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[PWGCF] Add secondary decay for resonance efficiencies #16329

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[PWGCF] Add secondary decay for resonance efficiencies #16329

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7e0ad46
Add secondary decay for resonance efficiencies
EmilGorm May 20, 2026
3b996ad
Add configurable to toggle TOF requirement for MC reco
EmilGorm May 20, 2026
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51 changes: 48 additions & 3 deletions PWGCF/Flow/Tasks/flowMc.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -100,6 +100,8 @@ struct FlowMc {
O2_DEFINE_CONFIGURABLE(cfgCentVsIPTruth, std::string, "", "CCDB path to centrality vs IP truth")
O2_DEFINE_CONFIGURABLE(cfgIsGlobalTrack, bool, false, "Use global tracks instead of hasTPC&&hasITS")
O2_DEFINE_CONFIGURABLE(cfgK0Lambda0Enabled, bool, false, "Add K0 and Lambda0, for bulk particle efficiency please keep off")
O2_DEFINE_CONFIGURABLE(cfgAcceptSecondaries, bool, false, "Accept secondary particles produced from decays")
O2_DEFINE_CONFIGURABLE(cfgRequireTOF, bool, false, "Require that reconstructed tracks have TOF for resonance decays")
O2_DEFINE_CONFIGURABLE(cfgFlowCumulantEnabled, bool, false, "switch of calculating flow")
O2_DEFINE_CONFIGURABLE(cfgFlowCumulantNbootstrap, int, 30, "Number of subsamples")
O2_DEFINE_CONFIGURABLE(cfgTrackDensityCorrUse, bool, false, "Use track density efficiency correction")
Expand Down Expand Up @@ -238,6 +240,12 @@ struct FlowMc {
histos.add<TH2>("hPtNchGlobalK0", "Global production; pT (GeV/c); multiplicity", HistType::kTH2D, {axisPt, axisNch});
histos.add<TH2>("hPtNchGeneratedLambda", "Reco production; pT (GeV/c); multiplicity", HistType::kTH2D, {axisPt, axisNch});
histos.add<TH2>("hPtNchGlobalLambda", "Global production; pT (GeV/c); multiplicity", HistType::kTH2D, {axisPt, axisNch});
histos.add<TH2>("hPtNchGeneratedK0Pions", "Reco production; pT (GeV/c); multiplicity", HistType::kTH2D, {axisPt, axisNch});
histos.add<TH2>("hPtNchGlobalK0Pions", "Global production; pT (GeV/c); multiplicity", HistType::kTH2D, {axisPt, axisNch});
histos.add<TH2>("hPtNchGeneratedLambdaPions", "Reco production; pT (GeV/c); multiplicity", HistType::kTH2D, {axisPt, axisNch});
histos.add<TH2>("hPtNchGlobalLambdaPions", "Global production; pT (GeV/c); multiplicity", HistType::kTH2D, {axisPt, axisNch});
histos.add<TH2>("hPtNchGeneratedLambdaProtons", "Reco production; pT (GeV/c); multiplicity", HistType::kTH2D, {axisPt, axisNch});
histos.add<TH2>("hPtNchGlobalLambdaProtons", "Global production; pT (GeV/c); multiplicity", HistType::kTH2D, {axisPt, axisNch});
histos.add<TH1>("hPtMCGen", "Monte Carlo Truth; pT (GeV/c);", {HistType::kTH1D, {axisPt}});
histos.add<TH3>("hEtaPtVtxzMCGen", "Monte Carlo Truth; #eta; p_{T} (GeV/c); V_{z} (cm);", {HistType::kTH3D, {axisEta, axisPt, axisVertex}});
histos.add<TH1>("hPtMCGlobal", "Monte Carlo Global; pT (GeV/c);", {HistType::kTH1D, {axisPt}});
Expand Down Expand Up @@ -599,8 +607,13 @@ struct FlowMc {
if (extraPDGType && pdgCode != PDG_t::kElectron && pdgCode != PDG_t::kMuonMinus && pdgCode != PDG_t::kPiPlus && pdgCode != kKPlus && pdgCode != PDG_t::kProton)
continue;

if (!mcParticle.isPhysicalPrimary())
bool isPhysicalPrimary = mcParticle.isPhysicalPrimary();
const int producedByDecay = 4;
bool isSecondary = (mcParticle.has_mothers() && mcParticle.getProcess() == producedByDecay);
bool isAcceptedSecondary = (cfgAcceptSecondaries) ? isSecondary : false;
if (!isPhysicalPrimary && !isAcceptedSecondary)
continue;

if (std::fabs(mcParticle.eta()) > cfgCutEta) // main acceptance
continue;

