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[PWGHF/D2H] removing di-quark contribution from non-prompt Dstar #16273

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Merged
fgrosa merged 1 commit into from
May 17, 2026
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[PWGHF/D2H] removing di-quark contribution from non-prompt Dstar #16273

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11 changes: 11 additions & 0 deletions PWGHF/D2H/Tasks/taskDstarToD0Pi.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -555,6 +555,11 @@ struct HfTaskDstarToD0Pi {
auto indexMother = RecoDecay::getMother(rowsMcPartilces, prong0.template mcParticle_as<CandDstarMcGen>(), o2::constants::physics::Pdg::kDStar, true, &signDstar, 2);
auto particleMother = rowsMcPartilces.rawIteratorAt(indexMother); // What is difference between rawIterator() or iteratorAt() methods?
auto ptMother = particleMother.pt();
int const pdgBhadMother = candDstarMcRec.pdgBhadMotherPart();
// For unknown reasons there are charm hadrons coming directly from beauty diquarks without an intermediate B-hadron which have an unreasonable correlation between the pT of the charm hadron and the beauty mother. We also remove charm hadrons from quarkonia.
if (candDstarMcRec.originMcRec() == RecoDecay::OriginType::NonPrompt && (pdgBhadMother == 5101 || pdgBhadMother == 5103 || pdgBhadMother == 5201 || pdgBhadMother == 5203 || pdgBhadMother == 5301 || pdgBhadMother == 5303 || pdgBhadMother == 5401 || pdgBhadMother == 5403 || pdgBhadMother == 5503 || pdgBhadMother == 553 || pdgBhadMother == 555 || pdgBhadMother == 557)) { // o2-linter: disable=pdg/explicit-code, magic-number (constants not in the PDG header)
continue;
}
if (qaEnabled) {
registry.fill(HIST("QA/hPtSkimDstarGenSig"), ptMother); // generator level pt
registry.fill(HIST("QA/hPtVsCentSkimDstarGenSig"), ptMother, centrality);
Expand Down Expand Up @@ -745,6 +750,12 @@ struct HfTaskDstarToD0Pi {
auto idxBhadMotherPart = mcParticle.idxBhadMotherPart();
auto bMother = rowsMcPartilces.rawIteratorAt(idxBhadMotherPart);
auto ptBMother = bMother.pt();
int const pdgBhadMother = std::abs(bMother.pdgCode());

// For unknown reasons there are charm hadrons coming directly from beauty diquarks without an intermediate B-hadron which have an unreasonable correlation between the pT of the charm hadron and the beauty mother. We also remove charm hadrons from quarkonia.
if (mcParticle.originMcGen() == RecoDecay::OriginType::NonPrompt && (pdgBhadMother == 5101 || pdgBhadMother == 5103 || pdgBhadMother == 5201 || pdgBhadMother == 5203 || pdgBhadMother == 5301 || pdgBhadMother == 5303 || pdgBhadMother == 5401 || pdgBhadMother == 5403 || pdgBhadMother == 5503 || pdgBhadMother == 553 || pdgBhadMother == 555 || pdgBhadMother == 557)) { // o2-linter: disable=pdg/explicit-code, magic-number (constants not in the PDG header)
continue;
}

auto yGen = RecoDecay::y(mcParticle.pVector(), o2::constants::physics::MassDStar);
if (yCandDstarGenMax >= 0. && std::abs(yGen) > yCandDstarGenMax) {
Expand Down
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