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[PWGCF] Add NUA correction in the correlation task #16746

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Merged
jaelpark merged 2 commits into from
Jun 19, 2026
+72 −38
Merged

[PWGCF] Add NUA correction in the correlation task #16746

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da28205
Add track histogram for NUA correction
abmodak Jun 19, 2026
5e0d03d
Add NUA correction in the task
abmodak Jun 19, 2026
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30 changes: 15 additions & 15 deletions PWGCF/TwoParticleCorrelations/TableProducer/longrangeMaker.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -152,9 +152,8 @@ struct LongrangeMaker {
Configurable<float> maxChi2PerClusterITS{"maxChi2PerClusterITS", 36.f, "cut on maximum value of ITS chi2 per cluster"};
Configurable<float> maxDcaZ{"maxDcaZ", 2.0f, "cut on maximum abs value of DCA z"};
Configurable<float> maxDcaXY{"maxDcaXY", 1.0f, "cut on maximum abs value of DCA xy"};
Configurable<float> cfgLowEffCut{"cfgLowEffCut", 0.001f, "Low efficiency cut"};
Configurable<bool> applyEffCorr{"applyEffCorr", true, "Enable efficiency correction"};
Configurable<std::string> cfgEffccdbPath{"cfgEffccdbPath", "/alice/data/CCDB/Users/a/abmodak/OO/Efficiency", "Browse track eff object from CCDB"};
Configurable<std::string> cfgEffccdbPath{"cfgEffccdbPath", "Users/a/abmodak/Efficiency/OO/default", "Browse track eff object from CCDB"};
} cfgtrksel;

struct : ConfigurableGroup {
Expand Down Expand Up @@ -316,6 +315,7 @@ struct LongrangeMaker {
histos.add("FT0C_Channel_vs_Amp_gaincorrected", "FT0C_Channel_vs_Amp_gaincorrected", kTH2D, {cfgAxis.axisChannel, cfgAxis.axisAmplitude});
histos.add("FT0C_Channel_vs_eta", "FT0C_Channel_vs_eta", kTH2D, {cfgAxis.axisEta, cfgAxis.axisChannel});
histos.add("FT0C_Channel_vs_phi", "FT0C_Channel_vs_phi", kTH2D, {cfgAxis.axisPhi, cfgAxis.axisChannel});
histos.add("h3DVtxZetaPhi", "", kTH3D, {{20, -10, 10}, {16, -0.8, +0.8}, {100, 0., TwoPI}});

myTrackFilter = getGlobalTrackSelectionRun3ITSMatch(TrackSelection::GlobalTrackRun3ITSMatching::Run3ITSibAny,
TrackSelection::GlobalTrackRun3DCAxyCut::Default);
Expand Down Expand Up @@ -432,6 +432,7 @@ struct LongrangeMaker {
track.dcaZ(),
pid);
}
histos.fill(HIST("h3DVtxZetaPhi"), col.posZ(), track.eta(), track.phi());
}

// ft0 loop
Expand Down Expand Up @@ -855,6 +856,7 @@ struct LongrangeMaker {
track.dcaZ(),
pid);
}
histos.fill(HIST("h3DVtxZetaPhi"), RecCol.posZ(), track.eta(), track.phi());
}

// ft0 loop
Expand Down Expand Up @@ -1101,7 +1103,7 @@ struct LongrangeMaker {
float trkeff = 1.0f;
if (cfgtrksel.applyEffCorr)
trkeff = getTrkEffCorr(vz, track.eta(), track.pt());
nTrk += 1.0 / trkeff;
nTrk += trkeff;
}
return nTrk;
}
Expand Down Expand Up @@ -1394,19 +1396,17 @@ struct LongrangeMaker {

float getTrkEffCorr(float posZ, float eta, float pt)
{
float eff = 1.;
if (hTrkEff) {
int zBin = hTrkEff->GetXaxis()->FindBin(posZ);
int etaBin = hTrkEff->GetYaxis()->FindBin(eta);
int ptBin = hTrkEff->GetZaxis()->FindBin(pt);
eff = hTrkEff->GetBinContent(zBin, etaBin, ptBin);
} else {
eff = 1.0;
if (!cfgtrksel.applyEffCorr || !hTrkEff) {
return 1.0;
}
if (eff < cfgtrksel.cfgLowEffCut)
eff = 1.0;

