AliAnalysisTaskESDfilter *AddTaskESDFilter(Bool_t useKineFilter=kTRUE, 
                                           Bool_t writeMuonAOD=kFALSE,
                                           Bool_t writeDimuonAOD=kFALSE,
					   Bool_t usePhysicsSelection=kFALSE)
{
// Creates a filter task and adds it to the analysis manager.

   // Get the pointer to the existing analysis manager via the static access method.
   //==============================================================================
   AliAnalysisManager *mgr = AliAnalysisManager::GetAnalysisManager();
   if (!mgr) {
      ::Error("AddTaskESDFilter", "No analysis manager to connect to.");
      return NULL;
   }   
   
   // This task requires an ESD input handler and an AOD output handler.
   // Check this using the analysis manager.
   //===============================================================================
   TString type = mgr->GetInputEventHandler()->GetDataType();
   if (!type.Contains("ESD")) {
      ::Error("AddTaskESDFilter", "ESD filtering task needs the manager to have an ESD input handler.");
      return NULL;
   }   
   // Check if AOD output handler exist.
   AliAODHandler *aod_h = (AliAODHandler*)mgr->GetOutputEventHandler();
   if (!aod_h) {
      ::Error("AddTaskESDFilter", "ESD filtering task needs the manager to have an AOD output handler.");
      return NULL;
   }
   // Check if MC handler is connected in case kine filter requested
   AliMCEventHandler *mcH = (AliMCEventHandler*)mgr->GetMCtruthEventHandler();
   if (!mcH && useKineFilter) {
      ::Error("AddTaskESDFilter", "No MC handler connected while kine filtering requested");
      return NULL;
   }   
   
   // Create the task, add it to the manager and configure it.
   //===========================================================================   
   // Barrel tracks filter
   AliAnalysisTaskESDfilter *esdfilter = new AliAnalysisTaskESDfilter("ESD Filter");
   mgr->AddTask(esdfilter);
   // Muons
   //   AliAnalysisTaskESDMuonFilter *esdmuonfilter = new AliAnalysisTaskESDMuonFilter("ESD Muon Filter");
   //   mgr->AddTask(esdmuonfilter);
   if(usePhysicsSelection){
     esdfilter->SelectCollisionCandidates(AliVEvent::kAny);
     //     esdmuonfilter->SelectCollisionCandidates(AliVEvent::kAny);
   }  

   // Filtering of MC particles (decays conversions etc)
   // this task has to go AFTER all other filter tasks
   // since it fills the AODMC array with all
   // selected MC Particles, only this way we have the 
   // AODMCparticle information available for following tasks
   AliAnalysisTaskMCParticleFilter *kinefilter = 0;
   if (useKineFilter) {
      kinefilter = new AliAnalysisTaskMCParticleFilter("Particle Kine Filter");
      if(usePhysicsSelection)kinefilter->SelectCollisionCandidates(AliVEvent::kAny);
      mgr->AddTask(kinefilter);
   }   

   // Cuts on primary tracks
   AliESDtrackCuts* esdTrackCutsL = AliESDtrackCuts::GetStandardTPCOnlyTrackCuts();

   // ITS stand-alone tracks
   AliESDtrackCuts* esdTrackCutsITSsa = new AliESDtrackCuts("ITS stand-alone Track Cuts", "ESD Track Cuts");
   esdTrackCutsITSsa->SetRequireITSStandAlone(kTRUE);

   // Pixel OR necessary for the electrons
   AliESDtrackCuts *itsStrong = new AliESDtrackCuts("ITSorSPD", "pixel requirement for ITS");
   itsStrong->SetClusterRequirementITS(AliESDtrackCuts::kSPD, AliESDtrackCuts::kAny);


   // PID for the electrons
   AliESDpidCuts *electronID = new AliESDpidCuts("Electrons", "Electron PID cuts");
   electronID->SetTPCnSigmaCut(AliPID::kElectron, 3.);

   // tighter cuts on primary particles for high pT tracks
   // take the standard cuts, which include already 
   // ITSrefit and use only primaries...
   AliESDtrackCuts* esdTrackCutsH =  AliESDtrackCuts::GetStandardITSTPCTrackCuts2009(kTRUE);
   esdTrackCutsH->SetName("StandardFromAliESDTrackCuts");


