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[PWGLF] Introduced selection on Nch #11138

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Merged
gbencedi merged 1 commit into from
May 9, 2025
Merged

[PWGLF] Introduced selection on Nch #11138

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41 changes: 33 additions & 8 deletions PWGLF/Tasks/GlobalEventProperties/uccZdc.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -46,6 +46,7 @@
#include "ReconstructionDataFormats/GlobalTrackID.h"
#include "ReconstructionDataFormats/Track.h"
#include "TPDGCode.h"
#include "TF1.h"

using namespace std;
using namespace o2;
Expand Down Expand Up @@ -107,6 +108,7 @@ struct UccZdc {
Configurable<bool> isTDCcut{"isTDCcut", false, "Use TDC cut?"};
Configurable<bool> isZEMcut{"isZEMcut", true, "Use ZEM cut?"};

Configurable<double> nSigmaNchCut{"nSigmaNchCut", 1., "nSigma Nch selection"};
Configurable<double> minNchSel{"minNchSel", 5., "min Nch Selection"};
Configurable<float> znBasedCut{"znBasedCut", 100, "ZN-based cut"};
Configurable<float> zemCut{"zemCut", 1000., "ZEM cut"};
Expand Down Expand Up @@ -164,9 +166,13 @@ struct UccZdc {

Service<ccdb::BasicCCDBManager> ccdb;
Configurable<std::string> paTH{"paTH", "Users/o/omvazque/TrackingEfficiency", "base path to the ccdb object"};
Configurable<std::string> paTHmeanNch{"paTHmeanNch", "Users/o/omvazque/FitMeanNch", "base path to the ccdb object"};
Configurable<std::string> paTHsigmaNch{"paTHsigmaNch", "Users/o/omvazque/FitSigmaNch", "base path to the ccdb object"};

// the efficiency has been previously stored in the CCDB as TH1F histogram
TH1F* efficiency = nullptr;
TF1* fitSigmaNch = nullptr;
TF1* fitMeanNch = nullptr;

void init(InitContext const&)
{
Expand Down Expand Up @@ -301,14 +307,16 @@ struct UccZdc {
if (doprocessQA) {
registry.add("T0Ccent", ";;Entries", kTH1F, {axisCent});
registry.add("EtaVsPhi", ";#eta;#varphi", kTH2F, {{{axisEta}, {100, -0.1 * PI, +2.1 * PI}}});
registry.add("dcaXYvspTOpen", ";DCA_{xy} (cm);;", kTH2F, {{{150, -3., 3.}, {axisPt}}});
registry.add("dcaXYvspT", ";DCA_{xy} (cm);;", kTH2F, {{{150, -3., 3.}, {axisPt}}});
registry.add("dcaXYvspTOpen", ";DCA_{xy} (cm);;", kTH2F, {{{150, -1.5, 1.5}, {axisPt}}});
registry.add("dcaXYvspT", ";DCA_{xy} (cm);;", kTH2F, {{{150, -1.5, 1.5}, {axisPt}}});
registry.add("nClustersITS", ";<n clusters ITS>;;", kTProfile, {{axisPt}});
registry.add("nClustersTPC", ";<n clusters TPC>;;", kTProfile, {{axisPt}});

registry.add("ZNVsFT0A", ";T0A (#times 1/100);ZNA+ZNC;", kTH2F, {{{nBinsAmpFT0, 0., maxAmpFT0}, {nBinsZDC, -0.5, maxZN}}});
registry.add("ZNVsFT0C", ";T0C (#times 1/100);ZNA+ZNC;", kTH2F, {{{nBinsAmpFT0, 0., maxAmpFT0}, {nBinsZDC, -0.5, maxZN}}});
registry.add("ZNVsFT0M", ";T0A+T0C (#times 1/100);ZNA+ZNC;", kTH2F, {{{nBinsAmpFT0, 0., 3000.}, {nBinsZDC, -0.5, maxZN}}});
registry.add("RejectedEvtsVsFT0M", ";T0A+T0C (#times 1/100, -3.3 < #eta < -2.1 and 3.5 < #eta < 4.9);Entries;", kTH1F, {{nBinsAmpFT0, 0., 3000.}});
registry.add("RejectedEvtsVsNch", ";#it{N}_{ch} (|#eta|<0.8);Entries;", kTH1F, {{nBinsNch, minNch, maxNch}});

registry.add("ZN", ";ZNA+ZNC;Entries;", kTH1F, {{nBinsZDC, -0.5, maxZN}});
registry.add("ZNA", ";ZNA;Entries;", kTH1F, {{nBinsZDC, -0.5, maxZN}});
Expand Down Expand Up @@ -452,6 +460,18 @@ struct UccZdc {
return;
}

auto fitMeanNch = ccdb->getForTimeStamp<TF1>(paTHmeanNch.value, foundBC.timestamp());
if (!fitMeanNch) {
LOGF(fatal, "fitMeanNch object not found!");
return;
}

auto fitSigmaNch = ccdb->getForTimeStamp<TF1>(paTHsigmaNch.value, foundBC.timestamp());
if (!fitSigmaNch) {
LOGF(fatal, "fitSigmaNch object not found!");
return;
}

// has ZDC?
if (!foundBC.has_zdc()) {
return;
Expand Down Expand Up @@ -533,6 +553,7 @@ struct UccZdc {
}
// Track Selection
if (myTrackSel.IsSelected(track)) {
registry.fill(HIST("dcaXYvspTOpen"), track.dcaXY(), track.pt());
if (passesDCAxyCut(track)) {
glbTracks++;
meanpt += track.pt();
Expand All @@ -541,12 +562,20 @@ struct UccZdc {
registry.fill(HIST("dcaXYvspT"), track.dcaXY(), track.pt());
registry.fill(HIST("nClustersITS"), track.pt(), track.itsNCls());
registry.fill(HIST("nClustersTPC"), track.pt(), track.tpcNClsFound());
} else {
registry.fill(HIST("dcaXYvspTOpen"), track.dcaXY(), track.pt());
}
}
}

const double meanNch{fitMeanNch->Eval((aT0A + aT0C) / 100.)};
const double sigmaNch{fitSigmaNch->Eval((aT0A + aT0C) / 100.)};
const double diffMeanNch{std::abs(meanNch - glbTracks)};
const double nSigmaSelection{nSigmaNchCut * sigmaNch};
if (!(diffMeanNch < nSigmaSelection)) {
registry.fill(HIST("RejectedEvtsVsFT0M"), (aT0A + aT0C) / 100.);
registry.fill(HIST("RejectedEvtsVsNch"), glbTracks);
return;
}

registry.fill(HIST("zPos"), collision.posZ());
registry.fill(HIST("T0Ccent"), collision.centFT0C());

Expand Down Expand Up @@ -577,10 +606,6 @@ struct UccZdc {
registry.fill(HIST("ZNVsFT0C"), aT0C / 100., sumZNs);
registry.fill(HIST("ZNVsFT0M"), (aT0A + aT0C) / 100., sumZNs);

if (sumZNs > znBasedCut) {
return;
}

registry.fill(HIST("NchVsFV0A"), aV0A / 100., glbTracks);
registry.fill(HIST("NchVsFT0A"), aT0A / 100., glbTracks);
registry.fill(HIST("NchVsFT0C"), aT0C / 100., glbTracks);
Expand Down
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