return eff;
int zBin = hTrkEff->GetXaxis()->FindBin(posZ);
int etaBin = hTrkEff->GetYaxis()->FindBin(eta);
int ptBin = hTrkEff->GetZaxis()->FindBin(pt);
float effweight = 1.0 / hTrkEff->GetBinContent(zBin, etaBin, ptBin);
if (!std::isfinite(effweight) || effweight <= 0) {
return 1.0;
}
return effweight;
}

PROCESS_SWITCH(LongrangeMaker, processData, "process All collisions", false);
Expand Down
80 changes: 57 additions & 23 deletions PWGCF/TwoParticleCorrelations/Tasks/longrangecorrDerived.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -87,9 +87,10 @@ struct LongrangecorrDerived {
Configurable<float> cfgTpcMinNCrossedRows{"cfgTpcMinNCrossedRows", 70.0f, ""};
Configurable<float> cfgTpcMaxChi2PerCluster{"cfgTpcMaxChi2PerCluster", 4.0f, ""};
Configurable<float> cfgTpcMaxDcaZ{"cfgTpcMaxDcaZ", 1.0f, ""};
Configurable<float> cfgLowEffCut{"cfgLowEffCut", 0.001f, "Low efficiency cut"};
Configurable<bool> applyEffCorr{"applyEffCorr", true, "Enable efficiency correction"};
Configurable<bool> applyAccCorr{"applyAccCorr", false, "Enable NUA correction"};
Configurable<std::string> cfgEffccdbPath{"cfgEffccdbPath", "Users/a/abmodak/Efficiency/OO/default", "Browse track eff object from CCDB"};
Configurable<std::string> cfgAccccdbPath{"cfgAccccdbPath", "Users/a/abmodak/Acceptance/OO/default", "Browse track eff object from CCDB"};

Configurable<int> cfgMftCluster{"cfgMftCluster", 5, "cut on MFT Cluster"};
Configurable<float> cfgMftDcaxy{"cfgMftDcaxy", 2.0f, "cut on DCA xy for MFT tracks"};
Expand Down Expand Up @@ -148,6 +149,7 @@ struct LongrangecorrDerived {

// corrections
TH3D* hTrkEff = nullptr;
TH3D* hTrkAcc = nullptr;
bool fLoadTrkEffCorr = false;

using CollsTable = aod::LRCollisions;
Expand Down Expand Up @@ -216,6 +218,7 @@ struct LongrangecorrDerived {
histos.add("Trig_eta", "Trig_eta", kTH1D, {cfgAxis.axisEtaTrig});
histos.add("Trig_eta_corrected", "Trig_eta_corrected", kTH1D, {cfgAxis.axisEtaTrig});
histos.add("Trig_phi", "Trig_phi", kTH1D, {cfgAxis.axisPhi});
histos.add("Trig_phi_corrected", "Trig_phi_corrected", kTH1D, {cfgAxis.axisPhi});
histos.add("Trig_etavsphi", "Trig_etavsphi", kTH2D, {cfgAxis.axisPhi, cfgAxis.axisEtaTrig});
histos.add("Trig_pt", "Trig_pt", kTH1D, {cfgAxis.axisPtTrigger});
histos.add("Trig_pt_corrected", "Trig_pt_corrected", kTH1D, {cfgAxis.axisPtTrigger});
Expand Down Expand Up @@ -274,23 +277,46 @@ struct LongrangecorrDerived {
}
LOGF(info, "Loaded efficiency histogram from %s (%p)", cfgSel.cfgEffccdbPath.value.c_str(), (void*)hTrkEff);
}

