From 7be4ffdd912e58420b14edbe74d8fbafbcb092f5 Mon Sep 17 00:00:00 2001
From: Daiki Sekihata <daiki.sekihata@cern.ch>
Date: Sun, 10 Aug 2025 12:45:46 +0200
Subject: [PATCH] PWGEM/PhotonMeson: update 2PC

---
 PWGEM/PhotonMeson/Core/DiphotonHadronMPC.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/PWGEM/PhotonMeson/Core/DiphotonHadronMPC.h b/PWGEM/PhotonMeson/Core/DiphotonHadronMPC.h
index 706bb6ad6c4..53e26450c64 100644
--- a/PWGEM/PhotonMeson/Core/DiphotonHadronMPC.h
+++ b/PWGEM/PhotonMeson/Core/DiphotonHadronMPC.h
@@ -371,7 +371,7 @@ struct DiphotonHadronMPC {
     fRegistry.addClone("DiphotonHadron/same/", "DiphotonHadron/mix/");
 
     // hadron-hadron
-    const AxisSpec axis_deta_hh{ConfDEtaBins, "#Delta#eta = #eta_{h}^{ref1} - #eta_{h}^{ref2}"};
+    const AxisSpec axis_deta_hh{60, -3, +3, "#Delta#eta = #eta_{h}^{ref1} - #eta_{h}^{ref2}"};
     const AxisSpec axis_dphi_hh{cfgNbinsDPhi, -M_PI / 2, +3 * M_PI / 2, "#Delta#varphi = #varphi_{h}^{ref1} - #varphi_{h}^{ref2} (rad.)"};
     // const AxisSpec axis_cosndphi_hh{cfgNbinsCosNDPhi, -1, +1, std::format("cos({0:d}(#varphi_{{h}}^{{ref1}} - #varphi_{{h}}^{{ref2}}))", cfgNmod.value)};
     fRegistry.add("HadronHadron/same/hDEtaDPhi", "hadron-hadron 2PC", kTH2D, {axis_dphi_hh, axis_deta_hh}, true);