message: Add event separation identifier
diff: @@ -2178,6 +2178,7 @@ void AliAnalysisTaskStrEffStudy::UserExec(Option_t *)
  }
  if (!lTrackOfInterest.empty()) {
  + bool lNewEvent = true;
  fTreeHyp3BodyVarMagneticField = b;
  fTreeHyp3BodyVarEventId++;
  fTreeHyp3BodyVarPVt = lTrackOfInterest.back().mother->T();
  @@ -2225,6 +2226,7 @@ void AliAnalysisTaskStrEffStudy::UserExec(Option_t *)
  }
  TParticle* lHyperTriton = lTrackOfInterest[iTrack].mother;
  +
  fTreeHyp3BodyVarTruePx = lHyperTriton->Px();
  fTreeHyp3BodyVarTruePy = lHyperTriton->Py();
  fTreeHyp3BodyVarTruePz = lHyperTriton->Pz();
  @@ -2236,6 +2238,10 @@ void AliAnalysisTaskStrEffStudy::UserExec(Option_t *)
  fTreeHyp3BodyVarDecayT = prong->T();
  fTreeHyp3BodyVarMotherId = lTrackOfInterest[zTrack].motherId;
  + if (lNewEvent) {
  + fTreeHyp3BodyVarMotherId *= -1;
  + lNewEvent = false;
  + }
  fTreeHyperTriton3Body->Fill();
  }
  }
  