fix bug in event mixing

Author: ypwangg

PWGDQ/Core/VarManager.h

@@ -4352,7 +4352,7 @@ void VarManager::FillPairME(T1 const& t1, T2 const& t2, float* values)
     values[kWV24ME] = (std::isnan(V22ME) || std::isinf(V22ME) || std::isnan(V24ME) || std::isinf(V24ME)) ? 0. : 1.0;
 
     // coherent Jpsi A2
-    bool useCoherentJpsiA2 = fgUsedVars[kA2EP_TPC] || fgUsedVars[kA2EP_FT0A] || fgUsedVars[kA2EP_FT0C];
+    bool useCoherentJpsiA2 = fgUsedVars[kA2EPME_TPC] || fgUsedVars[kA2EPME_FT0A] || fgUsedVars[kA2EPME_FT0C];
     if (useCoherentJpsiA2) {
       ROOT::Math::Boost boostv12{v12.BoostToCM()};
       ROOT::Math::PtEtaPhiMVector v_daughter = boostv12(t1.sign() > 0 ? v1 : v2);