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[PWGCF] FemtoUniverse: Add mother QA to helicity bins. #15532

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Merged
prchakra merged 4 commits into from
Mar 27, 2026
+37 −15
Merged

[PWGCF] FemtoUniverse: Add mother QA to helicity bins. #15532

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439d4ae
Add QA for mothers in helicity bins
a-m-andrushko Mar 26, 2026
cf7a7c4
Add mother QA in helicity bins
a-m-andrushko Mar 26, 2026
37eca83
Add mother QA in helicity bins
a-m-andrushko Mar 26, 2026
917c6a4
Add mother QA to helicity bins
a-m-andrushko Mar 26, 2026
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52 changes: 37 additions & 15 deletions PWGCF/FemtoUniverse/Tasks/femtoUniversePairTaskTrackV0Helicity.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -111,6 +111,7 @@ struct FemtoUniversePairTaskTrackV0Helicity {
Configurable<int> confPDGCodeV0{"confPDGCodeV0", 3122, "V0 -- PDG code"};
Configurable<int> confPDGCodePosChild{"confPDGCodePosChild", 2212, "Positive Child -- PDG code"};
Configurable<int> confPDGCodeNegChild{"confPDGCodeNegChild", 211, "Negative Child -- PDG code"};
Configurable<bool> confSeparateInvMassCheck{"confSeparateInvMassCheck", false, "Apply additional cut separate for mLambda and mAntiLambda"};
} V0configs;

/// Partitioning for particle 2
Expand Down Expand Up @@ -159,12 +160,13 @@ struct FemtoUniversePairTaskTrackV0Helicity {
ConfigurableAxis confmTBins3D{"confmTBins3D", {VARIABLE_WIDTH, 1.02f, 1.14f, 1.20f, 1.26f, 1.38f, 1.56f, 1.86f, 4.50f}, "mT binning for the 3D plot: k* vs multiplicity vs mT (set <confUse3D> to true in order to use)"};
ConfigurableAxis confMultBins3D{"confMultBins3D", {VARIABLE_WIDTH, 0.0f, 20.0f, 30.0f, 40.0f, 99999.0f}, "multiplicity binning for the 3D plot: k* vs multiplicity vs mT (set <confUse3D> to true in order to use)"};

/// Helicity ranges (approximate)
/// Helicity ranges and configurables
Configurable<bool> cfgProcessHel{"cfgProcessHel", true, "Process particle pairs from all helicity ranges"};
Configurable<bool> cfgProcessHel1{"cfgProcessHel1", false, "Process particle pairs from the helicity range 1"}; // 1.0 > cosineTheta >= 0.1
Configurable<bool> cfgProcessHel1{"cfgProcessHel1", false, "Process particle pairs from the helicity range 1"}; // 1.0 >= cosineTheta >= 0.1
Configurable<bool> cfgProcessHel2{"cfgProcessHel2", false, "Process particle pairs from the helicity range 2"}; // 0.1 > cosineTheta >= -0.1
Configurable<bool> cfgProcessHel3{"cfgProcessHel3", false, "Process particle pairs from the helicity range 3"}; // -0.1 > cosineTheta >= -0.5
Configurable<bool> cfgProcessHel4{"cfgProcessHel4", false, "Process particle pairs from the helicity range 4"}; // -0.5 > cosineTheta >= -1.0
ConfigurableAxis confInvMassMotherpTBinsHel{"confInvMassMotherpTBinsHel", {5, 0, 5}, "pT binning in the pT vs. InvMassMother plot for helicity"};

