message: PWGDQ EtaReconstruction Set Secondary mass to photon mass=0
diff: @@ -1646,6 +1646,7 @@ void AliAnalysisTaskEtaReconstruction::UserExec(Option_t* option){
  Lvec1.SetPtEtaPhiM(posAODTrack->Pt(), posAODTrack->Eta(), posAODTrack->Phi(), AliPID::ParticleMass(AliPID::kElectron));
  Lvec2.SetPtEtaPhiM(negAODTrack->Pt(), negAODTrack->Eta(), negAODTrack->Phi(), AliPID::ParticleMass(AliPID::kElectron));
  TLorentzVector LvecM = Lvec1 + Lvec2;
  + LvecM.SetE(sqrt(LvecM.P()*LvecM.P() /* - mass*mass */)); // Set Mass to photon mass = 0
  double mass = LvecM.M();
  if (fDoMassCut == kTRUE && mass >= fMassCutSecondaries ) continue; // mass cut for primaries
  double pairpt = LvecM.Pt();
  