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[PWGHF] update track selection and Z-hadron QA in taskElectronWeakBoson #17826

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[PWGHF] update track selection and Z-hadron QA in taskElectronWeakBoson #17826

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3a5cd24
updated to study multiplicity dependence
sashingo Aug 6, 2026
45c3864
fix code-check issues
sashingo Aug 7, 2026
1550055
update track selection and Z-hadron QA
sashingo Sep 8, 2026
ab7c8b5
fix indentation
sashingo Sep 8, 2026
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78 changes: 45 additions & 33 deletions PWGHF/HFL/Tasks/taskElectronWeakBoson.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -76,6 +76,7 @@ struct HfTaskElectronWeakBoson {

Configurable<float> vtxZ{"vtxZ", 10.f, ""};

Configurable<bool> applyTrackSys{"applyTrackSys", false, "apply additional track cuts for systematic study"};
Configurable<float> etaTrMin{"etaTrMin", -1.0f, "minimun track eta"};
Configurable<float> etaTrMax{"etaTrMax", 1.0f, "maximum track eta"};
Configurable<float> etaEmcMax{"etaEmcMax", 0.6f, "maximum track eta"};
Expand Down Expand Up @@ -173,12 +174,12 @@ struct HfTaskElectronWeakBoson {
using SelectedClusters = o2::aod::EMCALClusters;
// PbPb
// using TrackEle = o2::soa::Join<o2::aod::Tracks, o2::aod::FullTracks, o2::aod::TracksExtra, o2::aod::TracksDCA, o2::aod::TrackSelection, o2::aod::pidTPCFullEl>;
using TrackEle = o2::soa::Join<o2::aod::Tracks, o2::aod::TracksCov, o2::aod::FullTracks, o2::aod::TracksExtra, o2::aod::TracksDCA, o2::aod::TrackSelection, o2::aod::pidTPCFullEl>;
using TrackEle = o2::soa::Join<o2::aod::Tracks, o2::aod::TracksCov, o2::aod::FullTracks, o2::aod::TracksExtra, o2::aod::TracksDCA, o2::aod::TrackSelection, o2::aod::pidTPCFullEl, o2::aod::pidTPCFullPi>;

// pp
// using TrackEle = o2::soa::Filtered<o2::soa::Join<o2::aod::Tracks, o2::aod::FullTracks, o2::aod::TracksDCA, o2::aod::TrackSelection, o2::aod::pidTPCEl, o2::aod::pidTOFEl>>;

Filter eventFilter = (applySel8 ? (o2::aod::evsel::sel8 == true) : (o2::aod::evsel::sel8 == o2::aod::evsel::sel8)); // FIXME: both sides of overloaded operator are equivalent
Filter eventFilter = ifnode(as<bool>(applySel8), o2::aod::evsel::sel8 == true, true);
Filter posZFilter = (nabs(o2::aod::collision::posZ) < vtxZ);

