From 7461c86fb6c4173c026e27c65d9d9480d320e98b Mon Sep 17 00:00:00 2001
From: Pritam Chakraborty <47203359+prchakra@users.noreply.github.com>
Date: Mon, 30 Mar 2026 10:04:33 +0200
Subject: [PATCH] FemtoUniverse: Add approx. fracTPCsCls in mixed-event pairs

---
 ...emtoUniversePairTaskTrackTrackSpherHarMultKtExtended.cxx | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/PWGCF/FemtoUniverse/Tasks/femtoUniversePairTaskTrackTrackSpherHarMultKtExtended.cxx b/PWGCF/FemtoUniverse/Tasks/femtoUniversePairTaskTrackTrackSpherHarMultKtExtended.cxx
index 7d20486a76a..2955e47a58c 100644
--- a/PWGCF/FemtoUniverse/Tasks/femtoUniversePairTaskTrackTrackSpherHarMultKtExtended.cxx
+++ b/PWGCF/FemtoUniverse/Tasks/femtoUniversePairTaskTrackTrackSpherHarMultKtExtended.cxx
@@ -968,6 +968,12 @@ struct femtoUniversePairTaskTrackTrackSpherHarMultKtExtended {
 
       if (kT < firstRealElement || kT > lastElement)
         continue;
+
+      float pairFractionTPCsCls = static_cast<float>((p1.tpcNClsShared() + p2.tpcNClsShared())) / static_cast<float>((p1.tpcNClsFound() + p2.tpcNClsFound()));
+      if (pairFractionTPCsCls > twotracksconfigs.confPairFracSharedTPCcls.value) {
+        continue;
+      }
+
       double rand;
       rand = randgen->Rndm();
       auto part1 = p1;