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[PWGLF] Add flag to use T0M or V0A-based Nch rejection #12232

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Merged
abmodak merged 1 commit into from
Jul 25, 2025
Merged

[PWGLF] Add flag to use T0M or V0A-based Nch rejection #12232

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37 changes: 30 additions & 7 deletions PWGLF/Tasks/GlobalEventProperties/uccZdc.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -37,6 +37,7 @@

#include "TPDGCode.h"
#include <TRandom3.h>
#include <TString.h>

#include <chrono>
#include <cmath>
Expand Down Expand Up @@ -118,6 +119,7 @@ struct UccZdc {
Configurable<bool> applyFD{"applyFD", false, "Apply track-by-track feed down correction"};
Configurable<bool> correctNch{"correctNch", true, "Correct also Nch"};
Configurable<bool> skipRecoColGTOne{"skipRecoColGTOne", true, "Remove collisions if reconstructed more than once"};
Configurable<std::string> detector4Calibration{"detector4Calibration", "T0M", "Detector for nSigma-Nch rejection"};

// Event selection
Configurable<float> posZcut{"posZcut", +10.0, "z-vertex position cut"};
Expand Down Expand Up @@ -243,6 +245,7 @@ struct UccZdc {
registry.add("NchUncorrected", Form(";%s;Entries;", tiNch), kTH1F, {{nBinsNch, minNch, maxNch}});
registry.add("hEventCounter", ";;Events", kTH1F, {axisEvent});
registry.add("ExcludedEvtVsFT0M", Form(";%s;Entries;", tiT0M), kTH1F, {{nBinsAmpFT0, 0., maxAmpFT0}});
registry.add("ExcludedEvtVsFV0A", Form(";%s;Entries;", tiT0M), kTH1F, {{nBinsAmpV0A, 0., maxAmpV0A}});
registry.add("ExcludedEvtVsNch", Form(";%s;Entries;", tiNch), kTH1F, {{nBinsNch, minNch, maxNch}});
registry.add("Nch", Form(";%s;Entries;", tiNch), kTH1F, {{nBinsNch, minNch, maxNch}});
registry.add("NchVsOneParCorr", Form(";%s;%s;", tiNch, tiOneParCorr), kTProfile, {{nBinsNch, minNch, maxNch}});
Expand Down Expand Up @@ -403,6 +406,7 @@ struct UccZdc {
LOG(info) << "\tpaTHEff=" << paTHEff.value;
LOG(info) << "\tpaTHFD=" << paTHFD.value;
LOG(info) << "\tuseMidRapNchSel=" << useMidRapNchSel.value;
LOG(info) << "\tdetector4Calibration=" << detector4Calibration.value;
LOG(info) << "\tnSigmaNchCut=" << nSigmaNchCut.value;
LOG(info) << "\tpaTHmeanNch=" << paTHmeanNch.value;
LOG(info) << "\tpaTHsigmaNch=" << paTHsigmaNch.value;
Expand Down Expand Up @@ -599,14 +603,24 @@ struct UccZdc {
if (!(cfgNch.hMeanNch && cfgNch.hSigmaNch))
return;

const int binT0M{cfgNch.hMeanNch->FindBin(normT0M)};
const double meanNch{cfgNch.hMeanNch->GetBinContent(binT0M)};
const double sigmaNch{cfgNch.hSigmaNch->GetBinContent(binT0M)};
TString s1 = TString(detector4Calibration.value);
double xEval{1.};
if (s1 == "T0M") {
xEval = normT0M;
}
if (s1 == "V0A") {
xEval = normV0A;
}

const int bin4Calibration{cfgNch.hMeanNch->FindBin(xEval)};
const double meanNch{cfgNch.hMeanNch->GetBinContent(bin4Calibration)};
const double sigmaNch{cfgNch.hSigmaNch->GetBinContent(bin4Calibration)};
const double nSigmaSelection{nSigmaNchCut * sigmaNch};
const double diffMeanNch{meanNch - glbTracks};

if (std::abs(diffMeanNch) > nSigmaSelection) {
registry.fill(HIST("ExcludedEvtVsFT0M"), normT0M);
registry.fill(HIST("ExcludedEvtVsFV0A"), normV0A);
registry.fill(HIST("ExcludedEvtVsNch"), glbTracks);
skipEvent = true;
}
Expand Down Expand Up @@ -763,19 +777,28 @@ struct UccZdc {

bool skipEvent{false};
if (useMidRapNchSel) {

loadNchCalibrations(foundBC.timestamp());
if (!(cfgNch.hMeanNch && cfgNch.hSigmaNch))
return;

const int binT0M{cfgNch.hMeanNch->FindBin(normT0M)};
const double meanNch{cfgNch.hMeanNch->GetBinContent(binT0M)};
const double sigmaNch{cfgNch.hSigmaNch->GetBinContent(binT0M)};
TString s1 = TString(detector4Calibration.value);
double xEval{1.};
if (s1 == "T0M") {
xEval = normT0M;
}
if (s1 == "V0A") {
xEval = normV0A;
}

const int bin4Calibration{cfgNch.hMeanNch->FindBin(xEval)};
const double meanNch{cfgNch.hMeanNch->GetBinContent(bin4Calibration)};
const double sigmaNch{cfgNch.hSigmaNch->GetBinContent(bin4Calibration)};
const double nSigmaSelection{nSigmaNchCut * sigmaNch};
const double diffMeanNch{meanNch - glbTracks};

if (std::abs(diffMeanNch) > nSigmaSelection) {
registry.fill(HIST("ExcludedEvtVsFT0M"), normT0M);
registry.fill(HIST("ExcludedEvtVsFV0A"), normV0A);
registry.fill(HIST("ExcludedEvtVsNch"), glbTracks);
skipEvent = true;
}
Expand Down
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