Expand All @@ -621,11 +634,23 @@ struct FlowMc {
histos.fill(HIST("hPtNchGeneratedK0"), mcParticle.pt(), nChGlobal);
if (pdgCode == PDG_t::kLambda0)
histos.fill(HIST("hPtNchGeneratedLambda"), mcParticle.pt(), nChGlobal);

if (mcParticle.has_daughters()) {
for (const auto& d : mcParticle.template daughters_as<FilteredMcParticles>()) {
if (std::abs(d.pdgCode()) == PDG_t::kPiPlus) {
if (pdgCode == PDG_t::kK0Short)
histos.fill(HIST("hPtNchGeneratedK0Pions"), d.pt(), nChGlobal);
if (pdgCode == PDG_t::kLambda0)
histos.fill(HIST("hPtNchGeneratedLambdaPions"), d.pt(), nChGlobal);
}
if (pdgCode == PDG_t::kLambda0 && std::abs(d.pdgCode()) == PDG_t::kProton)
histos.fill(HIST("hPtNchGeneratedLambdaProtons"), d.pt(), nChGlobal);
}
}
nCh++;

bool validGlobal = false;
bool validTrack = false;
bool validTOFTrack = false;
bool validTPCTrack = false;
bool validITSTrack = false;
bool validITSABTrack = false;
Expand All @@ -643,6 +668,9 @@ struct FlowMc {
if (!cfgIsGlobalTrack && track.hasTPC() && track.hasITS()) {
validGlobal = true;
}
if (track.hasTOF() && validGlobal) {
validTOFTrack = true;
}
if (track.hasTPC() || track.hasITS()) {
validTrack = true;
}
Expand All @@ -657,7 +685,6 @@ struct FlowMc {
}
}
}

bool withinPtRef = (cfgCutPtRefMin < mcParticle.pt()) && (mcParticle.pt() < cfgCutPtRefMax); // within RF pT range
bool withinPtPOI = (cfgCutPtPOIMin < mcParticle.pt()) && (mcParticle.pt() < cfgCutPtPOIMax); // within POI pT range
if (cfgOutputNUAWeights && withinPtRef)
Expand Down Expand Up @@ -723,6 +750,24 @@ struct FlowMc {
histos.fill(HIST("hPtNchGlobalK0"), mcParticle.pt(), nChGlobal);
if (pdgCode == PDG_t::kLambda0)
histos.fill(HIST("hPtNchGlobalLambda"), mcParticle.pt(), nChGlobal);
if (!cfgRequireTOF || (cfgRequireTOF && validTOFTrack)) {
if (mcParticle.has_mothers()) {
for (const auto& m : mcParticle.template mothers_as<FilteredMcParticles>()) {
if (!m.isPhysicalPrimary())
continue;
if (pdgCode == PDG_t::kPiPlus) {
if (m.pdgCode() == PDG_t::kK0Short) {
histos.fill(HIST("hPtNchGlobalK0Pions"), mcParticle.pt(), nChGlobal);
}
if (m.pdgCode() == PDG_t::kLambda0) {
histos.fill(HIST("hPtNchGlobalLambdaPions"), mcParticle.pt(), nChGlobal);
}
}
if (pdgCode == PDG_t::kProton && m.pdgCode() == PDG_t::kLambda0)
histos.fill(HIST("hPtNchGlobalLambdaProtons"), mcParticle.pt(), nChGlobal);
}
}
}
}
// if any track present, fill
if (validTrack)
Expand Down
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