Fix: fix pair finding in MC

ariedel-cern · ariedel-cern · commit e1b1a76eb93f · 2026-05-06T13:01:19.000+02:00
diff --git a/PWGCF/Femto/Tasks/femtoPairEfficiency.cxx b/PWGCF/Femto/Tasks/femtoPairEfficiency.cxx
@@ -486,8 +486,9 @@ struct FemtoPairEfficiency {
   {
     float mass1 = o2::analysis::femto::utils::getPdgMass(std::abs(TrackSel1.pdgCode.value));
     float mass2 = o2::analysis::femto::utils::getPdgMass(std::abs(TrackSel2.pdgCode.value));
+    bool foundPair = false;
 
-    for (auto const& [p1, p2] : o2::soa::combinations(o2::soa::CombinationsUpperIndexPolicy(tracks, tracks))) {
+    for (auto const& [p1, p2] : o2::soa::combinations(o2::soa::CombinationsStrictlyUpperIndexPolicy(tracks, tracks))) {
 
       bool order1 = checkTrackMC(p1, TrackSel1) && checkTrackMC(p2, TrackSel2) &&
                     std::abs(p1.pdgCode()) == std::abs(TrackSel1.pdgCode.value) &&
@@ -525,9 +526,9 @@ struct FemtoPairEfficiency {
       if (kstar > kStarMax.value) {
         continue;
       }
-      return true;
+      foundPair = true;
     }
-    return false;
+    return foundPair;
   }
 
   template <typename CheckCol, typename CheckTracks>

Original file line number	Diff line number	Diff line change
`@@ -486,8 +486,9 @@ struct FemtoPairEfficiency {`
`486`	`486`	`{`
`487`	`487`	`float mass1 = o2::analysis::femto::utils::getPdgMass(std::abs(TrackSel1.pdgCode.value));`
`488`	`488`	`float mass2 = o2::analysis::femto::utils::getPdgMass(std::abs(TrackSel2.pdgCode.value));`
	`489`	`+ bool foundPair = false;`
`489`	`490`
`490`		`- for (auto const& [p1, p2] : o2::soa::combinations(o2::soa::CombinationsUpperIndexPolicy(tracks, tracks))) {`
	`491`	`+ for (auto const& [p1, p2] : o2::soa::combinations(o2::soa::CombinationsStrictlyUpperIndexPolicy(tracks, tracks))) {`
`491`	`492`
`492`	`493`	`bool order1 = checkTrackMC(p1, TrackSel1) && checkTrackMC(p2, TrackSel2) &&`
`493`	`494`	`std::abs(p1.pdgCode()) == std::abs(TrackSel1.pdgCode.value) &&`
`@@ -525,9 +526,9 @@ struct FemtoPairEfficiency {`
`525`	`526`	`if (kstar > kStarMax.value) {`
`526`	`527`	`continue;`
`527`	`528`	`}`
`528`		`- return true;`
	`529`	`+ foundPair = true;`
`529`	`530`	`}`
`530`		`- return false;`
	`531`	`+ return foundPair;`
`531`	`532`	`}`
`532`	`533`
`533`	`534`	`template <typename CheckCol, typename CheckTracks>`