/// Efficiency
Configurable<std::string> confLocalEfficiency{"confLocalEfficiency", "", "Local path to efficiency .root file"};
Expand Down Expand Up @@ -218,10 +220,17 @@ struct FemtoUniversePairTaskTrackV0Helicity {
}
}

bool invMLambda(float invMassLambda, float invMassAntiLambda)
bool invMLambda(float invMassLambda, float invMassAntiLambda, int V0Type)
{
if ((invMassLambda < V0configs.confV0InvMassLowLimit || invMassLambda > V0configs.confV0InvMassUpLimit) && (invMassAntiLambda < V0configs.confV0InvMassLowLimit || invMassAntiLambda > V0configs.confV0InvMassUpLimit)) {
return false;
if (V0configs.confSeparateInvMassCheck) {
const float pMass = V0Type ? invMassAntiLambda : invMassLambda;
if (pMass < V0configs.confV0InvMassLowLimit || pMass > V0configs.confV0InvMassUpLimit) {
return false;
}
} else {
if ((invMassLambda < V0configs.confV0InvMassLowLimit || invMassLambda > V0configs.confV0InvMassUpLimit) && (invMassAntiLambda < V0configs.confV0InvMassLowLimit || invMassAntiLambda > V0configs.confV0InvMassUpLimit)) {
return false;
}
}
return true;
}
Expand Down Expand Up @@ -287,6 +296,10 @@ struct FemtoUniversePairTaskTrackV0Helicity {
thetaRegistry.add("Theta/NegativeChild/hThetaPt", " ; p_{T} (GeV/#it{c}); cos(#theta)", kTH2F, {{100, 0, 10}, {110, -1.1, 1.1}});
thetaRegistry.add("Theta/NegativeChild/hThetaEta", " ; #eta; cos(#theta)", kTH2F, {{100, -1, 1}, {110, -1.1, 1.1}});
thetaRegistry.add("Theta/NegativeChild/hThetaPhi", " ; #phi; cos(#theta)", kTH2F, {{100, -1, 7}, {110, -1.1, 1.1}});
thetaRegistry.add("Theta/Mother/hInvMassMotherHel1", " ; p_{T}, M_{#Lambda};", kTH2F, {confInvMassMotherpTBinsHel, {100, 0.5, 1.5}});
thetaRegistry.add("Theta/Mother/hInvMassMotherHel2", " ; p_{T}, M_{#Lambda};", kTH2F, {confInvMassMotherpTBinsHel, {100, 0.5, 1.5}});
thetaRegistry.add("Theta/Mother/hInvMassMotherHel3", " ; p_{T}, M_{#Lambda};", kTH2F, {confInvMassMotherpTBinsHel, {100, 0.5, 1.5}});
thetaRegistry.add("Theta/Mother/hInvMassMotherHel4", " ; p_{T}, M_{#Lambda};", kTH2F, {confInvMassMotherpTBinsHel, {100, 0.5, 1.5}});

/// MC Truth
registryMCtruth.add("plus/MCtruthLambda", "MC truth Lambdas;#it{p}_{T} (GeV/c); #eta", {HistType::kTH2F, {{500, 0, 5}, {400, -1.0, 1.0}}});
Expand Down Expand Up @@ -427,7 +440,7 @@ struct FemtoUniversePairTaskTrackV0Helicity {

/// Histogramming same event
for (const auto& part : groupPartsTwo) {
if (!invMLambda(part.mLambda(), part.mAntiLambda()))
if (!invMLambda(part.mLambda(), part.mAntiLambda(), V0configs.confV0Type1))
continue;
const auto& posChild = parts.iteratorAt(part.index() - 2);
const auto& negChild = parts.iteratorAt(part.index() - 1);
Expand All @@ -453,6 +466,15 @@ struct FemtoUniversePairTaskTrackV0Helicity {
thetaRegistry.fill(HIST("Theta/NegativeChild/hThetaPt"), negChild.pt(), cosineTheta);
thetaRegistry.fill(HIST("Theta/NegativeChild/hThetaEta"), negChild.eta(), cosineTheta);
thetaRegistry.fill(HIST("Theta/NegativeChild/hThetaPhi"), negChild.phi(), cosineTheta);

if (cosineTheta <= 1.0 && cosineTheta >= 0.1)
thetaRegistry.fill(HIST("Theta/Mother/hInvMassMotherHel1"), part.pt(), part.mLambda());
else if (cosineTheta < 0.1 && cosineTheta >= -0.1)
thetaRegistry.fill(HIST("Theta/Mother/hInvMassMotherHel2"), part.pt(), part.mLambda());
else if (cosineTheta < -0.1 && cosineTheta >= -0.5)
thetaRegistry.fill(HIST("Theta/Mother/hInvMassMotherHel3"), part.pt(), part.mLambda());
else if (cosineTheta < -0.5 && cosineTheta >= -1)
thetaRegistry.fill(HIST("Theta/Mother/hInvMassMotherHel4"), part.pt(), part.mLambda());
}

