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[PWGLF] Added L* MC information to the sigmaanalysis task #17657

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Merged
romainschotter merged 3 commits into from
Aug 29, 2026
+184 −35
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[PWGLF] Added L* MC information to the sigmaanalysis task #17657

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bbd2fa3
Added L* MC information to the sigmaanalysis task
Oussama3030 Aug 28, 2026
57d6c62
added a guard against arm 3d histos
Oussama3030 Aug 28, 2026
24aa75c
adressed linter
Oussama3030 Aug 28, 2026
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32 changes: 32 additions & 0 deletions PWGLF/DataModel/LFSigmaTables.h
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Original file line number Diff line number Diff line change
Expand Up @@ -38,7 +38,7 @@
DECLARE_SOA_COLUMN(X, x, float);
DECLARE_SOA_COLUMN(Y, y, float);
DECLARE_SOA_COLUMN(Z, z, float);
DECLARE_SOA_COLUMN(DCADaughters, dcadaughters, float);

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[name/o2-column] 

Use UpperCamelCase for names of O2 columns and matching lowerCamelCase names for their getters.

DECLARE_SOA_COLUMN(PhotonPx, photonPx, float);
DECLARE_SOA_COLUMN(PhotonPy, photonPy, float);
Expand All @@ -49,7 +49,7 @@
DECLARE_SOA_COLUMN(LambdaPy, lambdaPy, float);
DECLARE_SOA_COLUMN(LambdaPz, lambdaPz, float);
DECLARE_SOA_COLUMN(LambdaMass, lambdaMass, float);
DECLARE_SOA_COLUMN(AntiLambdaMass, antilambdaMass, float);

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[name/o2-column] 

Use UpperCamelCase for names of O2 columns and matching lowerCamelCase names for their getters.

//______________________________________________________
// DYNAMIC COLUMNS
Expand Down Expand Up @@ -100,20 +100,36 @@
DECLARE_SOA_DYNAMIC_COLUMN(Radius, radius, //! Sigma0 decay radius (2D, centered at zero)
[](float x, float y) -> float { return RecoDecay::sqrtSumOfSquares(x, y); });

DECLARE_SOA_DYNAMIC_COLUMN(OPAngle, opAngle,

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[name/o2-column] 

Use UpperCamelCase for names of O2 columns and matching lowerCamelCase names for their getters.
[](float photonPx, float photonPy, float photonPz, float lambdaPx, float lambdaPy, float lambdaPz) {
TVector3 v1(photonPx, photonPy, photonPz);
TVector3 v2(lambdaPx, lambdaPy, lambdaPz);
return v1.Angle(v2);
});

// Armenteros-Podolanski variables (photon = positive daughter, lambda = negative daughter)
DECLARE_SOA_DYNAMIC_COLUMN(LStarAlpha, lStarAlpha, //! Armenteros Alpha
[](float photonPx, float photonPy, float photonPz, float lambdaPx, float lambdaPy, float lambdaPz) -> float {
float momTot = RecoDecay::p(photonPx + lambdaPx, photonPy + lambdaPy, photonPz + lambdaPz);
float lQlNeg = RecoDecay::dotProd(std::array{lambdaPx, lambdaPy, lambdaPz}, std::array{photonPx + lambdaPx, photonPy + lambdaPy, photonPz + lambdaPz}) / momTot;
float lQlPos = RecoDecay::dotProd(std::array{photonPx, photonPy, photonPz}, std::array{photonPx + lambdaPx, photonPy + lambdaPy, photonPz + lambdaPz}) / momTot;
return (lQlPos - lQlNeg) / (lQlPos + lQlNeg);
});

DECLARE_SOA_DYNAMIC_COLUMN(LStarQtArm, lStarQtarm, //! Armenteros Qt

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[name/o2-column] 

Use UpperCamelCase for names of O2 columns and matching lowerCamelCase names for their getters.
[](float photonPx, float photonPy, float photonPz, float lambdaPx, float lambdaPy, float lambdaPz) -> float {
float momTot = RecoDecay::p2(photonPx + lambdaPx, photonPy + lambdaPy, photonPz + lambdaPz);
float dp = RecoDecay::dotProd(std::array{lambdaPx, lambdaPy, lambdaPz}, std::array{photonPx + lambdaPx, photonPy + lambdaPy, photonPz + lambdaPz});
return std::sqrt(RecoDecay::p2(lambdaPx, lambdaPy, lambdaPz) - dp * dp / momTot); // qtarm
});

