From aae1a933520e71060a0eb4b10cefd4cfe4c8b79b Mon Sep 17 00:00:00 2001
From: Stefanie Mrozinski <stefanie.mrozinski@stud.uni-frankfurt.de>
Date: Tue, 21 Jul 2026 13:09:31 +0200
Subject: [PATCH 1/3] fix histogram booking

---
 PWGEM/PhotonMeson/Tasks/photonhbt.cxx | 23 +++++++++++++++++------
 1 file changed, 17 insertions(+), 6 deletions(-)

diff --git a/PWGEM/PhotonMeson/Tasks/photonhbt.cxx b/PWGEM/PhotonMeson/Tasks/photonhbt.cxx
index 0ae897ca70f..38fc055f6cd 100644
--- a/PWGEM/PhotonMeson/Tasks/photonhbt.cxx
+++ b/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

From 21b7c3fa54f656572f14e1d1513b2f05777d49e5 Mon Sep 17 00:00:00 2001
From: Stefanie Mrozinski <stefanie.mrozinski@stud.uni-frankfurt.de>
Date: Tue, 21 Jul 2026 13:22:48 +0200
Subject: [PATCH 2/3] add missing header

---
 PWGEM/PhotonMeson/Tasks/photonhbt.cxx | 1 +
 1 file changed, 1 insertion(+)

diff --git a/PWGEM/PhotonMeson/Tasks/photonhbt.cxx b/PWGEM/PhotonMeson/Tasks/photonhbt.cxx
index 38fc055f6cd..53f007ad634 100644
--- a/PWGEM/PhotonMeson/Tasks/photonhbt.cxx
+++ b/PWGEM/PhotonMeson/Tasks/photonhbt.cxx
@@ -31,6 +31,7 @@
 #include <DataFormatsParameters/GRPMagField.h>
 #include <Framework/ASoAHelpers.h>
 #include <Framework/AnalysisDataModel.h>
+#include <Framework/AnalysisHelpers.h>
 #include <Framework/AnalysisTask.h>
 #include <Framework/Configurable.h>
 #include <Framework/HistogramRegistry.h>

From 131e1b40fe220421c11dc721cc35b904fe4b7056 Mon Sep 17 00:00:00 2001
From: ALICE Action Bot <alibuild@cern.ch>
Date: Tue, 21 Jul 2026 11:23:36 +0000
Subject: [PATCH 3/3] Please consider the following formatting changes

---
 PWGEM/PhotonMeson/Tasks/photonhbt.cxx | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/PWGEM/PhotonMeson/Tasks/photonhbt.cxx b/PWGEM/PhotonMeson/Tasks/photonhbt.cxx
index 53f007ad634..b621516b429 100644
--- a/PWGEM/PhotonMeson/Tasks/photonhbt.cxx
+++ b/PWGEM/PhotonMeson/Tasks/photonhbt.cxx
@@ -2718,8 +2718,8 @@ struct Photonhbt {
           }
         }
       } // end cfgDoTruthMix
-    }   // end collision loop
-  }     // end runTruthEfficiency
+    } // end collision loop
+  } // end runTruthEfficiency
 
   /*************************************************/
   // PROCESS FUNCTIONS