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[PWGHF] Add B hadron selections in dataCreatorCharmHadPReduced #17986

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Merged
fgrosa merged 1 commit into from
Sep 20, 2026
+58 −11
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[PWGHF] Add B hadron selections in dataCreatorCharmHadPReduced #17986

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69 changes: 58 additions & 11 deletions PWGHF/D2H/TableProducer/dataCreatorCharmHadPiReduced.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -196,6 +196,11 @@ struct HfDataCreatorCharmHadPiReduced {
Configurable<std::vector<double>> binsPtPion{"binsPtPion", std::vector<double>{hf_cuts_single_track::vecBinsPtTrack}, "track pT bin limits for pion DCA XY pT-dependent cut"};
Configurable<LabeledArray<double>> cutsTrackPionDCA{"cutsTrackPionDCA", {hf_cuts_single_track::CutsTrack[0], hf_cuts_single_track::NBinsPtTrack, hf_cuts_single_track::NCutVarsTrack, hf_cuts_single_track::labelsPtTrack, hf_cuts_single_track::labelsCutVarTrack}, "Single-track selections per pT bin for pions"};
} trackPionConfigurations;
// B hadron selection
struct : o2::framework::ConfigurableGroup {
Configurable<double> cpaMin{"cpaMin", 0., "Minimum cosine of pointing angle for B candidates"};
Configurable<double> decLenMin{"decLenMin", 0., "Minimum decay length for B candidates"};
} bhadronConfigurations;
// HF flags
struct : o2::framework::ConfigurableGroup {
Configurable<int> selectionFlagDplus{"selectionFlagDplus", 7, "Selection Flag for D+"};
Expand Down Expand Up @@ -272,7 +277,7 @@ struct HfDataCreatorCharmHadPiReduced {
PresliceUnsorted<CollisionsWCentAndMcLabels> colPerMcCollision = aod::mccollisionlabel::mcCollisionId;
} preslices;

std::shared_ptr<TH1> hCandidatesD0, hCandidatesDPlus, hCandidatesDs, hCandidatesLc, hCandidatesD0FromDstar;
std::shared_ptr<TH1> hCandidatesD0, hCandidatesDPlus, hCandidatesDs, hCandidatesLc, hCandidatesD0FromDstar, hCandidatesBHadron;
HistogramRegistry registry{"registry"};
OutputObj<ZorroSummary> zorroSummary{"zorroSummary"};

Expand Down Expand Up @@ -311,6 +316,15 @@ struct HfDataCreatorCharmHadPiReduced {
invMass2ChHadPiMax = (massB + configs.invMassWindowCharmHadPi) * (massB + configs.invMassWindowCharmHadPi);

// Initialize fitter
// D0 + B hadrons
df2.setPropagateToPCA(vertexConfigurations.propagateToPCA);
df2.setMaxR(vertexConfigurations.maxR);
df2.setMaxDZIni(vertexConfigurations.maxDZIni);
df2.setMinParamChange(vertexConfigurations.minParamChange);
df2.setMinRelChi2Change(vertexConfigurations.minRelChi2Change);
df2.setUseAbsDCA(vertexConfigurations.useAbsDCA);
df2.setWeightedFinalPCA(vertexConfigurations.useWeightedFinalPCA);
df2.setMatCorrType(noMatCorr);
if (doprocessDplusPiData || doprocessDplusPiDataWithMl || doprocessDplusPiDataWithQvec || doprocessDplusPiDataWithMlAndQvec || doprocessDplusPiMc || doprocessDplusPiMcWithMl ||
doprocessDsPiData || doprocessDsPiDataWithMl || doprocessDsPiDataWithQvec || doprocessDsPiDataWithMlAndQvec || doprocessDsPiMc || doprocessDsPiMcWithMl ||
doprocessLcPiData || doprocessLcPiDataWithMl || doprocessLcPiMc || doprocessLcPiMcWithMl) {
Expand All @@ -322,16 +336,6 @@ struct HfDataCreatorCharmHadPiReduced {
df3.setUseAbsDCA(vertexConfigurations.useAbsDCA);
df3.setWeightedFinalPCA(vertexConfigurations.useWeightedFinalPCA);
df3.setMatCorrType(noMatCorr);
} else if (doprocessD0PiData || doprocessD0PiDataWithMl || doprocessD0PiDataWithQvec || doprocessD0PiDataWithMlAndQvec || doprocessD0PiMc || doprocessD0PiMcWithMl ||
doprocessDstarPiData || doprocessDstarPiDataWithMl || doprocessDstarPiDataWithQvec || doprocessDstarPiDataWithMlAndQvec || doprocessDstarPiMc || doprocessDstarPiMcWithMl) {
df2.setPropagateToPCA(vertexConfigurations.propagateToPCA);
df2.setMaxR(vertexConfigurations.maxR);
df2.setMaxDZIni(vertexConfigurations.maxDZIni);
df2.setMinParamChange(vertexConfigurations.minParamChange);
df2.setMinRelChi2Change(vertexConfigurations.minRelChi2Change);
df2.setUseAbsDCA(vertexConfigurations.useAbsDCA);
df2.setWeightedFinalPCA(vertexConfigurations.useWeightedFinalPCA);
df2.setMatCorrType(noMatCorr);
}

