r
-                                   \r
-                   gNumberOfAcceptedTracks += 1;\r
-                   \r
-                 } //track loop\r
-               }//Vz cut\r
-             }//Vy cut\r
-           }//Vx cut\r
-         }//proper vertex resolution\r
-       }//proper number of contributors\r
-      }//vertex object valid\r
-    }//triggered event \r
-  }//AOD analysis\r
+    if(gAnalysisLevel == "AOD") { //centrality in AOD header\r
+      AliAODHeader *header = (AliAODHeader*) event->GetHeader();\r
+      if(header){\r
+        gCentrality = header->GetCentralityP()->GetCentralityPercentile(fCentralityEstimator.Data());\r
+      }//AOD header\r
+    }//AOD\r
+    \r
+    else if(gAnalysisLevel == "ESD" || gAnalysisLevel == "MCESD"){ // centrality class for ESDs or MC-ESDs\r
+      AliCentrality *centrality = event->GetCentrality();\r
+      gCentrality = centrality->GetCentralityPercentile(fCentralityEstimator.Data());\r
+    }//ESD\r
+    else if(gAnalysisLevel == "MC"){\r
+      Double_t gImpactParameter = 0.;\r
+      if(dynamic_cast<AliMCEvent*>(event)){\r
+       AliCollisionGeometry* headerH = dynamic_cast<AliCollisionGeometry*>(dynamic_cast<AliMCEvent*>(event)->GenEventHeader());      \r
+       if(headerH){\r
+         gImpactParameter = headerH->ImpactParameter();\r
+         gCentrality      = gImpactParameter;\r
+       }//MC header\r
+      }//MC event cast\r
+    }//MC\r
+    else{\r
+      gCentrality = -1.;\r
+    }\r
+  }//End if "Centrality"\r
+  if(fEventClass=="Multiplicity"&&gAnalysisLevel == "ESD"){\r
+    if(dynamic_cast<AliESDEvent*>(event)){\r
+      fMultiplicity = fESDtrackCuts->GetReferenceMultiplicity(dynamic_cast<AliESDEvent*>(event), AliESDtrackCuts::kTrackletsITSTPC,0.5);\r
+    }//AliESDevent cast\r
+  }\r
+  if(fEventClass=="Multiplicity"&&gAnalysisLevel != "ESD"){\r
+    AliAODHeader *header = (AliAODHeader*) event->GetHeader();\r
+    if(header){\r
+      fMultiplicity = header->GetRefMultiplicity();\r
+    }//AOD header\r
+  }\r
+  Double_t lReturnVal = -100;\r
+  if(fEventClass=="Multiplicity"){\r
+    lReturnVal = fMultiplicity;\r
+  }else if(fEventClass=="Centrality"){\r
+    lReturnVal = gCentrality;\r
+  }\r
+  return lReturnVal;\r
+}\r
 \r
-  //MC-ESD analysis\r
-  if(gAnalysisLevel == "MCESD") {\r
-    AliMCEvent*  mcEvent = MCEvent(); \r
-    if (!mcEvent) {\r
-      Printf("ERROR: mcEvent not available");\r
-      return;\r
+//________________________________________________________________________\r
+Double_t AliAnalysisTaskBFPsi::GetEventPlane(AliVEvent *event){\r
+  // Get the event plane\r
+\r
+  TString gAnalysisLevel = fBalance->GetAnalysisLevel();\r
+\r
+  Float_t gVZEROEventPlane    = -10.;\r
+  Float_t gReactionPlane      = -10.;\r
+  Double_t qxTot = 0.0, qyTot = 0.0;\r
+\r
+  //MC: from reaction plane\r
+  if(gAnalysisLevel == "MC"){\r
+    if(dynamic_cast<AliMCEvent*>(event)){\r
+      AliCollisionGeometry* headerH = dynamic_cast<AliCollisionGeometry*>(dynamic_cast<AliMCEvent*>(event)->GenEventHeader());    \r
+      if (headerH) {\r
+       gReactionPlane = headerH->ReactionPlaneAngle();\r
+       //gReactionPlane *= TMath::RadToDeg();\r
+      }//MC header\r
+    }//MC event cast\r
+  }//MC\r
+  \r
+  // AOD,ESD,ESDMC: from VZERO Event Plane\r
+  else{\r
+   \r
+    AliEventplane *ep = event->GetEventplane();\r
+    if(ep){ \r
+      gVZEROEventPlane = ep->CalculateVZEROEventPlane(event,10,2,qxTot,qyTot);\r
+      if(gVZEROEventPlane < 0.) gVZEROEventPlane += TMath::Pi();\r
+      //gReactionPlane = gVZEROEventPlane*TMath::RadToDeg();\r
+      gReactionPlane = gVZEROEventPlane;\r
     }\r
+  }//AOD,ESD,ESDMC\r
 \r
-    AliESDEvent* gESD = dynamic_cast<AliESDEvent*>(InputEvent()); // from TaskSE\r
-    if (!gESD) {\r
-      Printf("ERROR: gESD not available");\r
-      return;\r
+  return gReactionPlane;\r
+}\r
+\r
+//________________________________________________________________________\r
+Double_t AliAnalysisTaskBFPsi::GetTrackbyTrackCorrectionMatrix( Double_t vEta, \r
+                                                               Double_t vPhi, \r
+                                                               Double_t vPt, \r
+                                                               Short_t vCharge, \r
+                                                               Double_t gCentrality) {\r
+  // -- Get efficiency correction of particle dependent on (eta, phi, pt, charge, centrality) \r
+\r
+  Double_t correction = 1.;\r
+  Int_t binEta = 0, binPt = 0, binPhi = 0;\r
+\r
+  //Printf("EtaMAx: %lf - EtaMin: %lf - EtaBin: %lf", fEtaMaxForCorrections,fEtaMinForCorrections,fEtaBinForCorrections);\r
+  if(fEtaBinForCorrections != 0) {\r
+    Double_t widthEta = (fEtaMaxForCorrections - fEtaMinForCorrections)/fEtaBinForCorrections;\r
+    if(fEtaMaxForCorrections != fEtaMinForCorrections) \r
+      binEta = (Int_t)(vEta/widthEta)+1;\r
+  }\r
+\r
+  if(fPtBinForCorrections != 0) {\r
+    Double_t widthPt = (fPtMaxForCorrections - fPtMinForCorrections)/fPtBinForCorrections;\r
+    if(fPtMaxForCorrections != fPtMinForCorrections) \r
+      binPt = (Int_t)(vPt/widthPt) + 1;\r
+  }\r
\r
+  if(fPhiBinForCorrections != 0) {\r
