[PWGCF] use amplitude as correlation weight (#13175)

Author: Luzhiyongg

PWGCF/TwoParticleCorrelations/Tasks/longRangeDihadronCor.cxx

@@ -577,22 +577,22 @@ struct LongRangeDihadronCor {
         if (system == SameEvent) {
           if (corType == kFT0A) {
             registry.fill(HIST("Assoc_amp_same_TPC_FT0A"), chanelid, ampl);
-            sameTpcFt0a->getPairHist()->Fill(step, fSampleIndex, posZ, track1.pt(), track1.pt(), deltaPhi, deltaEta, eventWeight * triggerWeight);
-            registry.fill(HIST("deltaEta_deltaPhi_same_TPC_FT0A"), deltaPhi, deltaEta, eventWeight * triggerWeight);
+            sameTpcFt0a->getPairHist()->Fill(step, fSampleIndex, posZ, track1.pt(), track1.pt(), deltaPhi, deltaEta, ampl * eventWeight * triggerWeight);
+            registry.fill(HIST("deltaEta_deltaPhi_same_TPC_FT0A"), deltaPhi, deltaEta, ampl * eventWeight * triggerWeight);
           } else if (corType == kFT0C) {
             registry.fill(HIST("Assoc_amp_same_TPC_FT0C"), chanelid, ampl);
-            sameTpcFt0c->getPairHist()->Fill(step, fSampleIndex, posZ, track1.pt(), track1.pt(), deltaPhi, deltaEta, eventWeight * triggerWeight);
-            registry.fill(HIST("deltaEta_deltaPhi_same_TPC_FT0C"), deltaPhi, deltaEta, eventWeight * triggerWeight);
+            sameTpcFt0c->getPairHist()->Fill(step, fSampleIndex, posZ, track1.pt(), track1.pt(), deltaPhi, deltaEta, ampl * eventWeight * triggerWeight);
+            registry.fill(HIST("deltaEta_deltaPhi_same_TPC_FT0C"), deltaPhi, deltaEta, ampl * eventWeight * triggerWeight);
           }
         } else if (system == MixedEvent) {
           if (corType == kFT0A) {
             registry.fill(HIST("Assoc_amp_mixed_TPC_FT0A"), chanelid, ampl);
-            mixedTpcFt0a->getPairHist()->Fill(step, fSampleIndex, posZ, track1.pt(), track1.pt(), deltaPhi, deltaEta, eventWeight * triggerWeight);
-            registry.fill(HIST("deltaEta_deltaPhi_mixed_TPC_FT0A"), deltaPhi, deltaEta, eventWeight * triggerWeight);
+            mixedTpcFt0a->getPairHist()->Fill(step, fSampleIndex, posZ, track1.pt(), track1.pt(), deltaPhi, deltaEta, ampl * eventWeight * triggerWeight);
+            registry.fill(HIST("deltaEta_deltaPhi_mixed_TPC_FT0A"), deltaPhi, deltaEta, ampl * eventWeight * triggerWeight);
           } else if (corType == kFT0C) {
             registry.fill(HIST("Assoc_amp_mixed_TPC_FT0C"), chanelid, ampl);
-            mixedTpcFt0c->getPairHist()->Fill(step, fSampleIndex, posZ, track1.pt(), track1.pt(), deltaPhi, deltaEta, eventWeight * triggerWeight);
-            registry.fill(HIST("deltaEta_deltaPhi_mixed_TPC_FT0C"), deltaPhi, deltaEta, eventWeight * triggerWeight);
+            mixedTpcFt0c->getPairHist()->Fill(step, fSampleIndex, posZ, track1.pt(), track1.pt(), deltaPhi, deltaEta, ampl * eventWeight * triggerWeight);
+            registry.fill(HIST("deltaEta_deltaPhi_mixed_TPC_FT0C"), deltaPhi, deltaEta, ampl * eventWeight * triggerWeight);
           }
         }
       }
@@ -626,11 +626,11 @@ struct LongRangeDihadronCor {
         float deltaEta = etaA - etaC;
         // fill the right sparse and histograms
         if (system == SameEvent) {
-          sameFt0aFt0c->getPairHist()->Fill(step, fSampleIndex, posZ, 0., 0., deltaPhi, deltaEta, eventWeight * triggerWeight);
-          registry.fill(HIST("deltaEta_deltaPhi_same_FT0A_FT0C"), deltaPhi, deltaEta, eventWeight * triggerWeight);
+          sameFt0aFt0c->getPairHist()->Fill(step, fSampleIndex, posZ, 0., 0., deltaPhi, deltaEta, amplA * amplC * eventWeight * triggerWeight);
+          registry.fill(HIST("deltaEta_deltaPhi_same_FT0A_FT0C"), deltaPhi, deltaEta, amplA * amplC * eventWeight * triggerWeight);
         } else if (system == MixedEvent) {
-          mixedFt0aFt0c->getPairHist()->Fill(step, fSampleIndex, posZ, 0., 0., deltaPhi, deltaEta, eventWeight * triggerWeight);
-          registry.fill(HIST("deltaEta_deltaPhi_mixed_FT0A_FT0C"), deltaPhi, deltaEta, eventWeight * triggerWeight);
+          mixedFt0aFt0c->getPairHist()->Fill(step, fSampleIndex, posZ, 0., 0., deltaPhi, deltaEta, amplA * amplC * eventWeight * triggerWeight);
+          registry.fill(HIST("deltaEta_deltaPhi_mixed_FT0A_FT0C"), deltaPhi, deltaEta, amplA * amplC * eventWeight * triggerWeight);
         }
       }
     }