// Configure CCDB access
Expand Down Expand Up @@ -389,12 +393,14 @@ struct HfDataCreatorCharmHadPiReduced {
hCandidatesDs = registry.add<TH1>("hCandidatesDs", "Ds candidate counter", {HistType::kTH1D, {axisCands}});
hCandidatesLc = registry.add<TH1>("hCandidatesLc", "Lc candidate counter", {HistType::kTH1D, {axisCands}});
hCandidatesD0FromDstar = registry.add<TH1>("hCandidatesD0FromDstar", "D0 from D* candidate counter", {HistType::kTH1D, {axisCands}});
hCandidatesBHadron = registry.add<TH1>("hCandidatesBHadron", "B hadron candidate counter", {HistType::kTH1D, {axisCands}});

setLabelHistoCands(hCandidatesD0);
setLabelHistoCands(hCandidatesDPlus);
setLabelHistoCands(hCandidatesDs);
setLabelHistoCands(hCandidatesLc);
setLabelHistoCands(hCandidatesD0FromDstar);
setLabelHistoCands(hCandidatesBHadron);

// init HF event selection helper
hfEvSel.init(registry, &zorroSummary);
Expand Down Expand Up @@ -1017,6 +1023,26 @@ struct HfDataCreatorCharmHadPiReduced {
}
}

/// B hadron preselections
/// \param momentum is the B meson momentum
/// \param secondaryVertex is the reconstructed secondary vertex
/// \param collision is the reconstructed collision
template <typename T1, typename T2, typename T3>
bool isBHadronSelected(const T1& momentum, const T2& secondaryVertex, const T3& collision)
{
// B candidate CPA
if (RecoDecay::cpa(std::array{collision.posX(), collision.posY(), collision.posZ()}, secondaryVertex, momentum) < bhadronConfigurations.cpaMin) {
return false;
}

// B candidate decay length
if (RecoDecay::distance(std::array{collision.posX(), collision.posY(), collision.posZ()}, secondaryVertex) < bhadronConfigurations.decLenMin) {
return false;
}

return true;
}

template <bool DoMc, bool WithMl, uint8_t DecChannel, bool WithQvec, typename PParticles, typename TTracks, typename CCharmCands, typename Coll, typename BBCs>
void runDataCreation(Coll const& collision,
CCharmCands const& candsC,
Expand Down Expand Up @@ -1307,12 +1333,33 @@ struct HfDataCreatorCharmHadPiReduced {
}

registry.fill(HIST("hPtPion"), trackParCovPion.getPt());

// compute invariant mass square and apply selection
auto invMass2DPi = RecoDecay::m2(std::array{pVecCharm, pVecPion}, std::array{massC, MassPiPlus});
if ((invMass2DPi < invMass2ChHadPiMin) || (invMass2DPi > invMass2ChHadPiMax)) {
continue;
}

std::array<float, 3> pVecBHad{}, pVecDHad{}, pVecDau{};

hCandidatesBHadron->Fill(SVFitting::BeforeFit);
try {
if (df2.process(trackParCovCharmHad, trackParCovPion) == 0) {
continue;
}
} catch (const std::runtime_error& error) {
LOG(info) << "Run time error found: " << error.what() << ". DCAFitterN cannot work, skipping the candidate.";
hCandidatesBHadron->Fill(SVFitting::Fail);
continue;
}
hCandidatesBHadron->Fill(SVFitting::FitOk);
auto secondaryVertexBHad = df2.getPCACandidate();
df2.getTrack(0).getPxPyPzGlo(pVecDHad);
df2.getTrack(1).getPxPyPzGlo(pVecDau);
pVecBHad = RecoDecay::pVec(pVecDHad, pVecDau);
if (!isBHadronSelected(pVecBHad, secondaryVertexBHad, collision)) {
continue;
}
// fill Pion tracks table
// if information on track already stored, go to next track
if (!selectedTracksPion.count(trackPion.globalIndex())) {
Expand Down
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