+    Double_t widthPhi = (fPhiMaxForCorrections - fPhiMinForCorrections)/fPhiBinForCorrections;\r
+    if(fPhiMaxForCorrections != fPhiMinForCorrections) \r
+      binPhi = (Int_t)(vPhi/widthPhi)+ 1;\r
+  }\r
+\r
+  Int_t gCentralityInt = 1;\r
+  for (Int_t i=0; i<=kCENTRALITY; i++){\r
+    if((centralityArrayForPbPb[i] <= gCentrality)&&(gCentrality <= centralityArrayForPbPb[i+1]))\r
+      gCentralityInt = i;\r
+  }\r
+  \r
+  if(fHistMatrixCorrectionPlus[gCentralityInt]){\r
+    if (vCharge > 0) {\r
+      correction = fHistMatrixCorrectionPlus[gCentralityInt]->GetBinContent(fHistMatrixCorrectionPlus[gCentralityInt]->GetBin(binEta, binPt, binPhi));\r
+    }\r
+    if (vCharge < 0) {\r
+      correction = fHistMatrixCorrectionMinus[gCentralityInt]->GetBinContent(fHistMatrixCorrectionMinus[gCentralityInt]->GetBin(binEta, binPt, binPhi));\r
     }\r
+  }\r
+  else {\r
+    correction = 1.;\r
+  }\r
+  if (correction == 0.) { \r
+    AliError(Form("Should not happen : bin content = 0. >> eta: %.2f | phi : %.2f | pt : %.2f | cent %d",vEta, vPhi, vPt, gCentralityInt)); \r
+    correction = 1.; \r
+  } \r
+    \r
+  return correction;\r
+}\r
 \r
-    // store offline trigger bits\r
-    fHistTriggerStats->Fill(((AliInputEventHandler*)(AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler()))->IsEventSelected());\r
+//________________________________________________________________________\r
+TObjArray* AliAnalysisTaskBFPsi::GetAcceptedTracks(AliVEvent *event, Double_t gCentrality, Double_t gReactionPlane){\r
+  // Returns TObjArray with tracks after all track cuts (only for AOD!)\r
+  // Fills QA histograms\r
 \r
-    // event selection done in AliAnalysisTaskSE::Exec() --> this is not used\r
-    fHistEventStats->Fill(1,fCentrality); //all events\r
-    Bool_t isSelected = kTRUE;\r
-    if(fUseOfflineTrigger)\r
-      isSelected = ((AliInputEventHandler*)(AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler()))->IsEventSelected();\r
-    if(isSelected) {\r
-      fHistEventStats->Fill(2,fCentrality); //triggered events\r
+  TString gAnalysisLevel = fBalance->GetAnalysisLevel();\r
 \r
-      if(fUseCentrality) {\r
-       //Centrality stuff\r
-       AliCentrality *centrality = gESD->GetCentrality();\r
+  //output TObjArray holding all good tracks\r
+  TObjArray* tracksAccepted = new TObjArray;\r
+  tracksAccepted->SetOwner(kTRUE);\r
 \r
-       fCentrality = centrality->GetCentralityPercentile(fCentralityEstimator.Data());\r
-       \r
-       // take only events inside centrality class\r
-       if(!centrality->IsEventInCentralityClass(fCentralityPercentileMin,\r
-                                                fCentralityPercentileMax,\r
-                                                fCentralityEstimator.Data()))\r
-         return;\r
-       \r
-       // centrality QA (V0M)\r
-       fHistV0M->Fill(gESD->GetVZEROData()->GetMTotV0A(), gESD->GetVZEROData()->GetMTotV0C());\r
-      }\r
-       \r
-      const AliESDVertex *vertex = gESD->GetPrimaryVertex();\r
-      if(vertex) {\r
-       if(vertex->GetNContributors() > 0) {\r
-         if(vertex->GetZRes() != 0) {\r
-           fHistEventStats->Fill(3,fCentrality); //events with a proper vertex\r
-           if(TMath::Abs(vertex->GetXv()) < fVxMax) {\r
-             if(TMath::Abs(vertex->GetYv()) < fVyMax) {\r
-               if(TMath::Abs(vertex->GetZv()) < fVzMax) {\r
-                 fHistEventStats->Fill(4,fCentrality); //analayzed events\r
-                 fHistVx->Fill(vertex->GetXv());\r
-                 fHistVy->Fill(vertex->GetYv());\r
-                 fHistVz->Fill(vertex->GetZv(),fCentrality);\r
-                 \r
-                 //========Get the VZERO event plane========//\r
-                 Double_t gVZEROEventPlane = -10.0;\r
-                 Double_t qxTot = 0.0, qyTot = 0.0;\r
-                 AliEventplane *ep = gESD->GetEventplane();\r
-                 if(ep) \r
-                   gVZEROEventPlane = ep->CalculateVZEROEventPlane(gESD,10,2,qxTot,qyTot);\r
-                 if(gVZEROEventPlane < 0.) gVZEROEventPlane += TMath::Pi();\r
-                 gReactionPlane = gVZEROEventPlane*TMath::RadToDeg();\r
-                 fHistEventPlane->Fill(gReactionPlane,fCentrality);\r
-                 //========Get the VZERO event plane========//\r
-\r
-                 //Printf("There are %d tracks in this event", gESD->GetNumberOfTracks());\r
-                 for (Int_t iTracks = 0; iTracks < gESD->GetNumberOfTracks(); iTracks++) {\r
-                   AliESDtrack* track = dynamic_cast<AliESDtrack *>(gESD->GetTrack(iTracks));\r
-                   if (!track) {\r
-                     Printf("ERROR: Could not receive track %d", iTracks);\r
-                     continue;\r
-                   }   \r
-                   \r
-                   Int_t label = TMath::Abs(track->GetLabel());\r
-                   if(label > mcEvent->GetNumberOfTracks()) continue;\r
-                   if(label > mcEvent->GetNumberOfPrimaries()) continue;\r
-                   \r
-                   AliMCParticle* mcTrack = dynamic_cast<AliMCParticle *>(mcEvent->GetTrack(label));\r
-                   if(!mcTrack) continue;\r
-\r
