[PWGLF] fix double omega mass calculation (#14232)

Co-authored-by: Francesco Mazzaschi <fmazzasc@alipap1.cern.ch>

Author: fmazzasc

PWGLF/TableProducer/Strangeness/doubleCascTreeCreator.cxx

@@ -92,19 +92,19 @@ struct doubleCascTreeCreator {
   ConfigurableAxis zVtxAxis{"zVtxBins", {100, -20.f, 20.f}, "Binning for the vertex z in cm"};
 
   // binning of (anti)lambda mass QA histograms
-  ConfigurableAxis massOmegaAxis{"massLambdaAxis", {400, o2::constants::physics::MassOmegaMinus - 0.05f, o2::constants::physics::MassOmegaMinus + 0.035}, "binning for the Omega invariant-mass"};
+  ConfigurableAxis massOmegaAxis{"massOmegaAxis", {400, o2::constants::physics::MassOmegaMinus - 0.05f, o2::constants::physics::MassOmegaMinus + 0.05}, "binning for the Omega invariant-mass"};
   ConfigurableAxis massXiAxis{"massXiAxis", {400, o2::constants::physics::MassXiMinus - 0.05f, o2::constants::physics::MassXiMinus + 0.05f}, "binning for the Xi invariant-mass"};
 
   Configurable<float> zVtxMax{"zVtxMax", 10.0f, "maximum z position of the primary vertex"};
   Configurable<float> etaMax{"etaMax", 0.9f, "maximum eta"};
   ConfigurableAxis momAxis{"momAxisFine", {5.e2, 0.f, 5.f}, "momentum axis binning"};
 
   Configurable<float> cascPtMin{"cascPtMin", 1.f, "minimum (anti)casc pT (GeV/c)"};
-  Configurable<float> cascPtMax{"cascPtMax", 4.f, "maximum (anti)casc pT (GeV/c)"};
+  Configurable<float> cascPtMax{"cascPtMax", 5.f, "maximum (anti)casc pT (GeV/c)"};
 
   Configurable<float> minNCrossedRows{"minNCrossedRows", 100, "Minimum number of crossed TPC rows"};
   Configurable<float> minNITSClus{"minNITSClus", 0., "Minimum number of ITS clusters"};
-  Configurable<float> minNTPCClus{"minNTPCClus", 100, "Minimum number of TPC clusters"};
+  Configurable<float> minNTPCClus{"minNTPCClus", 80, "Minimum number of TPC clusters"};
   Configurable<float> maxNSharedTPCClus{"maxNSharedTPCClus", 5, "Maximum number of shared TPC clusters"};
 
   Configurable<double> minCascCosPA{"minCascCosPA", 0.99f, "Minimum cosine of the pointing angle of the cascade"};
@@ -159,8 +159,10 @@ struct doubleCascTreeCreator {
 
     // event QA
     histos.add<TH1>("QA/zVtx", ";#it{z}_{vtx} (cm);Entries", HistType::kTH1F, {zVtxAxis});
-    histos.add<TH2>("QA/massXi", ";#it{p}_{T} (GeV/#it{c});#it{M}(#Lambda + #pi^{-}) (GeV/#it{c}^{2});Entries", HistType::kTH2F, {momAxis, massXiAxis});
-    histos.add<TH2>("QA/massOmega", ";#it{p}_{T} (GeV/#it{c});#it{M}(#Omega + #pi^{-}) (GeV/#it{c}^{2});Entries", HistType::kTH2F, {momAxis, massOmegaAxis});
+    histos.add<TH2>("QA/massXi1", ";#it{p}_{T} (GeV/#it{c});#it{M}(#Lambda + #pi^{-}) (GeV/#it{c}^{2});Entries", HistType::kTH2F, {momAxis, massXiAxis});
+    histos.add<TH2>("QA/massOmega1", ";#it{p}_{T} (GeV/#it{c});#it{M}(#Omega + #pi^{-}) (GeV/#it{c}^{2});Entries", HistType::kTH2F, {momAxis, massOmegaAxis});
+    histos.add<TH2>("QA/massXi2", ";#it{p}_{T} (GeV/#it{c});#it{M}(#Lambda + #pi^{-}) (GeV/#it{c}^{2});Entries", HistType::kTH2F, {momAxis, massXiAxis});
+    histos.add<TH2>("QA/massOmega2", ";#it{p}_{T} (GeV/#it{c});#it{M}(#Omega + #pi^{-}) (GeV/#it{c}^{2});Entries", HistType::kTH2F, {momAxis, massOmegaAxis});
   }
 
   template <class C, class T>
@@ -210,7 +212,7 @@ struct doubleCascTreeCreator {
   };
 
   template <class T>
-  bool doubleOmegaMass(T const&, FullCascades::iterator const& casc1, FullCascades::iterator const& casc2)
+  float doubleOmegaMass(T const&, FullCascades::iterator const& casc1, FullCascades::iterator const& casc2)
   {
     // the fake omega decay is the one with the smaller radius
     auto& fakeOmega = casc1.cascradius() < casc2.cascradius() ? casc1 : casc2;
@@ -237,6 +239,8 @@ struct doubleCascTreeCreator {
       if (!isSelectedCasc(collision, tracks, casc1)) {
         continue;
       }
+      histos.fill(HIST("QA/massXi"), casc1.pt(), casc1.mXi());
+      histos.fill(HIST("QA/massOmega"), casc1.pt(), casc1.mOmega());
       for (auto& casc2 : cascades) {
         if (!isSelectedCasc(collision, tracks, casc2)) {
           continue;