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[PWGHF] Adding purity checks for deuteron from Lb #17304

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Merged
stefanopolitano merged 6 commits into from
Aug 4, 2026
+64 −24
Merged

[PWGHF] Adding purity checks for deuteron from Lb #17304

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9e1514b
PWGHF/D2H: PID selections changed in taskDeuteronFromLb
Jul 10, 2026
85fe02c
Fix DCAxy selection and Errors/Warnings in taskDeuteronFromLb
Jul 16, 2026
482a2ba
Fix for O2 linter warinings
Jul 16, 2026
678a141
Merge branch 'master' into fix/taskDeuteronFromLb-PID
MRazza879 Jul 16, 2026
5140a8a
Adding both purity checks: Data-driven and MC-driven
Aug 3, 2026
984357f
Merge branch 'master' into fix/taskDeuteronFromLb-PID
MRazza879 Aug 3, 2026
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88 changes: 64 additions & 24 deletions PWGHF/D2H/Tasks/taskDeuteronFromLb.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -68,7 +68,6 @@ struct HfTaskDeuteronFromLb {
Configurable<float> cfgMinPt{"cfgMinPt", 0.5f, "Minimum pT cut"};
Configurable<float> cfgTPCNsigma{"cfgTPCNsigma", 3.0f, "TPC n sigma for deuteron PID"};
Configurable<float> cfgTofNsigma{"cfgTofNsigma", 3.0f, "TOF n sigma for deuteron PID"};
Configurable<float> ptThresholdPid{"ptThresholdPid", 0.5f, "pT threshold to switch between TPC and TPC+TOF PID"};
Configurable<float> cfgDCAmin{"cfgDCAmin", 0.05f, "Minimum DCA for deuteron PID"};
Configurable<float> cfgDCAmax{"cfgDCAmax", 1000.0f, "Maximum DCA for deuteron PID"};
Configurable<float> rapidityCut{"rapidityCut", 0.5f, "Rapidity cut"};
Expand All @@ -84,7 +83,7 @@ struct HfTaskDeuteronFromLb {
framework::Service<ccdb::BasicCCDBManager> ccdb{};

using CollisionCandidates = o2::soa::Join<o2::aod::Collisions, o2::aod::EvSels>;
using MCTrackCandidates = o2::soa::Join<o2::aod::TracksIU, o2::aod::TracksExtra, o2::aod::TracksDCA, o2::aod::McTrackLabels>;
using MCTrackCandidates = o2::soa::Join<o2::aod::TracksIU, o2::aod::TracksExtra, o2::aod::TracksDCA, o2::aod::McTrackLabels, o2::aod::pidTPCFullDe, o2::aod::pidTOFFullDe>;
using MCCollisionCandidates = o2::soa::Join<o2::aod::Collisions, o2::aod::EvSels, o2::aod::McCollisionLabels>;
using TrackCandidates = o2::soa::Join<o2::aod::Tracks, o2::aod::TracksCov, o2::aod::TracksExtra, o2::aod::TracksDCA, o2::aod::TrackSelection, o2::aod::pidTPCFullDe, o2::aod::pidTOFFullDe>;