-                   // take only TPC only tracks\r
-                   track_TPC   = new AliESDtrack();\r
-                   if(!track->FillTPCOnlyTrack(*track_TPC)) continue;\r
-                   \r
-                   //ESD track cuts\r
-                   if(fESDtrackCuts) \r
-                     if(!fESDtrackCuts->AcceptTrack(track_TPC)) continue;\r
-                   \r
-                   // fill QA histograms\r
-                   Float_t b[2];\r
-                   Float_t bCov[3];\r
-                   track_TPC->GetImpactParameters(b,bCov);\r
-                   if (bCov[0]<=0 || bCov[2]<=0) {\r
-                     AliDebug(1, "Estimated b resolution lower or equal zero!");\r
-                     bCov[0]=0; bCov[2]=0;\r
-                   }\r
-                   \r
-                   Int_t nClustersTPC = -1;\r
-                   nClustersTPC = track_TPC->GetTPCNclsIter1();   // TPC standalone\r
-                   //nClustersTPC = track->GetTPCclusters(0);   // global track\r
-                   Float_t chi2PerClusterTPC = -1;\r
-                   if (nClustersTPC!=0) {\r
-                     chi2PerClusterTPC = track_TPC->GetTPCchi2Iter1()/Float_t(nClustersTPC);      // TPC standalone\r
-                     //chi2PerClusterTPC = track->GetTPCchi2()/Float_t(nClustersTPC);     // global track\r
-                   }\r
-                   \r
-                   v_charge = track_TPC->Charge();\r
-                   v_y      = track_TPC->Y();\r
-                   v_eta    = track_TPC->Eta();\r
-                   v_phi    = track_TPC->Phi() * TMath::RadToDeg();\r
-                   v_E      = track_TPC->E();\r
-                   v_pt     = track_TPC->Pt();\r
-                   track_TPC->PxPyPz(v_p);\r
-\r
-                   fHistClus->Fill(track_TPC->GetITSclusters(0),nClustersTPC);\r
-                   fHistDCA->Fill(b[1],b[0]);\r
-                   fHistChi2->Fill(chi2PerClusterTPC,fCentrality);\r
-                   fHistPt->Fill(v_pt,fCentrality);\r
-                   fHistEta->Fill(v_eta,fCentrality);\r
-                   fHistPhi->Fill(v_phi,fCentrality);\r
-                   fHistRapidity->Fill(v_y,fCentrality);\r
-                   if(v_charge > 0) fHistPhiPos->Fill(v_phi,fCentrality);\r
-                   else if(v_charge < 0) fHistPhiNeg->Fill(v_phi,fCentrality);\r
-\r
-                   // fill charge vector\r
-                   chargeVector[0]->push_back(v_charge);\r
-                   chargeVector[1]->push_back(v_y);\r
-                   chargeVector[2]->push_back(v_eta);\r
-                   chargeVector[3]->push_back(v_phi);\r
-                   chargeVector[4]->push_back(v_p[0]);\r
-                   chargeVector[5]->push_back(v_p[1]);\r
-                   chargeVector[6]->push_back(v_p[2]);\r
-                   chargeVector[7]->push_back(v_pt);\r
-                   chargeVector[8]->push_back(v_E);\r
-\r
-                   if(fRunShuffling) {\r
-                     chargeVectorShuffle[0]->push_back(v_charge);\r
-                     chargeVectorShuffle[1]->push_back(v_y);\r
-                     chargeVectorShuffle[2]->push_back(v_eta);\r
-                     chargeVectorShuffle[3]->push_back(v_phi);\r
-                     chargeVectorShuffle[4]->push_back(v_p[0]);\r
-                     chargeVectorShuffle[5]->push_back(v_p[1]);\r
-                     chargeVectorShuffle[6]->push_back(v_p[2]);\r
-                     chargeVectorShuffle[7]->push_back(v_pt);\r
-                     chargeVectorShuffle[8]->push_back(v_E);\r
-                   }\r
-                   \r
-                   delete track_TPC;\r
-                   gNumberOfAcceptedTracks += 1;\r
-                   \r
-                 } //track loop\r
-               }//Vz cut\r
-             }//Vy cut\r
-           }//Vx cut\r
-         }//proper vertex resolution\r
-       }//proper number of contributors\r
-      }//vertex object valid\r
-    }//triggered event \r
-  }//MC-ESD analysis\r
+  Short_t vCharge;\r
+  Double_t vEta;\r
+  Double_t vY;\r
+  Double_t vPhi;\r
+  Double_t vPt;\r
 \r
-  //MC analysis\r
-  else if(gAnalysisLevel == "MC") {\r
-    AliMCEvent*  mcEvent = MCEvent(); \r
-    if (!mcEvent) {\r
-      Printf("ERROR: mcEvent not available");\r
-      return;\r
-    }\r
-    fHistEventStats->Fill(1,fCentrality); //total events\r
-    fHistEventStats->Fill(2,fCentrality); //offline trigger\r
 \r
-    Double_t gImpactParameter = 0.;\r
-    if(fUseCentrality) {\r
-      //Get the MC header\r
-      AliGenHijingEventHeader* headerH = dynamic_cast<AliGenHijingEventHeader*>(mcEvent->GenEventHeader());\r
-      if (headerH) {\r
-       //Printf("=====================================================");\r
-       //Printf("Reaction plane angle: %lf",headerH->ReactionPlaneAngle());\r
-       //Printf("Impact parameter: %lf",headerH->ImpactParameter());\r
-       //Printf("=====================================================");\r
-       gReactionPlane = headerH->ReactionPlaneAngle();\r
-       gImpactParameter = headerH->ImpactParameter();\r
-       fCentrality = gImpactParameter;\r
+  if(gAnalysisLevel == "AOD") { // handling of TPC only tracks different in AOD and ESD\r
