PWGEM/Dilepton: fix histogram names

Author: dsekihat

PWGEM/Dilepton/Core/SingleTrackQC.h

@@ -318,9 +318,9 @@ struct SingleTrackQC {
       fRegistry.add("Track/positive/hNclsMFT", "number of MFT clusters", kTH1F, {{11, -0.5, 10.5}}, false);
       fRegistry.add("Track/positive/hPDCA", "pDCA;R at absorber end (cm);p #times DCA (GeV/c #upoint cm)", kTH2F, {{100, 0, 100}, {100, 0.0f, 1000}}, false);
       fRegistry.add("Track/positive/hChi2_Pt", "chi2;p_{T,#mu} (GeV/c);chi2/ndf", kTH2F, {{100, 0, 10}, {100, 0.0f, 10}}, false);
-      fRegistry.add("Track/positive/hChi2MFT", "chi2MFT;p_{T,#mu} (GeV/c);chi2/ndf", kTH2F, {{100, 0, 10}, {100, 0.0f, 10}}, false);
-      fRegistry.add("Track/positive/hChi2MatchMCHMID", "chi2 match MCH-MID;p_{T,#mu} (GeV/c);chi2/ndf", kTH2F, {{100, 0, 10}, {200, 0.0f, 20}}, false);
-      fRegistry.add("Track/positive/hChi2MatchMCHMFT", "chi2 match MCH-MFT;p_{T,#mu} (GeV/c);chi2/ndf", kTH2F, {{100, 0, 10}, {500, 0.0f, 50}}, false);
+      fRegistry.add("Track/positive/hChi2MFT_Pt", "chi2MFT;p_{T,#mu} (GeV/c);chi2/ndf", kTH2F, {{100, 0, 10}, {100, 0.0f, 10}}, false);
+      fRegistry.add("Track/positive/hChi2MatchMCHMID_Pt", "chi2 match MCH-MID;p_{T,#mu} (GeV/c);chi2/ndf", kTH2F, {{100, 0, 10}, {200, 0.0f, 20}}, false);
+      fRegistry.add("Track/positive/hChi2MatchMCHMFT_Pt", "chi2 match MCH-MFT;p_{T,#mu} (GeV/c);chi2/ndf", kTH2F, {{100, 0, 10}, {500, 0.0f, 50}}, false);
       fRegistry.add("Track/positive/hMFTClusterMap", "MFT cluster map", kTH1F, {{1024, -0.5, 1023.5}}, false);
       fRegistry.add("Track/positive/hdR_Chi2MatchMCHMFT", "dr vs. matching chi2 MCH-MFT;chi2 match MCH-MFT;#DeltaR;", kTH2F, {{200, 0, 50}, {200, 0, 0.5}}, false);
       fRegistry.addClone("Track/positive/", "Track/negative/");