// Photon
DECLARE_SOA_DYNAMIC_COLUMN(PhotonPt, photonPt, //! Transverse momentum in GeV/c
[](float photonPx, float photonPy) -> float {
return RecoDecay::sqrtSumOfSquares(photonPx, photonPy);
});

DECLARE_SOA_DYNAMIC_COLUMN(PhotonP, photonp, //! Total momentum in GeV/c

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[name/o2-column] 

Use UpperCamelCase for names of O2 columns and matching lowerCamelCase names for their getters.
[](float photonPx, float photonPy, float photonPz) -> float {
return RecoDecay::sqrtSumOfSquares(photonPx, photonPy, photonPz);
});
Expand All @@ -137,7 +153,7 @@
return RecoDecay::sqrtSumOfSquares(lambdaPx, lambdaPy);
});

DECLARE_SOA_DYNAMIC_COLUMN(LambdaP, lambdap, //! Total momentum in GeV/c

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[name/o2-column] 

Use UpperCamelCase for names of O2 columns and matching lowerCamelCase names for their getters.
[](float lambdaPx, float lambdaPy, float lambdaPz) -> float {
return RecoDecay::sqrtSumOfSquares(lambdaPx, lambdaPy, lambdaPz);
});
Expand Down Expand Up @@ -179,6 +195,8 @@
sigma0Core::Eta<sigma0Core::PhotonPx, sigma0Core::PhotonPy, sigma0Core::PhotonPz, sigma0Core::LambdaPx, sigma0Core::LambdaPy, sigma0Core::LambdaPz>,
sigma0Core::Radius<sigma0Core::X, sigma0Core::Y>,
sigma0Core::OPAngle<sigma0Core::PhotonPx, sigma0Core::PhotonPy, sigma0Core::PhotonPz, sigma0Core::LambdaPx, sigma0Core::LambdaPy, sigma0Core::LambdaPz>,
sigma0Core::LStarAlpha<sigma0Core::PhotonPx, sigma0Core::PhotonPy, sigma0Core::PhotonPz, sigma0Core::LambdaPx, sigma0Core::LambdaPy, sigma0Core::LambdaPz>,
sigma0Core::LStarQtArm<sigma0Core::PhotonPx, sigma0Core::PhotonPy, sigma0Core::PhotonPz, sigma0Core::LambdaPx, sigma0Core::LambdaPy, sigma0Core::LambdaPz>,

sigma0Core::PhotonPt<sigma0Core::PhotonPx, sigma0Core::PhotonPy>,
sigma0Core::PhotonP<sigma0Core::PhotonPx, sigma0Core::PhotonPy, sigma0Core::PhotonPz>,
Expand Down Expand Up @@ -656,6 +674,12 @@
DECLARE_SOA_DYNAMIC_COLUMN(IsAntiSigma0, isAntiSigma0, //! IsASigma0
[](int pdgCode) -> bool { return pdgCode == PDG_t::kSigma0Bar; }); //-3212

DECLARE_SOA_DYNAMIC_COLUMN(IsLambdaStar, isLambdaStar, //! IsLambdaStar
[](int pdgCode) -> bool { return pdgCode == 3124; }); // PYTHIA8 code for Lambda(1520)

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.

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[pdg/explicit-code] 

Avoid hard-coded PDG codes. Use named values from PDG_t or o2::constants::physics::Pdg instead.

DECLARE_SOA_DYNAMIC_COLUMN(IsAntiLambdaStar, isAntiLambdaStar, //! IsAntiLambdaStar
[](int pdgCode) -> bool { return pdgCode == -3124; }); // PYTHIA8 code for AntiLambda(1520)

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[pdg/explicit-code] 

Avoid hard-coded PDG codes. Use named values from PDG_t or o2::constants::physics::Pdg instead.

