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[PWGLF] Add additional systematic uncertainty configurations #18244

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15071832337 Oct 10, 2026
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16 changes: 1 addition & 15 deletions PWGLF/DataModel/LFSpincorrelationTables.h
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Original file line number Diff line number Diff line change
Expand Up @@ -53,12 +53,6 @@ DECLARE_SOA_COLUMN(ProtonPhi, protonPhi, float); //! Proton Ph
DECLARE_SOA_COLUMN(ProtonIndex, protonIndex, int); //! Proton index
DECLARE_SOA_COLUMN(PionIndex, pionIndex, int); //! Pion index
DECLARE_SOA_COLUMN(DcaV0ToPV, dcaV0ToPV, float); //! DCA of V0 to primary vertex
DECLARE_SOA_COLUMN(TpcPosNClsCrossedRows, tpcPosNClsCrossedRows, float);
DECLARE_SOA_COLUMN(TpcNegNClsCrossedRows, tpcNegNClsCrossedRows, float);
DECLARE_SOA_COLUMN(Ctau, ctau, float);
DECLARE_SOA_COLUMN(TpcNsigmaPos, tpcNsigmaPos, float);
DECLARE_SOA_COLUMN(TpcNsigmaNeg, tpcNsigmaNeg, float);
DECLARE_SOA_COLUMN(MK0Short, mK0Short, float);

} // namespace lambdapair
DECLARE_SOA_TABLE(LambdaPairs, "AOD", "LAMBDAPAIR",
Expand All @@ -80,13 +74,7 @@ DECLARE_SOA_TABLE(LambdaPairs, "AOD", "LAMBDAPAIR",
lambdapair::ProtonPhi,
lambdapair::ProtonIndex,
lambdapair::PionIndex,
lambdapair::DcaV0ToPV,
lambdapair::TpcPosNClsCrossedRows,
lambdapair::TpcNegNClsCrossedRows,
lambdapair::Ctau,
lambdapair::TpcNsigmaPos,
lambdapair::TpcNsigmaNeg,
lambdapair::MK0Short);
lambdapair::DcaV0ToPV);

using LambdaPair = LambdaPairs::iterator;

Expand Down Expand Up @@ -121,8 +109,6 @@ DECLARE_SOA_COLUMN(ProtonPhimc, protonPhimc, float); //! Proto
DECLARE_SOA_COLUMN(ProtonIndexmc, protonIndexmc, int); //! Proton index in montecarlo
DECLARE_SOA_COLUMN(PionIndexmc, pionIndexmc, int); //! Pion index in montecarlo
DECLARE_SOA_COLUMN(DcaV0ToPVmc, dcaV0ToPVmc, float); //! DCA of V0 to primary vertex

//! TPC n sigma
} // namespace lambdapairmc
DECLARE_SOA_TABLE(LambdaPairmcs, "AOD", "LAMBDAPAIRMC",
o2::soa::Index<>,
Expand Down
46 changes: 18 additions & 28 deletions PWGLF/TableProducer/Strangeness/lambdaspincorrelation.cxx
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Expand Up @@ -95,14 +95,21 @@ struct lambdaspincorrelation {
Configurable<double> cMaxV0DCA{"cMaxV0DCA", 1.2, "Maximum V0 DCA to PV"};
Configurable<float> cMinV0DCAPr{"cMinV0DCAPr", 0.05, "Minimum V0 daughters DCA to PV for Pr"};
Configurable<float> cMinV0DCAPi{"cMinV0DCAPi", 0.05, "Minimum V0 daughters DCA to PV for Pi"};
Configurable<float> cMaxV0LifeTime{"cMaxV0LifeTime", 50, "Maximum V0 life time"};

// config for V0 daughters
Configurable<float> confDaughEta{"confDaughEta", 0.8f, "V0 Daugh sel: max eta"};
Configurable<float> cfgDaughPrPt{"cfgDaughPrPt", 0.2, "minimum daughter proton pt"};
Configurable<float> cfgDaughPiPt{"cfgDaughPiPt", 0.2, "minimum daughter pion pt"};
Configurable<float> confDaughTPCnclsMin{"confDaughTPCnclsMin", 50.f, "V0 Daugh sel: Min. nCls TPC"};
Configurable<float> confDaughPIDCuts{"confDaughPIDCuts", 3, "PID selections for Lambda daughters"};

struct : ConfigurableGroup {
std::string prefix = "v0Configuration";
Configurable<int> cfgDaughTPCCrossedRows{"cfgDaughTPCCrossedRows", 70, "Min. TPC crossed rows for V0 daughters"};
Configurable<float> confK0sMassWindow{"confK0sMassWindow", 0.01, "K0s competing mass rejection window (GeV/c2)"};
Configurable<float> cMaxV0LifeTime{"cMaxV0LifeTime", 30, "Maximum V0 life time"};
Configurable<float> confDaughPIDCuts{"confDaughPIDCuts", 4, "PID selections for Lambda daughters"};