+    // Loop over tracks in event\r
+    for (Int_t iTracks = 0; iTracks < event->GetNumberOfTracks(); iTracks++) {\r
+      AliAODTrack* aodTrack = dynamic_cast<AliAODTrack *>(event->GetTrack(iTracks));\r
+      if (!aodTrack) {\r
+       AliError(Form("Could not receive track %d", iTracks));\r
+       continue;\r
+      }\r
+      \r
+      // AOD track cuts\r
+      \r
+      // For ESD Filter Information: ANALYSIS/macros/AddTaskESDfilter.C\r
+      // take only TPC only tracks \r
+      //fHistTrackStats->Fill(aodTrack->GetFilterMap());\r
+      for(Int_t iTrackBit = 0; iTrackBit < 16; iTrackBit++){\r
+       fHistTrackStats->Fill(iTrackBit,aodTrack->TestFilterBit(1<<iTrackBit));\r
+      }\r
+      if(!aodTrack->TestFilterBit(nAODtrackCutBit)) continue;\r
+      \r
+      vCharge = aodTrack->Charge();\r
+      vEta    = aodTrack->Eta();\r
+      vY      = aodTrack->Y();\r
+      vPhi    = aodTrack->Phi();// * TMath::RadToDeg();\r
+      vPt     = aodTrack->Pt();\r
+      \r
+      Float_t dcaXY = aodTrack->DCA();      // this is the DCA from global track (not exactly what is cut on)\r
+      Float_t dcaZ  = aodTrack->ZAtDCA();   // this is the DCA from global track (not exactly what is cut on)\r
+      \r
+      \r
+      // Kinematics cuts from ESD track cuts\r
+      if( vPt < fPtMin || vPt > fPtMax)      continue;\r
+      if( vEta < fEtaMin || vEta > fEtaMax)  continue;\r
+      \r
+      // Extra DCA cuts (for systematic studies [!= -1])\r
+      if( fDCAxyCut != -1 && fDCAzCut != -1){\r
+       if(TMath::Sqrt((dcaXY*dcaXY)/(fDCAxyCut*fDCAxyCut)+(dcaZ*dcaZ)/(fDCAzCut*fDCAzCut)) > 1 ){\r
+         continue;  // 2D cut\r
+       }\r
+      }\r
+      \r
+      // Extra TPC cuts (for systematic studies [!= -1])\r
+      if( fTPCchi2Cut != -1 && aodTrack->Chi2perNDF() > fTPCchi2Cut){\r
+       continue;\r
+      }\r
+      if( fNClustersTPCCut != -1 && aodTrack->GetTPCNcls() < fNClustersTPCCut){\r
+       continue;\r
       }\r
-      fCentrality = gImpactParameter;\r
-      fHistEventPlane->Fill(gReactionPlane*TMath::RadToDeg(),fCentrality);\r
+      \r
+      // fill QA histograms\r
+      fHistClus->Fill(aodTrack->GetITSNcls(),aodTrack->GetTPCNcls());\r
+      fHistDCA->Fill(dcaZ,dcaXY);\r
+      fHistChi2->Fill(aodTrack->Chi2perNDF(),gCentrality);\r
+      fHistPt->Fill(vPt,gCentrality);\r
+      fHistEta->Fill(vEta,gCentrality);\r
+      fHistRapidity->Fill(vY,gCentrality);\r
+      if(vCharge > 0) fHistPhiPos->Fill(vPhi,gCentrality);\r
+      else if(vCharge < 0) fHistPhiNeg->Fill(vPhi,gCentrality);\r
+      fHistPhi->Fill(vPhi,gCentrality);\r
+      \r
+      //=======================================correction\r
+      Double_t correction = GetTrackbyTrackCorrectionMatrix(vEta, vPhi, vPt, vCharge, gCentrality);  \r
+      \r
+      // add the track to the TObjArray\r
+      tracksAccepted->Add(new AliBFBasicParticle(vEta, vPhi, vPt, vCharge, correction));  \r
+    }//track loop\r
+  }// AOD analysis\r
 \r
-      // take only events inside centrality class (DIDN'T CHANGE THIS UP TO NOW)\r
-      if((fImpactParameterMin > gImpactParameter) || (fImpactParameterMax < gImpactParameter))\r
-       return;\r
-    }\r
+\r
+  else if(gAnalysisLevel == "ESD" || gAnalysisLevel == "MCESD") { // handling of TPC only tracks different in AOD and ESD\r
+\r
+    AliESDtrack *trackTPC   = NULL;\r
+    AliMCParticle *mcTrack   = NULL;\r
+\r
+    AliMCEvent*  mcEvent     = NULL;\r
     \r
-    AliGenEventHeader *header = mcEvent->GenEventHeader();\r
-    if(!header) return;\r
+    // for MC ESDs use also MC information\r
+    if(gAnalysisLevel == "MCESD"){\r
+      mcEvent = MCEvent(); \r
+      if (!mcEvent) {\r
+       AliError("mcEvent not available");\r
+       return tracksAccepted;\r
+      }\r
+    }\r
     \r
-    TArrayF gVertexArray;\r
-    header->PrimaryVertex(gVertexArray);\r
-    //Printf("Vertex: %lf (x) - %lf (y) - %lf (z)",\r
-    //gVertexArray.At(0),\r
-    //gVertexArray.At(1),\r
-    //gVertexArray.At(2));\r
-    fHistEventStats->Fill(3,fCentrality); //events with a proper vertex\r
-    if(TMath::Abs(gVertexArray.At(0)) < fVxMax) {\r
-      if(TMath::Abs(gVertexArray.At(1)) < fVyMax) {\r
-       if(TMath::Abs(gVertexArray.At(2)) < fVzMax) {\r
-         fHistEventStats->Fill(4,fCentrality); //analayzed events\r
-         fHistVx->Fill(gVertexArray.At(0));\r
-         fHistVy->Fill(gVertexArray.At(1));\r
-         fHistVz->Fill(gVertexArray.At(2),fCentrality);\r
+    // Loop over tracks in event\r
+    for (Int_t iTracks = 0; iTracks < event->GetNumberOfTracks(); iTracks++) {\r
+      AliESDtrack* track = dynamic_cast<AliESDtrack *>(event->GetTrack(iTracks));\r
+      if (!track) {\r
+       AliError(Form("Could not receive track %d", iTracks));\r
+       continue;\r
+      }        \r
+\r
+      // for MC ESDs use also MC information --> MC track not used further???\r
+      if(gAnalysisLevel == "MCESD"){\r
+       Int_t label = TMath::Abs(track->GetLabel());\r
+       if(label > mcEvent->GetNumberOfTracks()) continue;\r
+       if(label > mcEvent->GetNumberOfPrimaries()) continue;\r
+       \r
+       mcTrack = dynamic_cast<AliMCParticle *>(mcEvent->GetTrack(label));\r
+       if(!mcTrack) continue;\r