DECLARE_SOA_DYNAMIC_COLUMN(MCPx, mcpx, //! Sigma0 px
[](float photonMCPx, float lambdaMCPx) -> float { return photonMCPx + lambdaMCPx; });
DECLARE_SOA_DYNAMIC_COLUMN(MCPy, mcpy, //! Sigma0 py
Expand Down Expand Up @@ -686,6 +710,11 @@
return RecoDecay::y(std::array{photonMCPx + lambdaMCPx, photonMCPy + lambdaMCPy, photonMCPz + lambdaMCPz}, o2::constants::physics::MassSigma0);
});

DECLARE_SOA_DYNAMIC_COLUMN(LambdaStarMCY, lambdaStarMCY,
[](float photonMCPx, float photonMCPy, float photonMCPz, float lambdaMCPx, float lambdaMCPy, float lambdaMCPz) -> float {
return RecoDecay::y(std::array{photonMCPx + lambdaMCPx, photonMCPy + lambdaMCPy, photonMCPz + lambdaMCPz}, o2::constants::physics::MassLambda1520);
});

DECLARE_SOA_DYNAMIC_COLUMN(MCPhi, mcphi, //! Phi in the range [0, 2pi)
[](float photonMCPx, float photonMCPy, float lambdaMCPx, float lambdaMCPy) -> float { return RecoDecay::phi(photonMCPx + lambdaMCPx, photonMCPy + lambdaMCPy); });

Expand Down Expand Up @@ -767,6 +796,8 @@
// Dynamic columns
sigma0MCCore::IsSigma0<sigma0MCCore::PDGCode>,
sigma0MCCore::IsAntiSigma0<sigma0MCCore::PDGCode>,
sigma0MCCore::IsLambdaStar<sigma0MCCore::PDGCode>,
sigma0MCCore::IsAntiLambdaStar<sigma0MCCore::PDGCode>,

sigma0MCCore::MCPx<sigma0MCCore::PhotonMCPx, sigma0MCCore::LambdaMCPx>,
sigma0MCCore::MCPy<sigma0MCCore::PhotonMCPy, sigma0MCCore::LambdaMCPy>,
Expand All @@ -775,6 +806,7 @@
sigma0MCCore::MCP<sigma0MCCore::PhotonMCPx, sigma0MCCore::PhotonMCPy, sigma0MCCore::PhotonMCPz, sigma0MCCore::LambdaMCPx, sigma0MCCore::LambdaMCPy, sigma0MCCore::LambdaMCPz>,
sigma0MCCore::Sigma0MCMass<sigma0MCCore::PhotonMCPx, sigma0MCCore::PhotonMCPy, sigma0MCCore::PhotonMCPz, sigma0MCCore::LambdaMCPx, sigma0MCCore::LambdaMCPy, sigma0MCCore::LambdaMCPz>,
sigma0MCCore::Sigma0MCY<sigma0MCCore::PhotonMCPx, sigma0MCCore::PhotonMCPy, sigma0MCCore::PhotonMCPz, sigma0MCCore::LambdaMCPx, sigma0MCCore::LambdaMCPy, sigma0MCCore::LambdaMCPz>,
sigma0MCCore::LambdaStarMCY<sigma0MCCore::PhotonMCPx, sigma0MCCore::PhotonMCPy, sigma0MCCore::PhotonMCPz, sigma0MCCore::LambdaMCPx, sigma0MCCore::LambdaMCPy, sigma0MCCore::LambdaMCPz>,
sigma0MCCore::MCPhi<sigma0MCCore::PhotonMCPx, sigma0MCCore::PhotonMCPy, sigma0MCCore::LambdaMCPx, sigma0MCCore::LambdaMCPy>,
sigma0MCCore::MCEta<sigma0MCCore::PhotonMCPx, sigma0MCCore::PhotonMCPy, sigma0MCCore::PhotonMCPz, sigma0MCCore::LambdaMCPx, sigma0MCCore::LambdaMCPy, sigma0MCCore::LambdaMCPz>,
sigma0MCCore::MCOPAngle<sigma0MCCore::PhotonMCPx, sigma0MCCore::PhotonMCPy, sigma0MCCore::PhotonMCPz, sigma0MCCore::LambdaMCPx, sigma0MCCore::LambdaMCPy, sigma0MCCore::LambdaMCPz>,
Expand Down
30 changes: 18 additions & 12 deletions PWGLF/TableProducer/Strangeness/sigma0builder.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -841,6 +841,8 @@ struct sigma0builder {
bool IsSigma0 = false;
bool IsAntiSigma0 = false;
bool IsKStar = false;
bool IsLambdaStar = false;
bool IsAntiLambdaStar = false;
bool IsProducedByGenerator = false;
bool IsSterile = false;
int MCProcess = -1;
Expand Down Expand Up @@ -914,8 +916,9 @@ struct sigma0builder {
auto v02MC = v02.template v0MCCore_as<soa::Join<aod::V0MCCores, aod::V0MCCollRefs>>();

