From 07064e7ed09f3c3e3c4f7c2a5e7cd088f144949d Mon Sep 17 00:00:00 2001
From: abmodak <67369858+abmodak@users.noreply.github.com>
Date: Mon, 11 Aug 2025 05:51:28 +0200
Subject: [PATCH] Add configurable for split MC reco collisions

---
 PWGLF/Tasks/GlobalEventProperties/heavyionMultiplicity.cxx | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/PWGLF/Tasks/GlobalEventProperties/heavyionMultiplicity.cxx b/PWGLF/Tasks/GlobalEventProperties/heavyionMultiplicity.cxx
index b91db8d09e0..3d0e34adb1c 100644
--- a/PWGLF/Tasks/GlobalEventProperties/heavyionMultiplicity.cxx
+++ b/PWGLF/Tasks/GlobalEventProperties/heavyionMultiplicity.cxx
@@ -164,6 +164,7 @@ struct HeavyionMultiplicity {
   Configurable<bool> isApplyCentFT0M{"isApplyCentFT0M", false, "Centrality based on FT0A + FT0C"};
   Configurable<bool> isApplyCentNGlobal{"isApplyCentNGlobal", false, "Centrality based on global tracks"};
   Configurable<bool> isApplyCentMFT{"isApplyCentMFT", false, "Centrality based on MFT tracks"};
+  Configurable<bool> isApplySplitRecCol{"isApplySplitRecCol", false, "Split MC reco collisions"};
 
   void init(InitContext const&)
   {
@@ -434,6 +435,11 @@ struct HeavyionMultiplicity {
 
   void processMonteCarlo(CollisionMCTrueTable::iterator const&, CollisionMCRecTable const& RecCols, TrackMCTrueTable const& GenParticles, FilTrackMCRecTable const& RecTracks)
   {
+
+    if (isApplySplitRecCol && (RecCols.size() == 0 || RecCols.size() > 1)) {
+      return;
+    }
+
     for (const auto& RecCol : RecCols) {
       if (!isEventSelected(RecCol)) {
         continue;