+      }\r
+\r
+      // take only TPC only tracks\r
+      trackTPC   = new AliESDtrack();\r
+      if(!track->FillTPCOnlyTrack(*trackTPC)) continue;\r
+      \r
+      //ESD track cuts\r
+      if(fESDtrackCuts) \r
+       if(!fESDtrackCuts->AcceptTrack(trackTPC)) continue;\r
+      \r
+      // fill QA histograms\r
+      Float_t b[2];\r
+      Float_t bCov[3];\r
+      trackTPC->GetImpactParameters(b,bCov);\r
+      if (bCov[0]<=0 || bCov[2]<=0) {\r
+       AliDebug(1, "Estimated b resolution lower or equal zero!");\r
+       bCov[0]=0; bCov[2]=0;\r
+      }\r
+      \r
+      Int_t nClustersTPC = -1;\r
+      nClustersTPC = trackTPC->GetTPCNclsIter1();   // TPC standalone\r
+      //nClustersTPC = track->GetTPCclusters(0);   // global track\r
+      Float_t chi2PerClusterTPC = -1;\r
+      if (nClustersTPC!=0) {\r
+       chi2PerClusterTPC = trackTPC->GetTPCchi2Iter1()/Float_t(nClustersTPC);      // TPC standalone\r
+       //chi2PerClusterTPC = track->GetTPCchi2()/Float_t(nClustersTPC);     // global track\r
+      }\r
+      \r
+      //===========================PID===============================//                    \r
+      if(fUsePID) {\r
+       Double_t prob[AliPID::kSPECIES]={0.};\r
+       Double_t probTPC[AliPID::kSPECIES]={0.};\r
+       Double_t probTOF[AliPID::kSPECIES]={0.};\r
+       Double_t probTPCTOF[AliPID::kSPECIES]={0.};\r
+       \r
+       Double_t nSigma = 0.;\r
+       UInt_t detUsedTPC = 0;\r
+       UInt_t detUsedTOF = 0;\r
+       UInt_t detUsedTPCTOF = 0;\r
+       \r
+       //Decide what detector configuration we want to use\r
+       switch(fPidDetectorConfig) {\r
+       case kTPCpid:\r
+         fPIDCombined->SetDetectorMask(AliPIDResponse::kDetTPC);\r
+         nSigma = TMath::Abs(fPIDResponse->NumberOfSigmasTPC(track,(AliPID::EParticleType)fParticleOfInterest));\r
+         detUsedTPC = fPIDCombined->ComputeProbabilities(track, fPIDResponse, probTPC);\r
+         for(Int_t iSpecies = 0; iSpecies < AliPID::kSPECIES; iSpecies++)\r
+           prob[iSpecies] = probTPC[iSpecies];\r
+         break;\r
+       case kTOFpid:\r
+         fPIDCombined->SetDetectorMask(AliPIDResponse::kDetTOF);\r
+         nSigma = TMath::Abs(fPIDResponse->NumberOfSigmasTOF(track,(AliPID::EParticleType)fParticleOfInterest));\r
+         detUsedTOF = fPIDCombined->ComputeProbabilities(track, fPIDResponse, probTOF);\r
+         for(Int_t iSpecies = 0; iSpecies < AliPID::kSPECIES; iSpecies++)\r
+           prob[iSpecies] = probTOF[iSpecies];\r
+         break;\r
+       case kTPCTOF:\r
+         fPIDCombined->SetDetectorMask(AliPIDResponse::kDetTOF|AliPIDResponse::kDetTPC);\r
+         detUsedTPCTOF = fPIDCombined->ComputeProbabilities(track, fPIDResponse, probTPCTOF);\r
+         for(Int_t iSpecies = 0; iSpecies < AliPID::kSPECIES; iSpecies++)\r
+           prob[iSpecies] = probTPCTOF[iSpecies];\r
+         break;\r
+       default:\r
+         break;\r
+       }//end switch: define detector mask\r
+       \r
+       //Filling the PID QA\r
+       Double_t tofTime = -999., length = 999., tof = -999.;\r
+       Double_t c = TMath::C()*1.E-9;// m/ns\r
+       Double_t beta = -999.;\r
+       Double_t  nSigmaTOFForParticleOfInterest = -999.;\r
+       if ( (track->IsOn(AliESDtrack::kTOFin)) &&\r
+            (track->IsOn(AliESDtrack::kTIME))  ) { \r
+         tofTime = track->GetTOFsignal();//in ps\r
+         length = track->GetIntegratedLength();\r
+         tof = tofTime*1E-3; // ns     \r
          \r
-         Printf("There are %d tracks in this event", mcEvent->GetNumberOfPrimaries());\r
-         for (Int_t iTracks = 0; iTracks < mcEvent->GetNumberOfPrimaries(); iTracks++) {\r
-           AliMCParticle* track = dynamic_cast<AliMCParticle *>(mcEvent->GetTrack(iTracks));\r
-           if (!track) {\r
-             Printf("ERROR: Could not receive particle %d", iTracks);\r
-             continue;\r
-           }\r
-           \r
-           //exclude non stable particles\r
-           if(!mcEvent->IsPhysicalPrimary(iTracks)) continue;\r
+         if (tof <= 0) {\r
+           //Printf("WARNING: track with negative TOF time found! Skipping this track for PID checks\n");\r
+           continue;\r
+         }\r
+         if (length <= 0){\r
+           //printf("WARNING: track with negative length found!Skipping this track for PID checks\n");\r
+           continue;\r
+         }\r
+         \r
+         length = length*0.01; // in meters\r
+         tof = tof*c;\r
+         beta = length/tof;\r
+         \r
+         nSigmaTOFForParticleOfInterest = fPIDResponse->NumberOfSigmasTOF(track,(AliPID::EParticleType)fParticleOfInterest);\r
+         fHistBetavsPTOFbeforePID ->Fill(track->P()*track->Charge(),beta);\r
+         fHistProbTOFvsPtbeforePID ->Fill(track->Pt(),probTOF[fParticleOfInterest]);\r
+         fHistNSigmaTOFvsPtbeforePID ->Fill(track->Pt(),nSigmaTOFForParticleOfInterest);\r
+       }//TOF signal \r
+       \r
+       \r
+       Double_t  nSigmaTPCForParticleOfInterest = fPIDResponse->NumberOfSigmasTPC(track,(AliPID::EParticleType)fParticleOfInterest);\r
+       fHistdEdxVsPTPCbeforePID -> Fill(track->P()*track->Charge(),track->GetTPCsignal());\r