Expand Down Expand Up @@ -154,13 +153,28 @@ struct HfTaskDeuteronFromLb {
qaHistos.add("MCReco/ptAntiDeuteronFromAntiLambdaB",
"p_{T} #bar{d} from #bar{#Lambda}_{b} reco/MC anchored;p_{T} (GeV/c);Counts",
HistType::kTH1F, {ptAxis});
qaHistos.add(
"MCReco/ptAntiDeuteronPrimary",
"p_{T} #bar{d} primary reco/MC anchored;p_{T} (GeV/c);Counts",
HistType::kTH1F,
{ptAxis});
qaHistos.add("MCGen/ptAntiDeuteronFromBminus", "p_{T} #bar{d} from B^{-} gen;p_{T} (GeV/c);Counts", HistType::kTH1F, {ptAxis});
qaHistos.add("MCGen/ptAntiDeuteronFromAntiLambdaB", "p_{T} #bar{d} from #bar{#Lambda}_{b} gen;p_{T} (GeV/c);Counts", HistType::kTH1F, {ptAxis});
qaHistos.add("MCReco/hDCAxy-Primary", "DCAxy primary reco/MC anchored;DCA xy (cm);Counts", {HistType::kTH1D, {{400, -0.2f, 0.2f, "DCA xy (cm)"}}});
qaHistos.add("MCReco/hDCAxy-FromBeautyHadron", "DCAxy from beauty reco/MC anchored;DCA xy (cm);Counts", {HistType::kTH1D, {{400, -0.2f, 0.2f, "DCA xy (cm)"}}});
qaHistos.add("MCReco/hMotherPdgCode", "PDG code of mother, reco/MC anchored;PDG code;Counts", HistType::kTH1I, {{12000, -6000, 6000}});
qaHistos.add("MCReco/ctauBminus", "ctau of B^{-}, reco/MC anchored;ctau (#mu m);Counts", HistType::kTH1F, {{25, 0., 2000.f}});
qaHistos.add("MCReco/ctauAntiLambdaB", "ctau of #bar{#Lambda}_{b}, reco/MC anchored;ctau (#mu m);Counts", HistType::kTH1F, {{25, 0., 2000.f}});
qaHistos.add("MCReco/ptAntiDeuteronPIDSelected", "p_{T} #bar{d} reco/MC anchored PID selection;p_{T} (GeV/c);Counts", HistType::kTH1F, {ptAxis});
qaHistos.add("MCReco/ptAntiDeuteronPIDSelectedTrue", "p_{T} #bar{d} reco/MC anchored PID and PDG;p_{T} (GeV/c);Counts", HistType::kTH1F, {ptAxis});
qaHistos.add("MCReco/hnSigmaTPCVsPt", "n#sigma TPC vs p_{T} for #bar{d} hypothesis for MC; p_{T} (GeV/c); n#sigma TPC", {HistType::kTH2D, {ptAxis, nSigmaAxis}});
qaHistos.add("MCReco/hnSigmaTOFVsPt", "n#sigma TOF vs p_{T} for #bar{d} hypothesis for MC; p_{T} (GeV/c); n#sigma TOF", {HistType::kTH2D, {ptAxis, nSigmaAxis}});
qaHistos.add("Data/hnSigmaTOFVsPtPurity", "n#sigma TOF vs p_{T} for #bar{d} hypothesis for Data-driven purity check; p_{T} (GeV/c); n#sigma TOF", {HistType::kTH2D, {ptAxis, nSigmaAxis}});
qaHistos.add("Data/hnSigmaTPCVsPtPurity", "n#sigma TPC vs p_{T} for #bar{d} hypothesis for Data-driven purity check; p_{T} (GeV/c); n#sigma TPC", {HistType::kTH2D, {ptAxis, nSigmaAxis}});
qaHistos.add("MCReco/ptAntiDeuteronTPCOnlyPIDSelected", "p_{T} #bar{d} reco/MC anchored TPC only PID selection;p_{T} (GeV/c);Counts", HistType::kTH1F, {ptAxis});
qaHistos.add("MCReco/ptAntiDeuteronTPCOnlyPIDSelectedTrue", "p_{T} #bar{d} reco/MC anchored TPC only PID and PDG;p_{T} (GeV/c);Counts", HistType::kTH1F, {ptAxis});
qaHistos.add("MCReco/ptAntiDeuteronTPCorTPCTOFPIDSelected", "p_{T} #bar{d} reco/MC anchored TPC or TPC+TOF PID selection;p_{T} (GeV/c);Counts", HistType::kTH1F, {ptAxis});
qaHistos.add("MCReco/ptAntiDeuteronTPCorTPCTOFPIDSelectedTrue", "p_{T} #bar{d} reco/MC anchored TPC or TPC+TOF PID and PDG;p_{T} (GeV/c);Counts", HistType::kTH1F, {ptAxis});

hProcessedEvents->GetXaxis()->SetBinLabel(1, "Events processed");
hProcessedEvents->GetXaxis()->SetBinLabel(2, "ZORRO");
Expand Down Expand Up @@ -193,9 +207,6 @@ struct HfTaskDeuteronFromLb {
if (!track.hasTPC()) {
return false;
}
if (!track.hasTOF()) {
return false;
}
if (track.tpcNClsFound() < cfgTPCNclsFound) {
return false;
}
Expand Down Expand Up @@ -274,24 +285,20 @@ struct HfTaskDeuteronFromLb {
const bool isTPCDe = std::abs(track.tpcNSigmaDe()) < cfgTPCNsigma;
const bool isTOFDe = std::abs(track.tofNSigmaDe()) < cfgTofNsigma;

