PWGEM/Dilepton: fix isBestMatch for global muons

dsekihat · dsekihat · commit 881c5a4c125c · 2026-01-16T20:34:48.000+01:00
diff --git a/PWGEM/Dilepton/Utils/EMTrackUtilities.h b/PWGEM/Dilepton/Utils/EMTrackUtilities.h
@@ -138,7 +138,10 @@ bool isBestMatch(TTrack const& track, TCut const& cut, TTracks const& tracks)
         }
       }
     }
-    if (map_chi2MCHMFT.begin()->first == track.globalIndex()) { // search for minimum matching-chi2
+
+    auto it = std::min_element(map_chi2MCHMFT.begin(), map_chi2MCHMFT.end(), [](decltype(map_chi2MCHMFT)::value_type& l, decltype(map_chi2MCHMFT)::value_type& r) -> bool { return l.second < r.second; }); // search for minimum matching-chi2
+
+    if (it->first == track.globalIndex()) {
       map_chi2MCHMFT.clear();
       return true;
     } else {

Original file line number	Diff line number	Diff line change
`@@ -138,7 +138,10 @@ bool isBestMatch(TTrack const& track, TCut const& cut, TTracks const& tracks)`
`138`	`138`	`}`
`139`	`139`	`}`
`140`	`140`	`}`
`141`		`- if (map_chi2MCHMFT.begin()->first == track.globalIndex()) { // search for minimum matching-chi2`
	`141`	`+`
	`142`	`+ auto it = std::min_element(map_chi2MCHMFT.begin(), map_chi2MCHMFT.end(), [](decltype(map_chi2MCHMFT)::value_type& l, decltype(map_chi2MCHMFT)::value_type& r) -> bool { return l.second < r.second; }); // search for minimum matching-chi2`
	`143`	`+`
	`144`	`+ if (it->first == track.globalIndex()) {`
`142`	`145`	`map_chi2MCHMFT.clear();`
`143`	`146`	`return true;`
`144`	`147`	`} else {`