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[PWGHF] add TPC pi/K/p veto study for TOF mismatch in DeuteronFromLbtask #18030

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Merged
stefanopolitano merged 1 commit into from
Sep 28, 2026
Merged

[PWGHF] add TPC pi/K/p veto study for TOF mismatch in DeuteronFromLbtask #18030

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11 changes: 10 additions & 1 deletion PWGHF/D2H/Tasks/taskDeuteronFromLb.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -88,7 +88,7 @@ struct HfTaskDeuteronFromLb {
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, 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>;
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, o2::aod::pidTPCFullPi, o2::aod::pidTPCFullKa, o2::aod::pidTPCFullPr>;

Preslice<o2::aod::TrackAssoc> trackIndicesPerCollision = o2::aod::track_association::collisionId;

Expand Down Expand Up @@ -139,6 +139,7 @@ struct HfTaskDeuteronFromLb {
qaHistos.add("Data/etaAntideuteron", "etaAntideuteron", {HistType::kTH1F, {{100, -1.0f, 1.0f, "eta #bar{d}"}}});
qaHistos.add("Data/hVtxZ", "Z-Vertex distribution after selection;Z (cm)", HistType::kTH1F, {{100, -50, 50}});
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/hnSigmaTOFVsPtPurityVeto", "n#sigma TOF vs p_{T} for #bar{d} hypothesis for Data-driven purity check with TPC veto for pi,K,p; 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("Data/hnSigmaITSVsPt", "n#sigma ITS vs p_{T} for #bar{d} hypothesis, used to clean up the TPC/TOF purity sample; p_{T} (GeV/c); n#sigma ITS", {HistType::kTH2D, {ptAxis, nSigmaAxis}});
// MC generated-level histograms
Expand Down Expand Up @@ -295,6 +296,11 @@ struct HfTaskDeuteronFromLb {

qaHistos.fill(HIST("Data/hnSigmaITSVsPt"), track.pt(), track.itsNSigmaDe());

const bool isTPCDeClean = isTPCDe &&
std::abs(track.tpcNSigmaPi()) > cfgTPCNsigma &&
std::abs(track.tpcNSigmaKa()) > cfgTPCNsigma &&
std::abs(track.tpcNSigmaPr()) > cfgTPCNsigma;

if (track.pt() < ptThresholdforPID) {
if (isITSDe) {
qaHistos.fill(HIST("Data/hnSigmaTPCVsPtPurity"), track.pt(), track.tpcNSigmaDe());
Expand All @@ -303,6 +309,9 @@ struct HfTaskDeuteronFromLb {
if (isTPCDe && track.hasTOF()) {
qaHistos.fill(HIST("Data/hnSigmaTOFVsPtPurity"), track.pt(), track.tofNSigmaDe());
}
if (isTPCDeClean && track.hasTOF()) {
qaHistos.fill(HIST("Data/hnSigmaTOFVsPtPurityVeto"), track.pt(), track.tofNSigmaDe());
}
}

if (track.pt() < ptThresholdforPID && isTPCDe && isITSDe) {
Expand Down
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