[PWGEM] adding labels to single track histograms (#10353)

Author: feisenhu

PWGEM/Dilepton/Core/SingleTrackQC.h

@@ -227,17 +227,17 @@ struct SingleTrackQC {
       fRegistry.add("Track/positive/hDCAxyzSigma", "DCA xy vs. z;DCA_{xy} (#sigma);DCA_{z} (#sigma)", kTH2F, {{200, -10.0f, 10.0f}, {200, -10.0f, 10.0f}}, false);
       fRegistry.add("Track/positive/hDCAxyRes_Pt", "DCA_{xy} resolution vs. pT;p_{T} (GeV/c);DCA_{xy} resolution (#mum)", kTH2F, {{200, 0, 10}, {200, 0., 400}}, false);
       fRegistry.add("Track/positive/hDCAzRes_Pt", "DCA_{z} resolution vs. pT;p_{T} (GeV/c);DCA_{z} resolution (#mum)", kTH2F, {{200, 0, 10}, {200, 0., 400}}, false);
-      fRegistry.add("Track/positive/hNclsTPC", "number of TPC clusters", kTH1F, {{161, -0.5, 160.5}}, false);
-      fRegistry.add("Track/positive/hNcrTPC", "number of TPC crossed rows", kTH1F, {{161, -0.5, 160.5}}, false);
-      fRegistry.add("Track/positive/hChi2TPC", "chi2/number of TPC clusters", kTH1F, {{100, 0, 10}}, false);
+      fRegistry.add("Track/positive/hNclsTPC", "number of TPC clusters;TPC N_{cls}", kTH1F, {{161, -0.5, 160.5}}, false);
+      fRegistry.add("Track/positive/hNcrTPC", "number of TPC crossed rows;TPC N_{CR}", kTH1F, {{161, -0.5, 160.5}}, false);
+      fRegistry.add("Track/positive/hChi2TPC", "chi2/number of TPC clusters;TPC #chi^{2}/N_{CR}", kTH1F, {{100, 0, 10}}, false);
       fRegistry.add("Track/positive/hDeltaPin", "p_{in} vs. p_{pv};p_{pv} (GeV/c);(p_{in} - p_{pv})/p_{pv}", kTH2F, {{1000, 0, 10}, {200, -1, +1}}, false);
-      fRegistry.add("Track/positive/hTPCNcr2Nf", "TPC Ncr/Nfindable", kTH1F, {{200, 0, 2}}, false);
-      fRegistry.add("Track/positive/hTPCNcls2Nf", "TPC Ncls/Nfindable", kTH1F, {{200, 0, 2}}, false);
+      fRegistry.add("Track/positive/hTPCNcr2Nf", "TPC Ncr/Nfindable;TPC N_{CR}/N_{cls}^{findable}", kTH1F, {{200, 0, 2}}, false);
+      fRegistry.add("Track/positive/hTPCNcls2Nf", "TPC Ncls/Nfindable;TPC N_{cls}/N_{cls}^{findable}", kTH1F, {{200, 0, 2}}, false);
       fRegistry.add("Track/positive/hTPCNclsShared", "TPC Ncls shared/Ncls;p_{T} (GeV/c);N_{cls}^{shared}/N_{cls} in TPC", kTH2F, {{1000, 0, 10}, {100, 0, 1}}, false);
-      fRegistry.add("Track/positive/hNclsITS", "number of ITS clusters", kTH1F, {{8, -0.5, 7.5}}, false);
-      fRegistry.add("Track/positive/hChi2ITS", "chi2/number of ITS clusters", kTH1F, {{100, 0, 10}}, false);
+      fRegistry.add("Track/positive/hNclsITS", "number of ITS clusters;ITS N_{cls}", kTH1F, {{8, -0.5, 7.5}}, false);
+      fRegistry.add("Track/positive/hChi2ITS", "chi2/number of ITS clusters;ITS #chi^{2}/N_{cls}", kTH1F, {{100, 0, 10}}, false);
       fRegistry.add("Track/positive/hITSClusterMap", "ITS cluster map", kTH1F, {{128, -0.5, 127.5}}, false);
-      fRegistry.add("Track/positive/hChi2TOF", "TOF Chi2;p_{pv} (GeV/c);chi2", kTH2F, {{1000, 0, 10}, {100, 0, 10}}, false);
+      fRegistry.add("Track/positive/hChi2TOF", "TOF Chi2;p_{pv} (GeV/c);TOF #chi^{2}", kTH2F, {{1000, 0, 10}, {100, 0, 10}}, false);
 
       fRegistry.add("Track/positive/hTPCdEdx", "TPC dE/dx;p_{in} (GeV/c);TPC dE/dx (a.u.)", kTH2F, {{1000, 0, 10}, {200, 0, 200}}, false);
       fRegistry.add("Track/positive/hTPCNsigmaEl", "TPC n sigma el;p_{in} (GeV/c);n #sigma_{e}^{TPC}", kTH2F, {{1000, 0, 10}, {100, -5, +5}}, false);