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[PWGLF] Adds selection based on <Nch> and sigma #11166

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Merged
abmodak merged 1 commit into from
May 12, 2025
Merged

[PWGLF] Adds selection based on <Nch> and sigma #11166

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60 changes: 48 additions & 12 deletions PWGLF/Tasks/GlobalEventProperties/uccZdc.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -244,6 +244,8 @@ struct UccZdc {
registry.add("EtaVsPhi", ";#eta;#varphi", kTH2F, {{{axisEta}, {100, -0.1 * PI, +2.1 * PI}}});
registry.add("sigma1Pt", ";;#sigma(p_{T})/p_{T};", kTProfile, {axisPt});
registry.add("dcaXYvspT", ";DCA_{xy} (cm);;", kTH2F, {{{50, -1., 1.}, {axisPt}}});
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, {{300, 0., 3000.}});

registry.add("Nch", ";#it{N}_{ch} (|#eta| < 0.8, Corrected);", kTH1F, {{nBinsNch, minNch, maxNch}});
registry.add("NchVsPt", ";#it{N}_{ch} (|#eta| < 0.8, Corrected);;", kTH2F, {{{nBinsNch, minNch, maxNch}, {axisPt}}});
Expand Down Expand Up @@ -531,10 +533,10 @@ struct UccZdc {
float znC{zdc.amplitudeZNC()};
float zpA{zdc.amplitudeZPA()};
float zpC{zdc.amplitudeZPC()};
znA /= 2.81;
znC /= 2.81;
zpA /= 2.81;
zpC /= 2.81;
znA /= 2.68;
znC /= 2.68;
zpA /= 2.68;
zpC /= 2.68;

float tZEM1{zdc.timeZEM1()};
float tZEM2{zdc.timeZEM2()};
Expand Down Expand Up @@ -579,10 +581,10 @@ struct UccZdc {
registry.fill(HIST("zPos"), collision.posZ());
registry.fill(HIST("T0Ccent"), collision.centFT0C());

registry.fill(HIST("ZNCcvsZNCsum"), sumZNC / 2.81, zdc.energyCommonZNC() / 2.81);
registry.fill(HIST("ZNAcvsZNAsum"), sumZNA / 2.81, zdc.energyCommonZNA() / 2.81);
registry.fill(HIST("ZPCcvsZPCsum"), sumZPC / 2.81, zdc.energyCommonZPC() / 2.81);
registry.fill(HIST("ZPAcvsZPAsum"), sumZPA / 2.81, zdc.energyCommonZPA() / 2.81);
registry.fill(HIST("ZNCcvsZNCsum"), sumZNC / 2.68, zdc.energyCommonZNC() / 2.68);
registry.fill(HIST("ZNAcvsZNAsum"), sumZNA / 2.68, zdc.energyCommonZNA() / 2.68);
registry.fill(HIST("ZPCcvsZPCsum"), sumZPC / 2.68, zdc.energyCommonZPC() / 2.68);
registry.fill(HIST("ZPAcvsZPAsum"), sumZPA / 2.68, zdc.energyCommonZPA() / 2.68);

registry.fill(HIST("ZNA"), znA);
registry.fill(HIST("ZNC"), znC);
Expand Down Expand Up @@ -636,9 +638,21 @@ struct UccZdc {
// LOGF(info, "Getting object %s for run number %i from timestamp=%llu", paTH.value.data(), foundBC.runNumber(), foundBC.timestamp());

auto efficiency = ccdb->getForTimeStamp<TH1F>(paTH.value, foundBC.timestamp());
// auto efficiency = ccdb->getForRun<TH1F>(paTH.value, foundBC.runNumber());
if (!efficiency) {
LOGF(fatal, "Efficiency object not found!");
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?
Expand All @@ -647,7 +661,16 @@ struct UccZdc {
}
registry.fill(HIST("hEventCounter"), EvCutLabel::Zdc);

if (!foundBC.has_ft0()) {
// has T0?
float aT0A = 0., aT0C = 0.;
if (foundBC.has_ft0()) {
for (const auto& amplitude : foundBC.ft0().amplitudeA()) {
aT0A += amplitude;
}
for (const auto& amplitude : foundBC.ft0().amplitudeC()) {
aT0C += amplitude;
}
} else {
return;
}
registry.fill(HIST("hEventCounter"), EvCutLabel::TZero);
Expand All @@ -662,8 +685,8 @@ struct UccZdc {
float tZPC{foundBC.zdc().timeZPC()};
float tZDCdif{tZNC + tZPC - tZNA - tZPA};
float tZDCsum{tZNC + tZPC + tZNA + tZPA};
znA /= 2.81;
znC /= 2.81;
znA /= 2.68;
znC /= 2.68;
float sumZNs{znA + znC};
float sumZEMs{aZEM1 + aZEM2};

Expand All @@ -686,6 +709,7 @@ struct UccZdc {
registry.fill(HIST("zPos"), collision.posZ());
registry.fill(HIST("T0Ccent"), collision.centFT0C());

int glbTracks{0};
std::vector<float> pTs;
std::vector<float> wIs;
// Calculates the event weight, W_k
Expand All @@ -698,6 +722,7 @@ struct UccZdc {
registry.fill(HIST("sigma1Pt"), track.pt(), track.sigma1Pt());
registry.fill(HIST("dcaXYvspT"), track.dcaXY(), track.pt());

glbTracks++;
float pt{track.pt()};
double weight{efficiency->GetBinContent(efficiency->FindBin(pt))};
if (weight > 0.) {
Expand All @@ -712,10 +737,21 @@ struct UccZdc {
}
}

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;
}

double p1, p2, p3, p4, w1, w2, w3, w4;
p1 = p2 = p3 = p4 = w1 = w2 = w3 = w4 = 0.0;
getPTpowers(pTs, wIs, p1, w1, p2, w2, p3, w3, p4, w4);
const double nch{static_cast<double>(pTs.size())};
// To avoid calculating <pt> with zero particles
if (nch < minNchSel) {
return;
}
Expand Down
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