+       fHistProbTPCvsPtbeforePID -> Fill(track->Pt(),probTPC[fParticleOfInterest]); \r
+       fHistNSigmaTPCvsPtbeforePID -> Fill(track->Pt(),nSigmaTPCForParticleOfInterest); \r
+       fHistProbTPCTOFvsPtbeforePID -> Fill(track->Pt(),probTPCTOF[fParticleOfInterest]);\r
+       //end of QA-before pid\r
+       \r
+       if ((detUsedTPC != 0)||(detUsedTOF != 0)||(detUsedTPCTOF != 0)) {\r
+         //Make the decision based on the n-sigma\r
+         if(fUsePIDnSigma) {\r
+           if(nSigma > fPIDNSigma) continue;}\r
+         \r
+         //Make the decision based on the bayesian\r
+         else if(fUsePIDPropabilities) {\r
+           if(fParticleOfInterest != TMath::LocMax(AliPID::kSPECIES,prob)) continue;\r
+           if (prob[fParticleOfInterest] < fMinAcceptedPIDProbability) continue;      \r
+         }\r
+         \r
+         //Fill QA after the PID\r
+         fHistBetavsPTOFafterPID ->Fill(track->P()*track->Charge(),beta);\r
+         fHistProbTOFvsPtafterPID ->Fill(track->Pt(),probTOF[fParticleOfInterest]);\r
+         fHistNSigmaTOFvsPtafterPID ->Fill(track->Pt(),nSigmaTOFForParticleOfInterest);\r
+         \r
+         fHistdEdxVsPTPCafterPID -> Fill(track->P()*track->Charge(),track->GetTPCsignal());\r
+         fHistProbTPCvsPtafterPID -> Fill(track->Pt(),probTPC[fParticleOfInterest]); \r
+         fHistProbTPCTOFvsPtafterPID -> Fill(track->Pt(),probTPCTOF[fParticleOfInterest]);\r
+         fHistNSigmaTPCvsPtafterPID -> Fill(track->Pt(),nSigmaTPCForParticleOfInterest); \r
+       }\r
+      }\r
+      //===========================PID===============================//\r
+      vCharge = trackTPC->Charge();\r
+      vY      = trackTPC->Y();\r
+      vEta    = trackTPC->Eta();\r
+      vPhi    = trackTPC->Phi();// * TMath::RadToDeg();\r
+      vPt     = trackTPC->Pt();\r
+      fHistClus->Fill(trackTPC->GetITSclusters(0),nClustersTPC);\r
+      fHistDCA->Fill(b[1],b[0]);\r
+      fHistChi2->Fill(chi2PerClusterTPC,gCentrality);\r
+      fHistPt->Fill(vPt,gCentrality);\r
+      fHistEta->Fill(vEta,gCentrality);\r
+      fHistPhi->Fill(vPhi,gCentrality);\r
+      fHistRapidity->Fill(vY,gCentrality);\r
+      if(vCharge > 0) fHistPhiPos->Fill(vPhi,gCentrality);\r
+      else if(vCharge < 0) fHistPhiNeg->Fill(vPhi,gCentrality);\r
+      \r
+      //=======================================correction\r
+      Double_t correction = GetTrackbyTrackCorrectionMatrix(vEta, vPhi, vPt, vCharge, gCentrality);  \r
 \r
-           v_eta    = track->Eta();\r
-           v_pt     = track->Pt();\r
-           v_y      = track->Y();\r
+      // add the track to the TObjArray\r
+      tracksAccepted->Add(new AliBFBasicParticle(vEta, vPhi, vPt, vCharge, correction));   \r
 \r
-           if( v_pt < fPtMin || v_pt > fPtMax)      \r
-             continue;\r
-           if (!fUsePID) {\r
-             if( v_eta < fEtaMin || v_eta > fEtaMax)  continue;\r
-           }\r
-           else if (fUsePID){\r
-             if( v_y < fEtaMin || v_y > fEtaMax)  continue;\r
-           }\r
+      delete trackTPC;\r
+    }//track loop\r
+  }// ESD analysis\r
 \r
-           //analyze one set of particles\r
-           if(fUseMCPdgCode) {\r
-             TParticle *particle = track->Particle();\r
-             if(!particle) continue;\r
-             \r
-             Int_t gPdgCode = particle->GetPdgCode();\r
-             if(TMath::Abs(fPDGCodeToBeAnalyzed) != TMath::Abs(gPdgCode)) \r
-               continue;\r
-           }\r
-           \r
-           //Use the acceptance parameterization\r
-           if(fAcceptanceParameterization) {\r
-             Double_t gRandomNumber = gRandom->Rndm();\r
-             if(gRandomNumber > fAcceptanceParameterization->Eval(track->Pt())) \r
-               continue;\r
-           }\r
+  else if(gAnalysisLevel == "MC"){\r
+    \r
+    // Loop over tracks in event\r
+    for (Int_t iTracks = 0; iTracks < dynamic_cast<AliMCEvent*>(event)->GetNumberOfPrimaries(); iTracks++) {\r
+      AliMCParticle* track = dynamic_cast<AliMCParticle *>(event->GetTrack(iTracks));\r
+      if (!track) {\r
+       AliError(Form("Could not receive particle %d", iTracks));\r
+       continue;\r
+      }\r
            \r
-           //Exclude resonances\r
-           if(fExcludeResonancesInMC) {\r
-             TParticle *particle = track->Particle();\r
-             if(!particle) continue;\r
-             \r
-             Bool_t kExcludeParticle = kFALSE;\r
-             Int_t gMotherIndex = particle->GetFirstMother();\r
-             if(gMotherIndex != -1) {\r
-               AliMCParticle* motherTrack = dynamic_cast<AliMCParticle *>(mcEvent->GetTrack(gMotherIndex));\r
-               if(motherTrack) {\r
-                 TParticle *motherParticle = motherTrack->Particle();\r
-                 if(motherParticle) {\r
-                   Int_t pdgCodeOfMother = motherParticle->GetPdgCode();\r
-                   //if((pdgCodeOfMother == 113)||(pdgCodeOfMother == 213)||(pdgCodeOfMother == 221)||(pdgCodeOfMother == 223)||(pdgCodeOfMother == 331)||(pdgCodeOfMother == 333)) {\r
-                   if(pdgCodeOfMother == 113) {\r
-                     kExcludeParticle = kTRUE;\r
-                   }\r
-                 }\r
-               }\r
-             }\r