   // these are needed for older MC 
   /*
   AliESDtrackCuts* esdTrackCutsH1 = new AliESDtrackCuts("OldStandardTrackCuts+ITSRefit", "High pT ESD Track Cuts");
   esdTrackCutsH1->SetMinNClustersTPC(50);
   esdTrackCutsH1->SetMaxChi2PerClusterTPC(3.5);
   esdTrackCutsH1->SetRequireTPCRefit(kTRUE);
   esdTrackCutsH1->SetMaxDCAToVertexXY(2.4);
   esdTrackCutsH1->SetMaxDCAToVertexZ(3.2);
   esdTrackCutsH1->SetDCAToVertex2D(kTRUE);
   esdTrackCutsH1->SetRequireSigmaToVertex(kFALSE);
   esdTrackCutsH1->SetAcceptKinkDaughters(kFALSE);
   esdTrackCutsH1->SetRequireITSRefit(kTRUE); // additional cut 
   */
   AliESDtrackCuts* esdTrackCutsH1 = AliESDtrackCuts::GetStandardITSTPCTrackCuts2009();
   esdTrackCutsH1->SetName("StandardFromAliESDTrackCutsMaxRelPt");
   esdTrackCutsH1->SetMaxRel1PtUncertainty(0.08); // new 


   AliESDtrackCuts* esdTrackCutsH2 = AliESDtrackCuts::GetStandardITSTPCTrackCuts2009();
   esdTrackCutsH2->SetName("StandardFromAliESDTrackCutsNoSPDRequirement");
   esdTrackCutsH2->SetClusterRequirementITS(AliESDtrackCuts::kSPD, AliESDtrackCuts::kOff);
 

   // Compose the filter
   AliAnalysisFilter* trackFilter = new AliAnalysisFilter("trackFilter");
   // 1
   trackFilter->AddCuts(esdTrackCutsL);
   // 2
   trackFilter->AddCuts(esdTrackCutsITSsa);
   // 4
   trackFilter->AddCuts(itsStrong);
   itsStrong->SetFilterMask(1);        // AND with Standard track cuts 
   // 8
   trackFilter->AddCuts(electronID);
   electronID->SetFilterMask(4);       // AND with Pixel Cuts
   // 16
   trackFilter->AddCuts(esdTrackCutsH);
   // 32
   trackFilter->AddCuts(esdTrackCutsH1);
   // 64
   trackFilter->AddCuts(esdTrackCutsH2);
 
   // Filter with cuts on V0s
   AliESDv0Cuts*   esdV0Cuts = new AliESDv0Cuts("Standard V0 Cuts pp", "ESD V0 Cuts");
   esdV0Cuts->SetMinRadius(0.2);
   esdV0Cuts->SetMaxRadius(200);
   esdV0Cuts->SetMinDcaPosToVertex(0.05);
   esdV0Cuts->SetMinDcaNegToVertex(0.05);
   esdV0Cuts->SetMaxDcaV0Daughters(1.5);
   esdV0Cuts->SetMinCosinePointingAngle(0.99);
   AliAnalysisFilter* v0Filter = new AliAnalysisFilter("v0Filter");
   //  v0Filter->AddCuts(esdV0Cuts);

   esdfilter->SetTrackFilter(trackFilter);
   //  esdfilter->SetV0Filter(v0Filter);

   // Enable writing of Muon AODs
   //   esdmuonfilter->SetWriteMuonAOD(writeMuonAOD);
   
   // Enable writing of Dimuon AODs
   //   esdmuonfilter->SetWriteDimuonAOD(writeDimuonAOD);
 
   // Create ONLY the output containers for the data produced by the task.
   // Get and connect other common input/output containers via the manager as below
   //==============================================================================

   mgr->ConnectInput  (esdfilter,  0, mgr->GetCommonInputContainer());
   mgr->ConnectOutput (esdfilter,  0, mgr->GetCommonOutputContainer());
   

   //   mgr->ConnectInput  (esdmuonfilter, 0, mgr->GetCommonInputContainer());
   if (useKineFilter) {
      mgr->ConnectInput  (kinefilter,  0, mgr->GetCommonInputContainer());
      mgr->ConnectOutput (kinefilter,  0, mgr->GetCommonOutputContainer());
      AliAnalysisDataContainer *coutputEx = mgr->CreateContainer("cFilterList", TList::Class(),
								   AliAnalysisManager::kOutputContainer,"pyxsec_hists.root");
      mgr->ConnectOutput (kinefilter,  1,coutputEx);
   }   
   return esdfilter;
 }