fix histogram booking

Author: Stefanie Mrozinski

PWGEM/PhotonMeson/Tasks/photonhbt.cxx

@@ -1359,12 +1359,23 @@ struct Photonhbt {
     float qside_lcms = q3_lcms.Dot(uv_side);
     float qlong_lcms = q3_lcms.Dot(uv_long);
     if (hbtanalysis.cfgDo3D) {
-      fRegistryPairMC.fill(HIST("Pair/same/MC/NoLabel/CF_3D"), std::fabs(qout_lcms), std::fabs(qside_lcms), std::fabs(qlong_lcms), kt);
-      if (hbtanalysis.cfgDo2D) {
-        fRegistryPairMC.fill(HIST("Pair/same/MC/NoLabel/CF_2D"), std::fabs(qout_lcms), std::fabs(qinv), kt);
+      if constexpr (ev_id == 0) {
+        fRegistryCF.fill(HIST("Pair/same/CF_3D"), std::fabs(qout_lcms), std::fabs(qside_lcms), std::fabs(qlong_lcms), kt, weight);
+        if (hbtanalysis.cfgDo2D) {
+          fRegistryCF.fill(HIST("Pair/same/CF_2D"), std::fabs(qout_lcms), std::fabs(qinv), kt, weight);
+        }
+      } else {
+        fRegistryCF.fill(HIST("Pair/mix/CF_3D"), std::fabs(qout_lcms), std::fabs(qside_lcms), std::fabs(qlong_lcms), kt, weight);
+        if (hbtanalysis.cfgDo2D) {
+          fRegistryCF.fill(HIST("Pair/mix/CF_2D"), std::fabs(qout_lcms), std::fabs(qinv), kt, weight);
+        }
       }
     } else {
-      fRegistryPairMC.fill(HIST("Pair/same/MC/NoLabel/CF_1D"), hbtanalysis.cfgUseLCMS ? qabs_lcms : qinv, kt);
+      if constexpr (ev_id == 0) {
+        fRegistryCF.fill(HIST("Pair/same/CF_1D"), hbtanalysis.cfgUseLCMS ? qabs_lcms : qinv, kt, weight);
+      } else {
+        fRegistryCF.fill(HIST("Pair/mix/CF_1D"), hbtanalysis.cfgUseLCMS ? qabs_lcms : qinv, kt, weight);
+      }
     }
     float deta_pair = v1.Eta() - v2.Eta();
     float dphi_pair = v1.Phi() - v2.Phi();
@@ -2706,8 +2717,8 @@ struct Photonhbt {
           }
         }
       } // end cfgDoTruthMix
-    } // end collision loop
-  } // end runTruthEfficiency
+    }   // end collision loop
+  }     // end runTruthEfficiency
 
   /*************************************************/
   // PROCESS FUNCTIONS