[PWGLF] Added eventmixing histogram (#12280)

Author: sangwoo184

PWGLF/Tasks/Resonances/f0980pbpbanalysis.cxx

@@ -548,11 +548,11 @@ struct F0980pbpbanalysis {
 
           if (trk1.sign() * trk2.sign() < 0) {
             histos.fill(HIST("hInvMass_f0980_MixedUS_EPA"), recoPtl.M(), recoPtl.Pt(), centrality, relPhiMix);
-          } else if (trk1.sign() > 0 && trk2.sign() > 0) {
-            histos.fill(HIST("hInvMass_f0980_MixedLSpp_EPA"), recoPtl.M(), recoPtl.Pt(), centrality, relPhiMix);
-          } else if (trk1.sign() < 0 && trk2.sign() < 0) {
-            histos.fill(HIST("hInvMass_f0980_MixedLSmm_EPA"), recoPtl.M(), recoPtl.Pt(), centrality, relPhiMix);
-          }
+          } // else if (trk1.sign() > 0 && trk2.sign() > 0) {
+          //   histos.fill(HIST("hInvMass_f0980_MixedLSpp_EPA"), recoPtl.M(), recoPtl.Pt(), centrality, relPhiMix);
+          // } else if (trk1.sign() < 0 && trk2.sign() < 0) {
+          //   histos.fill(HIST("hInvMass_f0980_MixedLSmm_EPA"), recoPtl.M(), recoPtl.Pt(), centrality, relPhiMix);
+          // }
         }
       }
       // for (auto& [trk1, trk2] : o2::soa::combinations(o2::soa::CombinationsFullIndexPolicy(t1, t2))) {
@@ -623,6 +623,8 @@ struct F0980pbpbanalysis {
                {HistType::kTHnSparseF, {massAxis, ptAxis, centAxis, epAxis}});
     histos.add("hInvMass_f0980_USRot_EPA", "unlike invariant mass Rotation",
                {HistType::kTHnSparseF, {massAxis, ptAxis, centAxis, epAxis}});
+    histos.add("hInvMass_f0980_MixedUS_EPA", "unlike invariant mass EventMixing",
+               {HistType::kTHnSparseF, {massAxis, ptAxis, centAxis, epAxis}});
     //    if (doprocessMCLight) {
     //      histos.add("MCL/hpT_f0980_GEN", "generated f0 signals", HistType::kTH1F, {qaPtAxis});
     //      histos.add("MCL/hpT_f0980_REC", "reconstructed f0 signals", HistType::kTH3F, {massAxis, qaPtAxis, centAxis});