} v0Configurations;

Configurable<int> iMNbins{"iMNbins", 50, "Number of bins in invariant mass"};
Configurable<float> lbinIM{"lbinIM", 1.09, "lower bin value in IM histograms"};
Expand Down Expand Up @@ -149,7 +156,11 @@ struct lambdaspincorrelation {
if (tranRad > confV0TranRadV0Max) {
return false;
}
if (std::abs(ctauLambda) > cMaxV0LifeTime) {
if (std::abs(ctauLambda) > v0Configurations.cMaxV0LifeTime) {
return false;
}

if (std::abs(candidate.mK0Short() - o2::constants::physics::MassK0Short) < v0Configurations.confK0sMassWindow) {
return false;
}
// if (std::abs(candidate.yLambda()) > confV0Rap) {
Expand All @@ -162,10 +173,9 @@ struct lambdaspincorrelation {
bool isSelectedV0Daughter(V0 const& candidate, T const& track, int pid)
{
const auto tpcNClsF = track.tpcNClsFound();
const auto ncr = 70;
const auto ncrfc = 0.8;

if (track.tpcNClsCrossedRows() < ncr) {
if (track.tpcNClsCrossedRows() < v0Configurations.cfgDaughTPCCrossedRows) {
return false;
}
if (tpcNClsF < confDaughTPCnclsMin) {
Expand All @@ -175,10 +185,10 @@ struct lambdaspincorrelation {
return false;
}

if (pid == 0 && std::abs(track.tpcNSigmaPr()) > confDaughPIDCuts) {
if (pid == 0 && std::abs(track.tpcNSigmaPr()) > v0Configurations.confDaughPIDCuts) {
return false;
}
if (pid == 1 && std::abs(track.tpcNSigmaPi()) > confDaughPIDCuts) {
if (pid == 1 && std::abs(track.tpcNSigmaPi()) > v0Configurations.confDaughPIDCuts) {
return false;
}
if (pid == 0 && (candidate.positivept() < cfgDaughPrPt || candidate.negativept() < cfgDaughPiPt)) {
Expand Down Expand Up @@ -299,13 +309,6 @@ struct lambdaspincorrelation {
std::vector<int> negativeIndex = {};
std::vector<float> dcaBetweenDaughter = {};
std::vector<float> dcaV0ToPV = {};
std::vector<float> tpcPosNClsCrossedRows = {};
std::vector<float> tpcNegNClsCrossedRows = {};
std::vector<float> ctau = {};
std::vector<float> tpcNsigmaPos = {};
std::vector<float> tpcNsigmaNeg = {};
std::vector<float> mK0Short = {};

int numbV0 = 0;
// LOGF(info, "event collisions: (%d)", collision.index());
auto centrality = collision.centFT0C();
Expand Down Expand Up @@ -357,26 +360,13 @@ struct lambdaspincorrelation {
if (aLambdaTag) {
histos.fill(HIST("hV0Info"), 3.5);
}

float ctauLambda = v0.distovertotmom(collision.posX(), collision.posY(), collision.posZ()) * (o2::constants::physics::MassLambda);

// LOGF(info, "v0 index2: (%d)", v0.index());
auto postrack1 = v0.template posTrack_as<AllTrackCandidates>();
auto negtrack1 = v0.template negTrack_as<AllTrackCandidates>();
positiveIndex.push_back(postrack1.globalIndex());
negativeIndex.push_back(negtrack1.globalIndex());
v0Cospa.push_back(v0.v0cosPA());
dcaV0ToPV.push_back(std::abs(v0.dcav0topv()));

tpcPosNClsCrossedRows.push_back(postrack1.tpcNClsCrossedRows());
tpcNegNClsCrossedRows.push_back(negtrack1.tpcNClsCrossedRows());
ctau.push_back(ctauLambda);

