message: add QA histogram for missing signal
diff: @@ -280,9 +280,11 @@ void AliAnalysisTaskXi1530::UserCreateOutputObjects() {
  if (IsHighMult) {
  fHistos->CreateTH1("hMult_QA", "", 100, 0, 0.1, "s");
  fHistos->CreateTH1("hMult_QA_onlyMult", "", 100, 0, 0.1, "s");
  + fHistos->CreateTH1("hMult_SkippedDataQA", "", 100, 0, 0.1, "s");
  } else {
  fHistos->CreateTH1("hMult_QA", "", 1000, 0, 100, "s");
  fHistos->CreateTH1("hMult_QA_onlyMult", "", 1000, 0, 100, "s");
  + fHistos->CreateTH1("hMult_SkippedDataQA", "", 100, 0, 100, "s");
  }
  fHistos->CreateTH2("hPhiEta", "", 180, 0, 2 * pi, 40, -2, 2);
  // T P C P I D
  @@ -1912,6 +1914,9 @@ void AliAnalysisTaskXi1530::FillTracks() {
  }
  }
  } // mix loop
  + else { // Count how many signals we lost due to the event cut
  + fHistos->FillTH1("hMult_SkippedDataQA", (double)fCent);
  + }
  }
  void AliAnalysisTaskXi1530::FillTracksAOD() {
  AliVTrack* track1; // charged track, pion
  @@ -2489,6 +2494,9 @@ void AliAnalysisTaskXi1530::FillTracksAOD() {
  }
  }
  } // mix loop
  + else { // Count how many signals we lost due to the event cut
  + fHistos->FillTH1("hMult_SkippedDataQA", (double)fCent);
  + }
  }
  void AliAnalysisTaskXi1530::Terminate(Option_t*) {}
  