Filter etafilter = (aod::track::eta < etaTrMax) && (aod::track::eta > etaTrMin);
Expand All @@ -201,6 +202,7 @@ struct HfTaskElectronWeakBoson {
ConfigurableAxis confaxisIsoEnergy{"confaxisIsoEnergy", {255, 0, 2.0}, "E_{iso}"};
ConfigurableAxis confaxisIsoMomentum{"confaxisIsoMomentum", {255, 0, 2.0}, "p_{iso}"};
ConfigurableAxis confaxisIsoTrack{"confaxisIsoTrack", {25, -0.5, 24.5}, "Isolation Track"};
ConfigurableAxis confaxisDedxTrack{"confaxisDedxTrack", {200, -10, 10}, "dEdx"};
ConfigurableAxis confaxisInvMassZgamma{"confaxisInvMassZgamma", {150, 0, 150}, "M_{ee} (GeV/c^{2})"};
ConfigurableAxis confaxisInvMassZ{"confaxisInvMassZ", {130, 20, 150}, "M_{ee} (GeV/c^{2})"};
ConfigurableAxis confaxisZfrag{"confaxisZfrag", {200, 0, 2.0}, "p_{T,h}/p_{T,Z}"};
Expand Down Expand Up @@ -259,7 +261,7 @@ struct HfTaskElectronWeakBoson {
const AxisSpec axisNsigma{100, -5, 5, "N#sigma"};
const AxisSpec axisNsigmaZneg{100, -5, 5, "N#sigma_{pos}"};
const AxisSpec axisNsigmaZpos{100, -5, 5, "N#sigma_{neg}"};
const AxisSpec axisDedx{150, 0, 150, "dEdx"};
const AxisSpec axisDedx{confaxisDedxTrack, "dEdx"};
const AxisSpec axisE{nBinsE, 0, binEmax, "Energy"};
const AxisSpec axisM02{100, 0, 1, "M02"};
const AxisSpec axisM02neg{100, 0, 1, "M02(neg)"};
Expand Down Expand Up @@ -307,9 +309,10 @@ struct HfTaskElectronWeakBoson {
registry.add("hEventCounterInit", "hEventCounterInit", kTH1D, {axisCounter});
registry.add("hEventCounter", "hEventCounter", kTH1D, {axisCounter});
registry.add("hCentrality", "Centrality distribution", kTH1D, {axisCentrality});
registry.add("hCentMultCorr", "Centrality distribution", kTH2D, {{axisCentrality}, {axisMultFT0}});
registry.add("hMultPV", "multiplicity distribution for PV", kTH1D, {axisMultPV});
registry.add("hMultFT0", "multiplicity distribution for FT0", kTH1D, {axisMultFT0});
registry.add("hCentMultFT0Corr", "Centrality distribution vs. FT0 Mult", kTH2D, {{axisCentrality}, {axisMultFT0}});
registry.add("hCentMultPVCorr", "Centrality distribution vs. PV Mult", kTH2D, {{axisCentrality}, {axisMultPV}});
registry.add("hMultPV", "multiplicity distribution for PV", kTH2D, {{axisZvtx}, {axisMultPV}});
registry.add("hMultFT0", "multiplicity distribution for FT0", kTH2D, {{axisZvtx}, {axisMultFT0}});
registry.add("hMultFT0PV", "multiplicity distribution", kTH2D, {{axisMultFT0}, {axisMultPV}});
registry.add("hITSchi2", "ITS #chi^{2}", kTH1F, {axisChi2});
registry.add("hTPCchi2", "TPC #chi^{2}", kTH1F, {axisChi2});
Expand All @@ -320,6 +323,7 @@ struct HfTaskElectronWeakBoson {
registry.add("hPt", "track pt", kTH1F, {axisPt});
registry.add("hTPCNsigma", "TPC electron Nsigma", kTH2F, {{axisPt}, {axisNsigma}});
registry.add("hEnergy", "EMC cluster energy", kTH1F, {axisE});
registry.add("hEnergyMult", "EMC cluster energy vs Multiplicity", kTH2F, {{axisCentrality}, {axisE}});
registry.add("hEnergyNcell", "EMC cluster energy and cell", kTH2F, {{axisE}, {axisNcell}});
registry.add("hTrMatchR", "Track EMC Match in radius", kTH2F, {{axisPt}, {axisdR}});
registry.add("hTrMatch_mim", "Track EMC Match minimu minimumm", kTH2F, {{axisdPhi}, {axisdEta}});
Expand All @@ -341,7 +345,7 @@ struct HfTaskElectronWeakBoson {
registry.add("hTHnTrMatch", "Track EMC Match", HistType::kTHnSparseF, {axisPt, axisdPhi, axisdEta});

// Z-hadron correlation histograms
registry.add("hZHadronDphi", "Z-hadron #Delta#phi correlation", HistType::kTHnSparseF, {axisCentrality, axisSign, axisPtZ, axisDPhiZh, axisDEtaZh, axisZfrag, axisPtHadron});
registry.add("hZHadronDphi", "Z-hadron #Delta#phi correlation", HistType::kTHnSparseF, {axisCentrality, axisSign, axisPtZ, axisDPhiZh, axisDEtaZh, axisZfrag, axisPtHadron, axisDedx});
registry.add("hZptSpectrum", "Z boson p_{T} spectrum", kTH2F, {{axisSign}, {axisPtZ}});

// hisotgram for EMCal trigger
Expand Down Expand Up @@ -506,10 +510,10 @@ struct HfTaskElectronWeakBoson {
registry.fill(HIST("hInvMassZee"), centrality, track.sign() * charge, kfpIsoEle.GetPt(), invMassEE);

