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[PWGLF] Add generated k* in sigmaproton task #15095

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Merged
romainschotter merged 1 commit into from
Feb 22, 2026
+63 −9
Merged

[PWGLF] Add generated k* in sigmaproton task #15095

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6 changes: 5 additions & 1 deletion PWGLF/DataModel/LFSigmaProtonTables.h
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Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,9 @@ DECLARE_SOA_COLUMN(NSigmaTOFPr, nSigmaTOFPr, float); //! Number of sigmas for th
DECLARE_SOA_COLUMN(SigmaPDG, sigmaPDG, int); //! PDG code of the Sigma daughter
DECLARE_SOA_COLUMN(DaughterPDG, daughterPDG, int); //! PDG code of the kink daughter
DECLARE_SOA_COLUMN(PrPDG, prPDG, int); //! PDG code of the proton candidate
DECLARE_SOA_COLUMN(SigmaGenPt, sigmaGenPt, float); //! Generated pT of the Sigma candidate
DECLARE_SOA_COLUMN(PrGenPt, prGenPt, float); //! Generated pT of the proton candidate
DECLARE_SOA_COLUMN(GenKStar, genKStar, float); //! Generated k* of the Sigma-Proton pair

} // namespace sigmaproton

Expand All @@ -60,7 +63,8 @@ DECLARE_SOA_TABLE(SigmaProtonMCCands, "AOD", "SIGMAPROTONMCCANDS",
kinkcand::PxDaug, kinkcand::PyDaug, kinkcand::PzDaug, sigmaproton::SigmaDecRad, sigmaproton::SigmaCosPA,
sigmaproton::ChargePr, sigmaproton::PxPr, sigmaproton::PyPr, sigmaproton::PzPr,
sigmaproton::NSigmaTPCPr, sigmaproton::NSigmaTOFPr,
sigmaproton::SigmaPDG, sigmaproton::DaughterPDG, sigmaproton::PrPDG);
sigmaproton::SigmaPDG, sigmaproton::DaughterPDG, sigmaproton::PrPDG,
sigmaproton::SigmaGenPt, sigmaproton::PrGenPt, sigmaproton::GenKStar);

} // namespace o2::aod

Expand Down
66 changes: 58 additions & 8 deletions PWGLF/TableProducer/Strangeness/sigmaProtonCorr.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -180,6 +180,26 @@ struct sigmaProtonCorrTask {
return 0.5 * trackRelK.P();
}

float getKStar(float sigmaPx, float sigmaPy, float sigmaPz, float pxPr, float pyPr, float pzPr)
{
TLorentzVector part1; // Sigma
TLorentzVector part2; // Proton
part1.SetXYZM(sigmaPx, sigmaPy, sigmaPz, o2::constants::physics::MassSigmaMinus);
part2.SetXYZM(pxPr, pyPr, pzPr, o2::constants::physics::MassProton);
trackSum = part1 + part2;
const float beta = trackSum.Beta();
const float betax = beta * std::cos(trackSum.Phi()) * std::sin(trackSum.Theta());
const float betay = beta * std::sin(trackSum.Phi()) * std::sin(trackSum.Theta());
const float betaz = beta * std::cos(trackSum.Theta());
PartOneCMS.SetXYZM(part1.Px(), part1.Py(), part1.Pz(), part1.M());
PartTwoCMS.SetXYZM(part2.Px(), part2.Py(), part2.Pz(), part2.M());
const ROOT::Math::Boost boostPRF = ROOT::Math::Boost(-betax, -betay, -betaz);
PartOneCMS = boostPRF(PartOneCMS);
PartTwoCMS = boostPRF(PartTwoCMS);
trackRelK = PartOneCMS - PartTwoCMS;
return 0.5 * trackRelK.P();
}

template <typename Ttrack>
bool selectPrTrack(const Ttrack& candidate)
{
Expand Down Expand Up @@ -410,9 +430,22 @@ struct sigmaProtonCorrTask {
auto mcLabelSigma = tracks.rawIteratorAt(candidate.sigmaID);
auto mcLabelSigmaDau = tracks.rawIteratorAt(candidate.kinkDauID);
auto mcLabelPr = tracks.rawIteratorAt(candidate.prID);
auto pdgSigma = mcLabelSigma.has_mcParticle() ? mcLabelSigma.mcParticle_as<aod::McParticles>().pdgCode() : -999;
auto pdgSigmaDau = mcLabelSigmaDau.has_mcParticle() ? mcLabelSigmaDau.mcParticle_as<aod::McParticles>().pdgCode() : -999;
auto pdgPr = mcLabelPr.has_mcParticle() ? mcLabelPr.mcParticle_as<aod::McParticles>().pdgCode() : -999;

