[PWGLF] Change in hStrangeCorrelation.cxx (#8444)

Co-authored-by: Lucia Anna Tarasovicova <lucia.anna.husova@cern.ch>

Author: lhusova

PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx

@@ -20,6 +20,8 @@
 /// \author David Dobrigkeit Chinellato (david.dobrigkeit.chinellato@cern.ch)
 /// \author Zhongbao Yin (Zhong-Bao.Yin@cern.ch)
 
+#include <string>
+#include <vector>
 #include "Framework/runDataProcessing.h"
 #include "Framework/AnalysisTask.h"
 #include "Common/DataModel/TrackSelectionTables.h"
@@ -33,8 +35,6 @@
 #include "Common/DataModel/Centrality.h"
 #include "Framework/StaticFor.h"
 #include "CCDB/BasicCCDBManager.h"
-#include <string>
-#include <vector>
 
 using namespace o2;
 using namespace o2::constants::math;
@@ -1451,9 +1451,16 @@ struct correlateStrangeness {
         continue;
       }
       if (abs(mcParticle.pdgCode()) == 211 || abs(mcParticle.pdgCode()) == 321 || abs(mcParticle.pdgCode()) == 2212 || abs(mcParticle.pdgCode()) == 11 || abs(mcParticle.pdgCode()) == 13) {
+        Int_t charge = 0;
+        if (mcParticle.pdgCode() < 0)
+          charge = -1;
+        if (mcParticle.pdgCode() > 0)
+          charge = 1;
         if (!doTriggPhysicalPrimary || mcParticle.isPhysicalPrimary()) {
-          triggerIndices.emplace_back(iteratorNum);
-          histos.fill(HIST("ClosureTest/hTrigger"), gpt, geta, bestCollisionFT0Mpercentile);
+          if ((triggerParticleCharge > 0 && charge > 0) || (triggerParticleCharge < 0 && charge < 0) || triggerParticleCharge == 0) {
+            triggerIndices.emplace_back(iteratorNum);
+            histos.fill(HIST("ClosureTest/hTrigger"), gpt, geta, bestCollisionFT0Mpercentile);
+          }
         }
       }
       if (!doAssocPhysicalPrimary || mcParticle.isPhysicalPrimary()) {