// Sanity check: Is V0Pair <-> Mother assignment correct?
int expectedPairPDG = doLambdaStar ? 3124 : PDG_t::kSigma0;
bool fIsSigma0 = false;
if ((v01MC.pdgCode() == PDG_t::kGamma) && (v01MC.pdgCodeMother() == PDG_t::kSigma0) && (v02MC.pdgCode() == PDG_t::kLambda0) && (v02MC.pdgCodeMother() == PDG_t::kSigma0) && (v01.motherMCPartId() == v02.motherMCPartId()))
if ((v01MC.pdgCode() == PDG_t::kGamma) && (v01MC.pdgCodeMother() == expectedPairPDG) && (v02MC.pdgCode() == PDG_t::kLambda0) && (v02MC.pdgCodeMother() == expectedPairPDG) && (v01.motherMCPartId() == v02.motherMCPartId()))
fIsSigma0 = true;

bool fIsKStar = false;
Expand Down Expand Up @@ -1066,11 +1069,11 @@ struct sigma0builder {
}
}
// Check association correctness
if (fIsSigma0 && (MCinfo.V0PairPDGCode == PDG_t::kSigma0))
if (fIsSigma0 && (MCinfo.V0PairPDGCode == expectedPairPDG))
histos.fill(HIST("MCQA/hSigma0MCCheck"), 1); // match
if (fIsSigma0 && !(MCinfo.V0PairPDGCode == PDG_t::kSigma0))
if (fIsSigma0 && !(MCinfo.V0PairPDGCode == expectedPairPDG))
histos.fill(HIST("MCQA/hSigma0MCCheck"), 2); // mismatch
if (!fIsSigma0 && (MCinfo.V0PairPDGCode == PDG_t::kSigma0))
if (!fIsSigma0 && (MCinfo.V0PairPDGCode == expectedPairPDG))
histos.fill(HIST("MCQA/hSigma0MCCheck"), 3); // mismatch

// Check association correctness
Expand Down Expand Up @@ -1627,6 +1630,8 @@ struct sigma0builder {
GenInfo.IsSigma0 = mcParticle.pdgCode() == PDG_t::kSigma0; // PDG_t::kSigma0
GenInfo.IsAntiSigma0 = mcParticle.pdgCode() == PDG_t::kSigma0Bar; //-3212
GenInfo.IsKStar = std::abs(mcParticle.pdgCode()) == o2::constants::physics::Pdg::kK0Star892; // 313;
GenInfo.IsLambdaStar = mcParticle.pdgCode() == 3124; // 102134 (PYTHIA8)
GenInfo.IsAntiLambdaStar = mcParticle.pdgCode() == -3124; // -102134
GenInfo.IsProducedByGenerator = mcParticle.producedByGenerator();
GenInfo.MCProcess = mcParticle.getProcess();
GenInfo.MCPt = mcParticle.pt();
Expand All @@ -1637,7 +1642,7 @@ struct sigma0builder {
GenInfo.MCCollId = mcParticle.mcCollisionId(); // save this reference, please

// Checking decay mode if sigma0 or pi0 (it is easier here)
if (GenInfo.IsSigma0 || GenInfo.IsAntiSigma0 || GenInfo.IsPi0 || GenInfo.IsKStar) {
if (GenInfo.IsSigma0 || GenInfo.IsAntiSigma0 || GenInfo.IsPi0 || GenInfo.IsKStar || GenInfo.IsLambdaStar || GenInfo.IsAntiLambdaStar) {