-             \r
-             //Exclude from the analysis decay products of rho0, rho+, eta, eta' and phi\r
-             if(kExcludeParticle) continue;\r
-           }\r
+      //exclude non stable particles\r
+      if(!(dynamic_cast<AliMCEvent*>(event)->IsPhysicalPrimary(iTracks))) continue;\r
 \r
-           v_charge = track->Charge();\r
-           v_phi    = track->Phi();\r
-           v_E      = track->E();\r
-           track->PxPyPz(v_p);\r
-           //Printf("phi (before): %lf",v_phi);\r
-\r
-           fHistPt->Fill(v_pt,fCentrality);\r
-           fHistEta->Fill(v_eta,fCentrality);\r
-           fHistPhi->Fill(v_phi*TMath::RadToDeg(),fCentrality);\r
-           fHistRapidity->Fill(v_y,fCentrality);\r
-           if(v_charge > 0) fHistPhiPos->Fill(v_phi*TMath::RadToDeg(),fCentrality);\r
-           else if(v_charge < 0) fHistPhiNeg->Fill(v_phi*TMath::RadToDeg(),fCentrality);\r
-\r
-           //Flow after burner\r
-           if(fUseFlowAfterBurner) {\r
-             Double_t precisionPhi = 0.001;\r
-             Int_t maxNumberOfIterations = 100;\r
-\r
-             Double_t phi0 = v_phi;\r
-             Double_t gV2 = fDifferentialV2->Eval(v_pt);\r
-\r
-             for (Int_t j = 0; j < maxNumberOfIterations; j++) {\r
-               Double_t phiprev = v_phi;\r
-               Double_t fl = v_phi - phi0 + gV2*TMath::Sin(2.*(v_phi - gReactionPlane));\r
-               Double_t fp = 1.0 + 2.0*gV2*TMath::Cos(2.*(v_phi - gReactionPlane)); \r
-               v_phi -= fl/fp;\r
-               if (TMath::AreEqualAbs(phiprev,v_phi,precisionPhi)) break;\r
+      vEta    = track->Eta();\r
+      vPt     = track->Pt();\r
+      vY      = track->Y();\r
+      \r
+      if( vPt < fPtMin || vPt > fPtMax)      \r
+       continue;\r
+      if (!fUsePID) {\r
+       if( vEta < fEtaMin || vEta > fEtaMax)  continue;\r
+      }\r
+      else if (fUsePID){\r
+       if( vY < fEtaMin || vY > fEtaMax)  continue;\r
+      }\r
+      \r
+      //analyze one set of particles\r
+      if(fUseMCPdgCode) {\r
+       TParticle *particle = track->Particle();\r
+       if(!particle) continue;\r
+       \r
+       Int_t gPdgCode = particle->GetPdgCode();\r
+       if(TMath::Abs(fPDGCodeToBeAnalyzed) != TMath::Abs(gPdgCode)) \r
+         continue;\r
+      }\r
+      \r
+      //Use the acceptance parameterization\r
+      if(fAcceptanceParameterization) {\r
+       Double_t gRandomNumber = gRandom->Rndm();\r
+       if(gRandomNumber > fAcceptanceParameterization->Eval(track->Pt())) \r
+         continue;\r
+      }\r
+      \r
+      //Exclude resonances\r
+      if(fExcludeResonancesInMC) {\r
+       TParticle *particle = track->Particle();\r
+       if(!particle) continue;\r
+       \r
+       Bool_t kExcludeParticle = kFALSE;\r
+       Int_t gMotherIndex = particle->GetFirstMother();\r
+       if(gMotherIndex != -1) {\r
+         AliMCParticle* motherTrack = dynamic_cast<AliMCParticle *>(event->GetTrack(gMotherIndex));\r
+         if(motherTrack) {\r
+           TParticle *motherParticle = motherTrack->Particle();\r
+           if(motherParticle) {\r
+             Int_t pdgCodeOfMother = motherParticle->GetPdgCode();\r
+             //if((pdgCodeOfMother == 113)||(pdgCodeOfMother == 213)||(pdgCodeOfMother == 221)||(pdgCodeOfMother == 223)||(pdgCodeOfMother == 331)||(pdgCodeOfMother == 333)) {\r
+             if(pdgCodeOfMother == 113) {\r
+               kExcludeParticle = kTRUE;\r
              }\r
-             //Printf("phi (after): %lf\n",v_phi);\r
-                     Double_t v_DeltaphiBefore = phi0 - gReactionPlane;\r
-             if(v_DeltaphiBefore < 0) v_DeltaphiBefore += 2*TMath::Pi();\r
-             fHistPhiBefore->Fill(v_DeltaphiBefore,fCentrality);\r
-\r
-             Double_t v_DeltaphiAfter = v_phi - gReactionPlane;\r
-             if(v_DeltaphiAfter < 0) v_DeltaphiAfter += 2*TMath::Pi();\r
-             fHistPhiAfter->Fill(v_DeltaphiAfter,fCentrality);\r
-           }\r
-           \r
-           v_phi *= TMath::RadToDeg();\r
-\r
-           // fill charge vector\r
-           chargeVector[0]->push_back(v_charge);\r
-           chargeVector[1]->push_back(v_y);\r
-           chargeVector[2]->push_back(v_eta);\r
-           chargeVector[3]->push_back(v_phi);\r
-           chargeVector[4]->push_back(v_p[0]);\r
-           chargeVector[5]->push_back(v_p[1]);\r
-           chargeVector[6]->push_back(v_p[2]);\r
-           chargeVector[7]->push_back(v_pt);\r
-           chargeVector[8]->push_back(v_E);\r
-           \r
-           if(fRunShuffling) {\r
-             chargeVectorShuffle[0]->push_back(v_charge);\r
-             chargeVectorShuffle[1]->push_back(v_y);\r
-             chargeVectorShuffle[2]->push_back(v_eta);\r
-             chargeVectorShuffle[3]->push_back(v_phi);\r
-             chargeVectorShuffle[4]->push_back(v_p[0]);\r
-             chargeVectorShuffle[5]->push_back(v_p[1]);\r
-             chargeVectorShuffle[6]->push_back(v_p[2]);\r
-             chargeVectorShuffle[7]->push_back(v_pt);\r
-             chargeVectorShuffle[8]->push_back(v_E);\r
            }\r
-           gNumberOfAcceptedTracks += 1;\r
-                   \r
-         } //track loop\r