if (cfgSel.cfgAccccdbPath.value.empty() == false) {
hTrkAcc = ccdb->getForTimeStamp<TH3D>(cfgSel.cfgAccccdbPath, timestamp);
if (hTrkAcc == nullptr) {
LOGF(fatal, "Could not load NUA histogram for trigger particles from %s", cfgSel.cfgAccccdbPath.value.c_str());
}
LOGF(info, "Loaded efficiency histogram from %s (%p)", cfgSel.cfgAccccdbPath.value.c_str(), (void*)hTrkAcc);
}

fLoadTrkEffCorr = true;
}

float getTrkEffCorr(float posZ, float eta, float pt)
{
float eff = 1.0f;
if (hTrkEff) {
int zBin = hTrkEff->GetXaxis()->FindBin(posZ);
int etaBin = hTrkEff->GetYaxis()->FindBin(eta);
int ptBin = hTrkEff->GetZaxis()->FindBin(pt);
eff = hTrkEff->GetBinContent(zBin, etaBin, ptBin);
} else {
eff = 1.0f;
if (!cfgSel.applyEffCorr || !hTrkEff) {
return 1.0;
}
int zBin = hTrkEff->GetXaxis()->FindBin(posZ);
int etaBin = hTrkEff->GetYaxis()->FindBin(eta);
int ptBin = hTrkEff->GetZaxis()->FindBin(pt);
float effweight = 1.0 / hTrkEff->GetBinContent(zBin, etaBin, ptBin);
if (!std::isfinite(effweight) || effweight <= 0) {
return 1.0;
}
return effweight;
}

float getTrkAccCorr(float posZ, float eta, float phi)
{
if (!cfgSel.applyAccCorr || !hTrkAcc) {
return 1.0;
}
if (eff < cfgSel.cfgLowEffCut)
eff = 1.0;
return 1.0 / eff;
int zBin = hTrkAcc->GetXaxis()->FindBin(posZ);
int etaBin = hTrkAcc->GetYaxis()->FindBin(eta);
int phiBin = hTrkAcc->GetZaxis()->FindBin(phi);
float nua = hTrkAcc->GetBinContent(zBin, etaBin, phiBin);
if (!std::isfinite(nua) || nua <= 0) {
return 1.0;
}
return nua;
}

template <typename TTrack>
Expand Down Expand Up @@ -338,12 +364,13 @@ struct LongrangecorrDerived {
}

template <typename TTrack>
void fillTrigTrackQA(TTrack const& track, float trigAmpl, float trkeff)
void fillTrigTrackQA(TTrack const& track, float trigAmpl, float trkeff, float trkAcc)
{
histos.fill(HIST("Trig_etavsphi"), track.phi(), track.eta());
histos.fill(HIST("Trig_eta"), track.eta());
histos.fill(HIST("Trig_eta_corrected"), track.eta(), trkeff);
histos.fill(HIST("Trig_phi"), track.phi());
histos.fill(HIST("Trig_eta_corrected"), track.eta(), trkeff);
histos.fill(HIST("Trig_phi_corrected"), track.phi(), trkAcc);
if constexpr (requires { track.channelID(); }) {
histos.fill(HIST("Trig_amp"), trigAmpl);
histos.fill(HIST("Channel_vs_Trig_amp"), track.channelID(), trigAmpl);
Expand Down Expand Up @@ -419,6 +446,7 @@ struct LongrangecorrDerived {
for (auto const& triggerTrack : triggers) {
auto trigAmpl = 1.0f;
auto trkeff = 1.0f;
auto trkAcc = 1.0f;

if (!isTrackSelected(triggerTrack))
continue;
Expand All @@ -444,19 +472,25 @@ struct LongrangecorrDerived {
if constexpr (step == CorrelationContainer::kCFStepCorrected) {
if constexpr (requires { triggerTrack.trackType(); }) {
trkeff = getTrkEffCorr(vz, triggerTrack.eta(), triggerTrack.pt());
trkAcc = getTrkAccCorr(vz, triggerTrack.eta(), triggerTrack.phi());
} else {
trkeff = 1.0;
trkAcc = 1.0;
}
}

if (cfgSel.cfgVerbosity > 0) {
LOGF(info, "NUE correction factor: %f | NUA correction factor: %f", trkeff, trkAcc);
}