tpcNsigmaPos.push_back(std::abs(postrack1.tpcNSigmaPr()));
tpcNsigmaNeg.push_back(std::abs(negtrack1.tpcNSigmaPi()));

mK0Short.push_back(v0.mK0Short());

v0Radius.push_back(v0.v0radius());
dcaPositive.push_back(std::abs(v0.dcapostopv()));
dcaNegative.push_back(std::abs(v0.dcanegtopv()));
Expand Down Expand Up @@ -413,7 +403,7 @@ struct lambdaspincorrelation {
lambdaDummy = lambdaMother.at(i5);
protonDummy = protonDaughter.at(i5);
pionDummy = pionDaughter.at(i5);
lambdaPair(indexEvent, v0Status.at(i5), doubleStatus.at(i5), v0Cospa.at(i5), v0Radius.at(i5), dcaPositive.at(i5), dcaNegative.at(i5), dcaBetweenDaughter.at(i5), lambdaDummy.Pt(), lambdaDummy.Eta(), lambdaDummy.Phi(), lambdaDummy.M(), protonDummy.Pt(), protonDummy.Eta(), protonDummy.Phi(), positiveIndex.at(i5), negativeIndex.at(i5), dcaV0ToPV.at(i5), tpcPosNClsCrossedRows.at(i5), tpcNegNClsCrossedRows.at(i5), ctau.at(i5), tpcNsigmaPos.at(i5), tpcNsigmaNeg.at(i5), mK0Short.at(i5));
lambdaPair(indexEvent, v0Status.at(i5), doubleStatus.at(i5), v0Cospa.at(i5), v0Radius.at(i5), dcaPositive.at(i5), dcaNegative.at(i5), dcaBetweenDaughter.at(i5), lambdaDummy.Pt(), lambdaDummy.Eta(), lambdaDummy.Phi(), lambdaDummy.M(), protonDummy.Pt(), protonDummy.Eta(), protonDummy.Phi(), positiveIndex.at(i5), negativeIndex.at(i5), dcaV0ToPV.at(i5));
}
}
}
Expand Down
38 changes: 0 additions & 38 deletions PWGLF/Tasks/Strangeness/lambdaspincorrderived.cxx
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Expand Up @@ -388,17 +388,6 @@ struct lambdaspincorrderived {
Configurable<float> dcaV0ToPV{"dcaV0ToPV", 1.2, "DCA V0 to PV cut on lambda"};
Configurable<float> v0etaMixBuffer{"v0etaMixBuffer", 0.5, "Eta cut on mix event buffer"};

// TPC crossed rows
Configurable<float> minTpcNClsCrossedRows{"minTpcNClsCrossedRows", 70.f, "Minimum TPC crossed rows for daughter"};

// ctau (lifetime)
Configurable<float> maxCtau{"maxCtau", 30.f, "Maximum ctau of Lambda candidate (cm)"};

// TPC nsigma
Configurable<float> maxTpcNsigma{"maxTpcNsigma", 4.f, "Maximum |TPC nsigma| for Lambda daughters"};

Configurable<float> confK0sMassWindow{"confK0sMassWindow", 0.01, "K0s competing mass rejection window (GeV/c2)"};

} v0Configurations;

// Event Mixing
Expand Down Expand Up @@ -908,33 +897,6 @@ struct lambdaspincorrderived {
return false;
}

// additional cuts
if (candidate.v0Status() == 0 && (std::abs(candidate.tpcNsigmaPos()) > v0Configurations.maxTpcNsigma || std::abs(candidate.tpcNsigmaNeg()) > v0Configurations.maxTpcNsigma)) {
return false;
}
if (candidate.v0Status() == 1 && (std::abs(candidate.tpcNsigmaNeg()) > v0Configurations.maxTpcNsigma || std::abs(candidate.tpcNsigmaPos()) > v0Configurations.maxTpcNsigma)) {
return false;
}

// ---- K0s competing mass rejection ----
if (std::abs(candidate.mK0Short() - o2::constants::physics::MassK0Short) < v0Configurations.confK0sMassWindow) {
return false;
}

/*
if (candidate.tpcPosNClsCrossedRows() < v0Configurations.minTpcNClsCrossedRows ) {
return false;
}

if (candidate.tpcNegNClsCrossedRows() < v0Configurations.minTpcNClsCrossedRows ) {
return false;
}

if (candidate.ctau() > v0Configurations.maxCtau ) {
return false;
}
*/

return true;
}

Expand Down
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