From c50bb732e6af8c3928a26944f8b4a3a78e8c5e3c Mon Sep 17 00:00:00 2001
From: Preet Pati <preet@preet-6.local>
Date: Tue, 10 Feb 2026 20:20:17 +0100
Subject: [PATCH 1/2] Added switch for PID exclusion criteria

---
 PWGCF/TwoParticleCorrelations/Tasks/pidDiHadron.cxx | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/PWGCF/TwoParticleCorrelations/Tasks/pidDiHadron.cxx b/PWGCF/TwoParticleCorrelations/Tasks/pidDiHadron.cxx
index 40e73e8ee0e..97b0d969358 100644
--- a/PWGCF/TwoParticleCorrelations/Tasks/pidDiHadron.cxx
+++ b/PWGCF/TwoParticleCorrelations/Tasks/pidDiHadron.cxx
@@ -119,6 +119,7 @@ struct PidDiHadron {
   O2_DEFINE_CONFIGURABLE(cfgPIDParticle, int, 0, "1 = pion, 2 = kaon, 3 = proton, 4 = kshort, 5 = lambda, 6 = phi, 0 for no PID")
   O2_DEFINE_CONFIGURABLE(cfgGetNsigmaQA, bool, true, "Get QA histograms for selection of pions, kaons, and protons")
   O2_DEFINE_CONFIGURABLE(cfgUseAntiLambda, bool, true, "Use AntiLambda candidates for analysis")
+  O2_DEFINE_CONFIGURABLE(cfgPIDUseRejection, bool, true, "Turn off and on the exclusion criteria for PID determination")
 
   struct : ConfigurableGroup {
     O2_DEFINE_CONFIGURABLE(cfgMultCentHighCutFunction, std::string, "[0] + [1]*x + [2]*x*x + [3]*x*x*x + [4]*x*x*x*x + 10.*([5] + [6]*x + [7]*x*x + [8]*x*x*x + [9]*x*x*x*x)", "Functional for multiplicity correlation cut");
@@ -183,7 +184,7 @@ struct PidDiHadron {
 
   // make the filters and cuts.
   Filter collisionFilter = (nabs(aod::collision::posZ) < cfgCutVertex);
-  Filter trackFilter = (nabs(aod::track::eta) < cfgCutEta) && (aod::track::pt > cfgCutPtPOIMin) && (aod::track::pt < cfgCutPtPOIMax) && ((requireGlobalTrackInFilter()) || (aod::track::isGlobalTrackSDD == (uint8_t) true)) && (aod::track::tpcChi2NCl < cfgCutChi2prTPCcls) && (nabs(aod::track::dcaZ) < cfgCutDCAz);
+  Filter trackFilter = (nabs(aod::track::eta) < cfgCutEta) && (aod::track::pt > cfgCutPtPOIMin) && (aod::track::pt < cfgCutPtPOIMax) && ((requireGlobalTrackInFilter()) || (aod::track::isGlobalTrackSDD == (uint8_t)true)) && (aod::track::tpcChi2NCl < cfgCutChi2prTPCcls) && (nabs(aod::track::dcaZ) < cfgCutDCAz);
 
   using FilteredCollisions = soa::Filtered<soa::Join<aod::Collisions, aod::EvSel, aod::CentFT0Cs, aod::CentFT0CVariant1s, aod::CentFT0Ms, aod::CentFV0As, aod::Mults>>;
   using FilteredTracks = soa::Filtered<soa::Join<aod::Tracks, aod::TrackSelection, aod::TracksExtra, aod::TracksDCA, aod::pidTPCFullPi, aod::pidTPCFullKa, aod::pidTPCFullPr, aod::pidTOFbeta, aod::pidTOFFullPi, aod::pidTOFFullKa, aod::pidTOFFullPr>>;
@@ -671,7 +672,7 @@ struct PidDiHadron {
       isProton = isDetectedProton;
     }
 
-    if ((isPion && isKaon) || (isPion && isProton) || (isKaon && isProton)) {
+    if (cfgPIDUseRejection && ((isPion && isKaon) || (isPion && isProton) || (isKaon && isProton))) {
       return -1; // more than one particle satisfy the criteria
     }
 

From eafe0e6867ffa00d057e0779c8d0ac5e331b6c69 Mon Sep 17 00:00:00 2001
From: ALICE Action Bot <alibuild@cern.ch>
Date: Tue, 10 Feb 2026 19:23:16 +0000
Subject: [PATCH 2/2] Please consider the following formatting changes

---
 PWGCF/TwoParticleCorrelations/Tasks/pidDiHadron.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/PWGCF/TwoParticleCorrelations/Tasks/pidDiHadron.cxx b/PWGCF/TwoParticleCorrelations/Tasks/pidDiHadron.cxx
index 97b0d969358..b6bd2c3afcc 100644
--- a/PWGCF/TwoParticleCorrelations/Tasks/pidDiHadron.cxx
+++ b/PWGCF/TwoParticleCorrelations/Tasks/pidDiHadron.cxx
@@ -184,7 +184,7 @@ struct PidDiHadron {
 
   // make the filters and cuts.
   Filter collisionFilter = (nabs(aod::collision::posZ) < cfgCutVertex);
-  Filter trackFilter = (nabs(aod::track::eta) < cfgCutEta) && (aod::track::pt > cfgCutPtPOIMin) && (aod::track::pt < cfgCutPtPOIMax) && ((requireGlobalTrackInFilter()) || (aod::track::isGlobalTrackSDD == (uint8_t)true)) && (aod::track::tpcChi2NCl < cfgCutChi2prTPCcls) && (nabs(aod::track::dcaZ) < cfgCutDCAz);
+  Filter trackFilter = (nabs(aod::track::eta) < cfgCutEta) && (aod::track::pt > cfgCutPtPOIMin) && (aod::track::pt < cfgCutPtPOIMax) && ((requireGlobalTrackInFilter()) || (aod::track::isGlobalTrackSDD == (uint8_t) true)) && (aod::track::tpcChi2NCl < cfgCutChi2prTPCcls) && (nabs(aod::track::dcaZ) < cfgCutDCAz);
 
   using FilteredCollisions = soa::Filtered<soa::Join<aod::Collisions, aod::EvSel, aod::CentFT0Cs, aod::CentFT0CVariant1s, aod::CentFT0Ms, aod::CentFV0As, aod::Mults>>;
   using FilteredTracks = soa::Filtered<soa::Join<aod::Tracks, aod::TrackSelection, aod::TracksExtra, aod::TracksDCA, aod::pidTPCFullPi, aod::pidTPCFullKa, aod::pidTPCFullPr, aod::pidTOFbeta, aod::pidTOFFullPi, aod::pidTOFFullKa, aod::pidTOFFullPr>>;