-         gReactionPlane *= TMath::RadToDeg();\r
-       }//Vz cut\r
-      }//Vy cut\r
-    }//Vx cut\r
-  }//MC analysis\r
-  \r
-  //multiplicity cut (used in pp)\r
-  if(fUseMultiplicity) {\r
-    if((gNumberOfAcceptedTracks < fNumberOfAcceptedTracksMin)||(gNumberOfAcceptedTracks > fNumberOfAcceptedTracksMax))\r
-      return;\r
-  }\r
-  fHistNumberOfAcceptedTracks->Fill(gNumberOfAcceptedTracks,fCentrality);\r
+         }\r
+       }\r
+       \r
+       //Exclude from the analysis decay products of rho0, rho+, eta, eta' and phi\r
+       if(kExcludeParticle) continue;\r
+      }\r
+      \r
+      vCharge = track->Charge();\r
+      vPhi    = track->Phi();\r
+      //Printf("phi (before): %lf",vPhi);\r
+      \r
+      fHistPt->Fill(vPt,gCentrality);\r
+      fHistEta->Fill(vEta,gCentrality);\r
+      fHistPhi->Fill(vPhi,gCentrality);\r
+      //fHistPhi->Fill(vPhi*TMath::RadToDeg(),gCentrality);\r
+      fHistRapidity->Fill(vY,gCentrality);\r
+      //if(vCharge > 0) fHistPhiPos->Fill(vPhi*TMath::RadToDeg(),gCentrality);\r
+      //else if(vCharge < 0) fHistPhiNeg->Fill(vPhi*TMath::RadToDeg(),gCentrality);\r
+      if(vCharge > 0) fHistPhiPos->Fill(vPhi,gCentrality);\r
+      else if(vCharge < 0) fHistPhiNeg->Fill(vPhi,gCentrality);\r
+      \r
+      //Flow after burner\r
+      if(fUseFlowAfterBurner) {\r
+       Double_t precisionPhi = 0.001;\r
+       Int_t maxNumberOfIterations = 100;\r
+       \r
+       Double_t phi0 = vPhi;\r
+       Double_t gV2 = fDifferentialV2->Eval(vPt);\r
+       \r
+       for (Int_t j = 0; j < maxNumberOfIterations; j++) {\r
+         Double_t phiprev = vPhi;\r
+         Double_t fl = vPhi - phi0 + gV2*TMath::Sin(2.*(vPhi - gReactionPlane*TMath::DegToRad()));\r
+         Double_t fp = 1.0 + 2.0*gV2*TMath::Cos(2.*(vPhi - gReactionPlane*TMath::DegToRad())); \r
+         vPhi -= fl/fp;\r
+         if (TMath::AreEqualAbs(phiprev,vPhi,precisionPhi)) break;\r
+       }\r
+       //Printf("phi (after): %lf\n",vPhi);\r
+       Double_t vDeltaphiBefore = phi0 - gReactionPlane*TMath::DegToRad();\r
+       if(vDeltaphiBefore < 0) vDeltaphiBefore += 2*TMath::Pi();\r
+       fHistPhiBefore->Fill(vDeltaphiBefore,gCentrality);\r
+       \r
+       Double_t vDeltaphiAfter = vPhi - gReactionPlane*TMath::DegToRad();\r
+       if(vDeltaphiAfter < 0) vDeltaphiAfter += 2*TMath::Pi();\r
+       fHistPhiAfter->Fill(vDeltaphiAfter,gCentrality);\r
+      \r
+      }\r
+      \r
+      //vPhi *= TMath::RadToDeg();\r
+\r
+      //=======================================correction\r
+      Double_t correction = GetTrackbyTrackCorrectionMatrix(vEta, vPhi, vPt, vCharge, gCentrality);  \r
+      \r
+      tracksAccepted->Add(new AliBFBasicParticle(vEta, vPhi, vPt, vCharge, correction)); \r
+      \r
+    } //track loop\r
+  }//MC\r
   \r
-  // calculate balance function\r
-  if(fUseMultiplicity) \r
-    //fBalance->CalculateBalance(gNumberOfAcceptedTracks,gReactionPlane,chargeVector);\r
-    fBalance->CalculateBalance(gReactionPlane,chargeVector);\r
-  else                 \r
-    fBalance->CalculateBalance(gReactionPlane,chargeVector);\r
+  return tracksAccepted;  \r
+}\r
+//________________________________________________________________________\r
+TObjArray* AliAnalysisTaskBFPsi::GetShuffledTracks(TObjArray *tracks, Double_t gCentrality){\r
+  // Clones TObjArray and returns it with tracks after shuffling the charges\r
 \r
-  if(fRunShuffling) {\r
-    // shuffle charges\r
-    random_shuffle( chargeVectorShuffle[0]->begin(), chargeVectorShuffle[0]->end() );\r
-    if(fUseMultiplicity) \r
-      fShuffledBalance->CalculateBalance(gReactionPlane,chargeVectorShuffle);\r
-    else                 \r
-      fShuffledBalance->CalculateBalance(gReactionPlane,chargeVectorShuffle);\r
+  TObjArray* tracksShuffled = new TObjArray;\r
+  tracksShuffled->SetOwner(kTRUE);\r
+\r
+  vector<Short_t> *chargeVector = new vector<Short_t>;   //original charge of accepted tracks \r
+\r
+  for (Int_t i=0; i<tracks->GetEntriesFast(); i++)\r
+  {\r
+    AliVParticle* track = (AliVParticle*) tracks->At(i);\r
+    chargeVector->push_back(track->Charge());\r
+  }  \r
\r
+  random_shuffle(chargeVector->begin(), chargeVector->end());\r
+  \r
+  for(Int_t i = 0; i < tracks->GetEntriesFast(); i++){\r
+    AliVParticle* track = (AliVParticle*) tracks->At(i);\r
+    //==============================correction\r
+    Double_t correction = GetTrackbyTrackCorrectionMatrix(track->Eta(), track->Phi(),track->Pt(), chargeVector->at(i), gCentrality);\r
+    tracksShuffled->Add(new AliBFBasicParticle(track->Eta(), track->Phi(), track->Pt(),chargeVector->at(i), correction));\r
   }\r
-}      \r
+\r
+  delete chargeVector;\r
+   \r
+  return tracksShuffled;\r
+}\r
+\r
 \r
 //________________________________________________________________________\r
 void  AliAnalysisTaskBFPsi::FinishTaskOutput(){\r
   //Printf("END BF");\r
 \r
   if (!fBalance) {\r
-    Printf("ERROR: fBalance not available");\r
+    AliError("fBalance not available");\r
     return;\r
   }  \r
   if(fRunShuffling) {\r
     if (!fShuffledBalance) {\r
-      Printf("ERROR: fShuffledBalance not available");\r
+      AliError("fShuffledBalance not available");\r
       return;\r
     }\r
   }\r