if (track.pt() < ptThresholdPid) {
if (isTPCDe) {
qaHistos.fill(HIST("Data/ptAntiDeuteron"), track.pt());
qaHistos.fill(HIST("Data/etaAntideuteron"), track.eta());
qaHistos.fill(HIST("Data/hDCAxyVsPt"), track.pt(), dca[0]);
qaHistos.fill(HIST("Data/hDCAzVsPt"), track.pt(), dca[1]);
qaHistos.fill(HIST("Data/hnSigmaTPCVsPt"), track.pt(), track.tpcNSigmaDe());
qaHistos.fill(HIST("Data/hnSigmaTOFVsPt"), track.pt(), track.tofNSigmaDe());
}
} else {
if (isTPCDe && isTOFDe) {
qaHistos.fill(HIST("Data/ptAntiDeuteron"), track.pt());
qaHistos.fill(HIST("Data/etaAntideuteron"), track.eta());
qaHistos.fill(HIST("Data/hDCAxyVsPt"), track.pt(), dca[0]);
qaHistos.fill(HIST("Data/hDCAzVsPt"), track.pt(), dca[1]);
qaHistos.fill(HIST("Data/hnSigmaTPCVsPt"), track.pt(), track.tpcNSigmaDe());
qaHistos.fill(HIST("Data/hnSigmaTOFVsPt"), track.pt(), track.tofNSigmaDe());
}
if (isTPCDe && track.hasTOF()) {
qaHistos.fill(HIST("Data/hnSigmaTOFVsPtPurity"), track.pt(), track.tofNSigmaDe());
}
if (isTOFDe && track.hasTOF()) {
qaHistos.fill(HIST("Data/hnSigmaTPCVsPtPurity"), track.pt(), track.tpcNSigmaDe());
}

if (isTPCDe && isTOFDe && track.hasTOF()) {
qaHistos.fill(HIST("Data/ptAntiDeuteron"), track.pt());
qaHistos.fill(HIST("Data/etaAntideuteron"), track.eta());
qaHistos.fill(HIST("Data/hDCAxyVsPt"), track.pt(), dca[0]);
qaHistos.fill(HIST("Data/hDCAzVsPt"), track.pt(), dca[1]);
qaHistos.fill(HIST("Data/hnSigmaTPCVsPt"), track.pt(), track.tpcNSigmaDe());
qaHistos.fill(HIST("Data/hnSigmaTOFVsPt"), track.pt(), track.tofNSigmaDe());
}
}
}
Expand All @@ -313,7 +320,40 @@ struct HfTaskDeuteronFromLb {
}

auto mcParticle = track.mcParticle();
if (mcParticle.pdgCode() == pdgCodeDaughter) {
const bool isTrueDeuteron = (mcParticle.pdgCode() == pdgCodeDaughter);
const bool isTPCDe = std::abs(track.tpcNSigmaDe()) < cfgTPCNsigma;
const bool isTOFDe = std::abs(track.tofNSigmaDe()) < cfgTofNsigma;
const bool selTpcOrTpcTof = isTPCDe && (!track.hasTOF() || isTOFDe);

if (isTPCDe) {
qaHistos.fill(HIST("MCReco/ptAntiDeuteronTPCOnlyPIDSelected"), track.pt());
if (isTrueDeuteron) {
qaHistos.fill(HIST("MCReco/ptAntiDeuteronTPCOnlyPIDSelectedTrue"), track.pt());
}
}

if (track.hasTOF()) {
qaHistos.fill(HIST("MCReco/hnSigmaTPCVsPt"), track.pt(), track.tpcNSigmaDe());
qaHistos.fill(HIST("MCReco/hnSigmaTOFVsPt"), track.pt(), track.tofNSigmaDe());
}

if (selTpcOrTpcTof) {
qaHistos.fill(HIST("MCReco/ptAntiDeuteronTPCorTPCTOFPIDSelected"), track.pt());
if (isTrueDeuteron) {
qaHistos.fill(HIST("MCReco/ptAntiDeuteronTPCorTPCTOFPIDSelectedTrue"), track.pt());
}
}

if (isTPCDe && isTOFDe && track.hasTOF()) {
qaHistos.fill(HIST("MCReco/ptAntiDeuteronPIDSelected"), track.pt());
if (isTrueDeuteron) {
qaHistos.fill(HIST("MCReco/ptAntiDeuteronPIDSelectedTrue"), track.pt());
}
} else {
continue;
}

if (isTrueDeuteron) {
if (std::abs(mcParticle.y()) > rapidityCut) {
continue;
}
Expand Down
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