// This is a costly operation, so we do it only for pi0s and sigma0s
auto const& daughters = mcParticle.template daughters_as<aod::McParticles>();
Expand All @@ -1647,7 +1652,7 @@ struct sigma0builder {
auto const& GenMothersList = mcParticle.template mothers_as<aod::McParticles>();
GenInfo.PDGCodeMother = (!GenMothersList.empty()) ? GenMothersList.front().pdgCode() : 0;

if ((GenInfo.IsSigma0 || GenInfo.IsAntiSigma0) && genSelections.doQA) {
if ((doLambdaStar ? (GenInfo.IsLambdaStar || GenInfo.IsAntiLambdaStar) : (GenInfo.IsSigma0 || GenInfo.IsAntiSigma0)) && genSelections.doQA) {
histos.fill(HIST("GenQA/h2dSigma0MCSourceVsPDGMother"), GenInfo.IsProducedByGenerator, GenInfo.PDGCodeMother);

// Checking decay modes and getting daughter pTs
Expand Down Expand Up @@ -1710,7 +1715,7 @@ struct sigma0builder {
histos.fill(HIST("GenQA/hGenSpeciesKStar"), 0);

// Checking decay mode
if (GenInfo.IsSigma0 || GenInfo.IsAntiSigma0) {
if (doLambdaStar ? (GenInfo.IsLambdaStar || GenInfo.IsAntiLambdaStar) : (GenInfo.IsSigma0 || GenInfo.IsAntiSigma0)) {
histos.fill(HIST("GenQA/hSigma0NDau"), GenInfo.NDaughters);
histos.fill(HIST("GenQA/h2dSigma0NDauVsProcess"), GenInfo.NDaughters, GenInfo.MCProcess);

Expand All @@ -1730,7 +1735,7 @@ struct sigma0builder {
histos.fill(HIST("GenQA/h2DGenSigma0TypeVsProducedByGen"), typeIndex, genIndex);

// Fill histograms
if (GenInfo.IsSigma0) {
if (doLambdaStar ? GenInfo.IsLambdaStar : GenInfo.IsSigma0) {
histos.fill(HIST("GenQA/hGenSpecies"), 2);
histos.fill(HIST("GenQA/hGenSigma0"), GenInfo.MCPt);
histos.fill(HIST("GenQA/h3dGenSigma0_pTMap"), GenInfo.MCPt, GenInfo.MCDau1Pt, GenInfo.MCDau2Pt);
Expand All @@ -1739,7 +1744,7 @@ struct sigma0builder {
if (GenInfo.IsPrimary)
histos.fill(HIST("GenQA/hPrimarySigma0s"), 1);
}
if (GenInfo.IsAntiSigma0) {
if (doLambdaStar ? GenInfo.IsAntiLambdaStar : GenInfo.IsAntiSigma0) {
histos.fill(HIST("GenQA/hGenSpecies"), 3);
histos.fill(HIST("GenQA/hGenAntiSigma0"), GenInfo.MCPt);
histos.fill(HIST("GenQA/h3dGenASigma0_pTMap"), GenInfo.MCPt, GenInfo.MCDau1Pt, GenInfo.MCDau2Pt);
Expand Down Expand Up @@ -1816,9 +1821,10 @@ struct sigma0builder {
pi0GenCollRefs(MCGenInfo.MCCollId); // link to stramccollision table
}

// Sigma0/ASigma0
if (fillSigma0Tables && (MCGenInfo.IsSigma0 || MCGenInfo.IsAntiSigma0)) {
sigma0Gens(MCGenInfo.IsSigma0, MCGenInfo.IsProducedByGenerator, MCGenInfo.MCPt, mcParticle.y());
// Sigma0/ASigma0 (Lambda(1520)/ALambda(1520))
bool fIsGenSigma0Like = doLambdaStar ? (MCGenInfo.IsLambdaStar || MCGenInfo.IsAntiLambdaStar) : (MCGenInfo.IsSigma0 || MCGenInfo.IsAntiSigma0);
if (fillSigma0Tables && fIsGenSigma0Like) {
sigma0Gens(doLambdaStar ? MCGenInfo.IsLambdaStar : MCGenInfo.IsSigma0, MCGenInfo.IsProducedByGenerator, MCGenInfo.MCPt, mcParticle.y());
sigma0GenCollRefs(MCGenInfo.MCCollId); // link to stramccollision table
}

Expand Down
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