[PWGLF] lambdaTwoPartPolarization.cxx: fix bug for event mixing (#17491)

Co-authored-by: ALICE Action Bot <alibuild@cern.ch>

Author: jikim1290

PWGLF/Tasks/Strangeness/lambdaTwoPartPolarization.cxx

@@ -370,8 +370,10 @@ struct LfLambdaTwoPartPolarization {
           aLambdaTag = 1;
         }
 
-        if (postrack_v01.globalIndex() == trk.globalIndex() || negtrack_v01.globalIndex() == trk.globalIndex()) {
-          continue;
+        if (doprocessDataSame) {
+          if (postrack_v01.globalIndex() == trk.globalIndex() || negtrack_v01.globalIndex() == trk.globalIndex()) {
+            continue;
+          }
         }
 
         if (LambdaTag == aLambdaTag) {
@@ -536,12 +538,11 @@ struct LfLambdaTwoPartPolarization {
                              TrackCandidates const& tracks, aod::V0Datas const& V0s,
                              aod::BCsWithTimestamps const&)
   {
+    centrality = collision.centFT0M();
     if (cfgCentEst == kFT0C) {
       centrality = collision.centFT0C();
     } else if (cfgCentEst == kFT0M) {
       centrality = collision.centFT0M();
-    } else {
-      centrality = collision.centFT0M();
     }
     if (!eventSelected(collision) && cfgEvtSel) {
       return;
@@ -568,12 +569,11 @@ struct LfLambdaTwoPartPolarization {
                        TrackCandidates const& /*tracks*/, aod::V0Datas const& V0s,
                        aod::BCsWithTimestamps const&)
   {
+    centrality = collision.centFT0M();
     if (cfgCentEst == kFT0C) {
       centrality = collision.centFT0C();
     } else if (cfgCentEst == kFT0M) {
       centrality = collision.centFT0M();
-    } else {
-      centrality = collision.centFT0M();
     }
     if (!eventSelected(collision) && cfgEvtSel) {
       return;