if (!mixing) {
fillTrigTrackQA(triggerTrack, trigAmpl, trkeff);
fillTrigTrackQA(triggerTrack, trigAmpl, trkeff, trkAcc);
if constexpr (requires { triggerTrack.channelID(); }) {
histos.fill(HIST("Trig_hist"), fSampleIndex, vz, multiplicity, 1.0, 1.0, eventWeight * trigAmpl * trkeff);
histos.fill(HIST("Trig_hist"), fSampleIndex, vz, multiplicity, 1.0, 1.0, eventWeight * trigAmpl * trkeff * trkAcc);
} else if constexpr (requires { triggerTrack.invMass(); }) {
histos.fill(HIST("Trig_hist"), fSampleIndex, vz, multiplicity, triggerTrack.pt(), triggerTrack.invMass(), eventWeight * trigAmpl * trkeff);
histos.fill(HIST("Trig_hist"), fSampleIndex, vz, multiplicity, triggerTrack.pt(), triggerTrack.invMass(), eventWeight * trigAmpl * trkeff * trkAcc);
} else {
histos.fill(HIST("Trig_hist"), fSampleIndex, vz, multiplicity, triggerTrack.pt(), 1.0, eventWeight * trigAmpl * trkeff);
histos.fill(HIST("Trig_hist"), fSampleIndex, vz, multiplicity, triggerTrack.pt(), 1.0, eventWeight * trigAmpl * trkeff * trkAcc);
}
}
for (auto const& assoTrack : assocs) {
Expand All @@ -479,16 +513,16 @@ struct LongrangecorrDerived {
float deltaEta = triggerTrack.eta() - assoTrack.eta();
if (!mixing) {
fillAssocTrackQA(assoTrack, assoAmpl);
histos.fill(HIST("deltaEta_deltaPhi_same"), deltaPhi, deltaEta, eventWeight * trigAmpl * assoAmpl * trkeff);
histos.fill(HIST("deltaEta_deltaPhi_same"), deltaPhi, deltaEta, eventWeight * trigAmpl * assoAmpl * trkeff * trkAcc);
} else {
histos.fill(HIST("deltaEta_deltaPhi_mixed"), deltaPhi, deltaEta, eventWeight * trigAmpl * assoAmpl * trkeff);
histos.fill(HIST("deltaEta_deltaPhi_mixed"), deltaPhi, deltaEta, eventWeight * trigAmpl * assoAmpl * trkeff * trkAcc);
}
if constexpr (requires { triggerTrack.channelID(); }) {
target->getPairHist()->Fill(step, fSampleIndex, vz, multiplicity, 1.0, deltaPhi, deltaEta, 1.0, eventWeight * trigAmpl * assoAmpl * trkeff);
target->getPairHist()->Fill(step, fSampleIndex, vz, multiplicity, 1.0, deltaPhi, deltaEta, 1.0, eventWeight * trigAmpl * assoAmpl * trkeff * trkAcc);
} else if constexpr (requires { triggerTrack.invMass(); }) {
target->getPairHist()->Fill(step, fSampleIndex, vz, multiplicity, triggerTrack.pt(), deltaPhi, deltaEta, triggerTrack.invMass(), eventWeight * trigAmpl * assoAmpl * trkeff);
target->getPairHist()->Fill(step, fSampleIndex, vz, multiplicity, triggerTrack.pt(), deltaPhi, deltaEta, triggerTrack.invMass(), eventWeight * trigAmpl * assoAmpl * trkeff * trkAcc);
} else {
target->getPairHist()->Fill(step, fSampleIndex, vz, multiplicity, triggerTrack.pt(), deltaPhi, deltaEta, 1.0, eventWeight * trigAmpl * assoAmpl * trkeff);
target->getPairHist()->Fill(step, fSampleIndex, vz, multiplicity, triggerTrack.pt(), deltaPhi, deltaEta, 1.0, eventWeight * trigAmpl * assoAmpl * trkeff * trkAcc);
}
} // associated tracks
} // trigger tracks
Expand Down
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