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[PWGCF] Add QA histogram Nch vs Centrality #17973

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Merged
abmodak merged 3 commits into from
Sep 19, 2026
+9 −0
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[PWGCF] Add QA histogram Nch vs Centrality #17973

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0c47781
Add QA histogram Nch vs Centrality
abmodak Sep 19, 2026
8cf26ad
Please consider the following formatting changes
alibuild Sep 19, 2026
63846ef
Merge pull request #16 from alibuild/alibot-cleanup-17973
abmodak Sep 19, 2026
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9 changes: 9 additions & 0 deletions PWGCF/TwoParticleCorrelations/TableProducer/longrangeMaker.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -236,6 +236,9 @@ struct LongrangeMaker {
ConfigurableAxis axisPQA{"axisPQA", {100, 0.0, 10.0}, "p (GeV/c)"};
ConfigurableAxis axisTpcSignal{"axisTpcSignal", {250, 0, 250}, "TPC dE/dx (a.u.)"};
ConfigurableAxis axisMultiplicity{"axisMultiplicity", {VARIABLE_WIDTH, 0, 5, 10, 15, 25, 30, 40, 50, 60, 80, 100, 150, 200}, "Multiplicity / Centrality"};

ConfigurableAxis axisMultQA{"axisMultQA", {500, -0.5, 499.5}, "multiplicity QA axis"};
ConfigurableAxis axisCentQA{"axisCentQA", {100, 0., 100.}, "centrality QA axis"};
} cfgAxis;

Configurable<std::vector<double>> itsNsigmaPidCut{"itsNsigmaPidCut", std::vector<double>{3, 2.5, 2, -3, -2.5, -2}, "ITS n-sigma cut for pions_posNsigma, kaons_posNsigma, protons_posNsigma, pions_negNsigma, kaons_negNsigma, protons_negNsigma"};
Expand Down Expand Up @@ -346,6 +349,9 @@ struct LongrangeMaker {
histos.add("hTpcdEdx_pos_after", "Pos-prong dE/dx After PID;V0 Species;Multiplicity;p (GeV/c);TPC dE/dx", kTHnSparseF, {cfgAxis.axisV0Species, cfgAxis.axisMultiplicity, cfgAxis.axisPQA, cfgAxis.axisTpcSignal});
histos.add("hTpcdEdx_neg_after", "Neg-prong dE/dx After PID;V0 Species;Multiplicity;p (GeV/c);TPC dE/dx", kTHnSparseF, {cfgAxis.axisV0Species, cfgAxis.axisMultiplicity, cfgAxis.axisPQA, cfgAxis.axisTpcSignal});

histos.add("Nch_vs_Centrality", "Nch_vs_Centrality", kTH2D, {cfgAxis.axisCentQA, cfgAxis.axisMultQA});
histos.add("PVtracks_vs_Centrality", "PVtracks_vs_Centrality", kTH2D, {cfgAxis.axisCentQA, cfgAxis.axisMultQA});

myTrackFilter = getGlobalTrackSelectionRun3ITSMatch(TrackSelection::GlobalTrackRun3ITSMatching::Run3ITSibAny,
TrackSelection::GlobalTrackRun3DCAxyCut::Default);
myTrackFilter.SetPtRange(cfgtrksel.cfgPtCutMin, cfgtrksel.cfgPtCutMax);
Expand Down Expand Up @@ -428,6 +434,9 @@ struct LongrangeMaker {
}
float multiplicity = countNTracks(tracks, col.posZ());
float centrality = selColCent(col);
histos.fill(HIST("Nch_vs_Centrality"), col.centFT0C(), multiplicity);
histos.fill(HIST("PVtracks_vs_Centrality"), col.centFT0C(), col.multNTracksPV());

if (cfgfittrksel.cfgVerbosity > 0) {
LOGF(info, "Event multiplicity = %f | centrality = %f", multiplicity, centrality);
}
Expand Down
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