From 0df3f0a5a6211f312ad6fa6b274c5e93952d16bf Mon Sep 17 00:00:00 2001
From: Zhenjun Xiong <108917659+zjxiongOvO@users.noreply.github.com>
Date: Thu, 28 May 2026 14:08:36 +0200
Subject: [PATCH] Fix bin index retrieval for efficiency histogram

find fPt instead of fPairPt
---
 PWGDQ/Core/VarManager.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/PWGDQ/Core/VarManager.cxx b/PWGDQ/Core/VarManager.cxx
index 1d5bd30e476..f9c0105dbd5 100644
--- a/PWGDQ/Core/VarManager.cxx
+++ b/PWGDQ/Core/VarManager.cxx
@@ -414,7 +414,7 @@ void VarManager::FillEfficiency(float* values)
     }
     TH3F* efficiencyHist = reinterpret_cast<TH3F*>(fgEfficiencyHist);
     // Get the bin indices for the efficiency histogram
-    int binPt = efficiencyHist->GetXaxis()->FindBin(values[kPairPt]);
+    int binPt = efficiencyHist->GetXaxis()->FindBin(values[kPt]);
     binPt = (binPt == 0 ? 1 : binPt);
     binPt = (binPt > efficiencyHist->GetXaxis()->GetNbins() ? efficiencyHist->GetXaxis()->GetNbins() : binPt);
     int binCent = efficiencyHist->GetYaxis()->FindBin(values[kCentFT0C]);