// reco by KFparticle
const KFParticle* electronPairs[2] = {&kfpIsoEle, &kfpAssEle};
std::array<const KFParticle*, 2> electronPairs = {&kfpIsoEle, &kfpAssEle};
KFParticle zeeKF;
zeeKF.SetConstructMethod(kfConstructMethod);
zeeKF.Construct(electronPairs, 2);
zeeKF.Construct(electronPairs.data(), 2);
// LOG(info) << "Invarimass cal by KF particle Chi2/NDF = " << zeeKF.GetChi2()/zeeKF.GetNDF();
float const chiSqNdf = zeeKF.GetChi2() / zeeKF.GetNDF();
if (zeeKF.GetNDF() < 1) {
Expand Down Expand Up @@ -610,18 +614,21 @@ struct HfTaskElectronWeakBoson {
if (centrality < centralityMin || centrality > centralityMax) {
return;
}
registry.fill(HIST("hCentMultCorr"), centrality, collision.multFT0M());
registry.fill(HIST("hCentMultFT0Corr"), centrality, collision.multFT0M());
registry.fill(HIST("hCentMultPVCorr"), centrality, collision.multNTracksPV());
}

if (enableMultiplicityFT0MAnalysis || enableMultiplicityPVAnalysis) {
if (enableMultiplicityFT0MAnalysis)
if (enableMultiplicityFT0MAnalysis) {
centrality = collision.multFT0M();
if (enableMultiplicityPVAnalysis)
}
if (enableMultiplicityPVAnalysis) {
centrality = collision.multNTracksPV();
}
// LOG(info) << "raw mult PV = " << collision.multNTracksPV();
// LOG(info) << "raw mult FT0M = " << collision.multFT0M();
registry.fill(HIST("hMultPV"), collision.multNTracksPV());
registry.fill(HIST("hMultFT0"), collision.multFT0M());
registry.fill(HIST("hMultPV"), collision.posZ(), collision.multNTracksPV());
registry.fill(HIST("hMultFT0"), collision.posZ(), collision.multFT0M());
registry.fill(HIST("hMultFT0PV"), collision.multFT0M(), collision.multNTracksPV());
}

Expand All @@ -641,28 +648,32 @@ struct HfTaskElectronWeakBoson {
// track loop
for (const auto& track : tracks) {

if (std::abs(track.eta()) > etaTrMax) {
continue;
}
if (track.tpcNClsCrossedRows() < nclcrossTpcMin) {
continue;
}
if (std::abs(track.dcaXY()) > dcaxyMax) {
if (!track.isGlobalTrackWoPtEta()) {
continue;
}
if (track.itsChi2NCl() > chi2ItsMax) {
continue;
}
if (track.tpcChi2NCl() > chi2TpcMax) {
continue;
}
if (track.tpcNClsFound() < nclTpcMin) {
if (std::abs(track.eta()) > etaTrMax) {
continue;
}
if (track.itsNCls() < nclItsMin) {
continue;
if (applyTrackSys) {
if (track.tpcNClsCrossedRows() < nclcrossTpcMin) {
continue;
}
if (std::abs(track.dcaXY()) > dcaxyMax) {
continue;
}
if (track.itsChi2NCl() > chi2ItsMax) {
continue;
}
if (track.tpcChi2NCl() > chi2TpcMax) {
continue;
}
if (track.tpcNClsFound() < nclTpcMin) {
continue;
}
if (track.itsNCls() < nclItsMin) {
continue;
}
}

registry.fill(HIST("hEta"), track.eta());
registry.fill(HIST("hITSchi2"), track.itsChi2NCl());
registry.fill(HIST("hTPCchi2"), track.tpcChi2NCl());
Expand All @@ -689,7 +700,7 @@ struct HfTaskElectronWeakBoson {
eop,
isoEnergy,
isoMomentum,
track.tpcNSigmaEl(),
track.tpcNSigmaPi() * track.sign(),
m02,
trackCount,
track.tpcNClsCrossedRows(),
Expand Down Expand Up @@ -752,6 +763,7 @@ struct HfTaskElectronWeakBoson {
registry.fill(HIST("hTHnTrMatch"), match.track_as<TrackEle>().pt(), dPhi, dEta);
registry.fill(HIST("hEMCtime"), timeEmc);
registry.fill(HIST("hEnergy"), energyEmc);
registry.fill(HIST("hEnergyMult"), centrality, energyEmc);

if (std::abs(dPhi) > rMatchMax || std::abs(dEta) > rMatchMax) {
continue;
Expand Down Expand Up @@ -867,7 +879,7 @@ struct HfTaskElectronWeakBoson {
double const deltaPhi = RecoDecay::constrainAngle(trackAss.phi - zBoson.phi, -o2::constants::math::PIHalf);
double const ptRatio = trackAss.pt / zBoson.pt;
double const deltaEta = zBoson.eta - trackAss.eta;
registry.fill(HIST("hZHadronDphi"), centrality, zBoson.charge, zBoson.pt, deltaPhi, deltaEta, ptRatio, trackAss.pt);
registry.fill(HIST("hZHadronDphi"), centrality, zBoson.charge, zBoson.pt, deltaPhi, deltaEta, ptRatio, trackAss.pt, trackAss.dedxTrk);
}
}
} // end of Z-hadron correlation
Expand Down
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