if (!mcLabelSigma.has_mcParticle() || !mcLabelSigmaDau.has_mcParticle() || !mcLabelPr.has_mcParticle()) {
continue; // Skip candidates where MC truth is not available
}

auto mcPartSigma = mcLabelSigma.mcParticle_as<aod::McParticles>();
auto mcPartSigmaDau = mcLabelSigmaDau.mcParticle_as<aod::McParticles>();
auto mcPartPr = mcLabelPr.mcParticle_as<aod::McParticles>();
auto pdgSigma = mcPartSigma.pdgCode();
auto pdgSigmaDau = mcLabelSigmaDau.has_mcParticle() ? mcPartSigmaDau.pdgCode() : -999;
auto pdgPr = mcLabelPr.has_mcParticle() ? mcPartPr.pdgCode() : -999;

float sigmaPtGen = std::hypot(mcPartSigma.px(), mcPartSigma.py());
float prPtGen = std::hypot(mcPartPr.px(), mcPartPr.py());
float kStarGen = getKStar(mcPartSigma.px(), mcPartSigma.py(), mcPartSigma.pz(), mcPartPr.px(), mcPartPr.py(), mcPartPr.pz());

outputDataTableMC(candidate.sigmaCharge,
candidate.sigmaPx,
candidate.sigmaPy,
Expand All @@ -430,7 +463,10 @@ struct sigmaProtonCorrTask {
candidate.nSigmaTOFPr,
pdgSigma,
pdgSigmaDau,
pdgPr);
pdgPr,
sigmaPtGen,
prPtGen,
kStarGen);
}
}
}
Expand Down Expand Up @@ -462,9 +498,20 @@ struct sigmaProtonCorrTask {
auto mcLabelSigma = tracks.rawIteratorAt(candidate.sigmaID);
auto mcLabelSigmaDau = tracks.rawIteratorAt(candidate.kinkDauID);
auto mcLabelPr = tracks.rawIteratorAt(candidate.prID);
auto pdgSigma = mcLabelSigma.has_mcParticle() ? mcLabelSigma.mcParticle_as<aod::McParticles>().pdgCode() : -999;
auto pdgSigmaDau = mcLabelSigmaDau.has_mcParticle() ? mcLabelSigmaDau.mcParticle_as<aod::McParticles>().pdgCode() : -999;
auto pdgPr = mcLabelPr.has_mcParticle() ? mcLabelPr.mcParticle_as<aod::McParticles>().pdgCode() : -999;

if (!mcLabelSigma.has_mcParticle() || !mcLabelSigmaDau.has_mcParticle() || !mcLabelPr.has_mcParticle()) {
continue; // Skip candidates where MC truth is not available
}

auto mcPartSigma = mcLabelSigma.mcParticle_as<aod::McParticles>();
auto mcPartSigmaDau = mcLabelSigmaDau.mcParticle_as<aod::McParticles>();
auto mcPartPr = mcLabelPr.mcParticle_as<aod::McParticles>();
auto pdgSigma = mcPartSigma.pdgCode();
auto pdgSigmaDau = mcLabelSigmaDau.has_mcParticle() ? mcPartSigmaDau.pdgCode() : -999;
auto pdgPr = mcLabelPr.has_mcParticle() ? mcPartPr.pdgCode() : -999;
float sigmaPtGen = std::hypot(mcPartSigma.px(), mcPartSigma.py());
float prPtGen = std::hypot(mcPartPr.px(), mcPartPr.py());
float kStarGen = getKStar(mcPartSigma.px(), mcPartSigma.py(), mcPartSigma.pz(), mcPartPr.px(), mcPartPr.py(), mcPartPr.pz());
outputDataTableMC(candidate.sigmaCharge,
candidate.sigmaPx,
candidate.sigmaPy,
Expand All @@ -482,7 +529,10 @@ struct sigmaProtonCorrTask {
candidate.nSigmaTOFPr,
pdgSigma,
pdgSigmaDau,
pdgPr);
pdgPr,
sigmaPtGen,
prPtGen,
kStarGen);
}
}
}
Expand Down
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