message: mod AliAnalyTaskGH to select only Pi0s
diff: @@ -822,7 +822,7 @@ Int_t AliAnalysisTaskGammaHadron::CorrelatePi0AndTrack(AliParticleContainer* tra
  Int_t nAccClusters = 0;
  Int_t nAccPi0Clusters = 0;
  Double_t Pi0Mass = 0.13487;
  - Double_t Pi0Window = 0.03; //can eventually modulate this based on pT of Pi0 candidate!
  + Double_t Pi0Window = 0.02;//0.03 //can eventually modulate this based on pT of Pi0 candidate!
  Double_t EffWeight_Gamma;
  Double_t EffWeight_Hadron;
  Double_t Weight; //weight to normalize mixed and same event distributions individually
  @@ -907,11 +907,13 @@ Int_t AliAnalysisTaskGammaHadron::CorrelatePi0AndTrack(AliParticleContainer* tra
  TLorentzVector CaloClusterVec2;
  TLorentzVector CaloClusterVecpi0;
  //old framework cluster2->GetMomentum(CaloClusterVec2, fVertex);
  - clusters->GetMomentum(CaloClusterVec,cluster2);
  + clusters->GetMomentum(CaloClusterVec2,cluster2); /// Vec+=2 2.1.17
  if(cluster2->E()>2 && cluster->E()>2)
  {
  CaloClusterVecpi0=CaloClusterVec+CaloClusterVec2;
  + if((CaloClusterVecpi0.M()<Pi0Mass-Pi0Window) || (CaloClusterVecpi0.M()>Pi0Mass+Pi0Window)) continue; /// 2.1.17
  +
  //here I don't really know what to do in your case
  //eff of pi0? or eff of gamma? or some mix up of the two ?
  