for (const auto& part : groupPartsOne) {
Expand All @@ -476,7 +498,7 @@ struct FemtoUniversePairTaskTrackV0Helicity {
/// Now build the combinations
for (const auto& [p1, p2] : combinations(CombinationsFullIndexPolicy(groupPartsOne, groupPartsTwo))) {
// Lambda invariant mass cut
if (!invMLambda(p2.mLambda(), p2.mAntiLambda()))
if (!invMLambda(p2.mLambda(), p2.mAntiLambda(), V0configs.confV0Type1))
continue;
/// PID using stored binned nsigma
if (!isParticleCombined(p1, trackconfigs.confTrackChoicePartOne))
Expand Down Expand Up @@ -517,7 +539,7 @@ struct FemtoUniversePairTaskTrackV0Helicity {
}

case 1: {
if (cosineTheta < 1.0 && cosineTheta >= 0.1)
if (cosineTheta <= 1.0 && cosineTheta >= 0.1)
sameEventContHel1.setPair<false>(p1, p2, multCol, confUse3D, weight);

break;
Expand Down Expand Up @@ -592,7 +614,7 @@ struct FemtoUniversePairTaskTrackV0Helicity {

/// Histogramming same event
for (const auto& part : groupPartsTwo) {
if (!invMLambda(part.mLambda(), part.mAntiLambda()))
if (!invMLambda(part.mLambda(), part.mAntiLambda(), V0configs.confV0Type2))
continue;
const auto& posChild = parts.iteratorAt(part.index() - 2);
const auto& negChild = parts.iteratorAt(part.index() - 1);
Expand All @@ -613,10 +635,10 @@ struct FemtoUniversePairTaskTrackV0Helicity {

auto pairProcessFunc = [&](auto& p1, auto& p2) -> void {
// Lambda invariant mass cut for p1
if (!invMLambda(p1.mLambda(), p1.mAntiLambda()))
if (!invMLambda(p1.mLambda(), p1.mAntiLambda(), V0configs.confV0Type2))
return;
// Lambda invariant mass cut for p2
if (!invMLambda(p2.mLambda(), p2.mAntiLambda()))
if (!invMLambda(p2.mLambda(), p2.mAntiLambda(), V0configs.confV0Type2))
return;
// track cleaning
if (!pairCleanerV0.isCleanPair(p1, p2, parts)) {
Expand Down Expand Up @@ -773,7 +795,7 @@ struct FemtoUniversePairTaskTrackV0Helicity {

for (const auto& [p1, p2] : combinations(CombinationsFullIndexPolicy(groupPartsOne, groupPartsTwo))) {
// Lambda invariant mass cut
if (!invMLambda(p2.mLambda(), p2.mAntiLambda()))
if (!invMLambda(p2.mLambda(), p2.mAntiLambda(), V0configs.confV0Type1))
continue;
/// PID using stored binned nsigma
if (!isParticleCombined(p1, trackconfigs.confTrackChoicePartOne))
Expand Down Expand Up @@ -815,7 +837,7 @@ struct FemtoUniversePairTaskTrackV0Helicity {
}

case 1: {
if (cosineTheta < 1.0 && cosineTheta >= 0.1)
if (cosineTheta <= 1.0 && cosineTheta >= 0.1)
mixedEventContHel1.setPair<false>(p1, p2, multCol, confUse3D, weight);

break;
Expand Down Expand Up @@ -907,11 +929,11 @@ struct FemtoUniversePairTaskTrackV0Helicity {

for (const auto& [p1, p2] : combinations(CombinationsFullIndexPolicy(groupPartsOne, groupPartsTwo))) {
// Lambda invariant mass cut for p1
if (!invMLambda(p1.mLambda(), p1.mAntiLambda())) {
if (!invMLambda(p1.mLambda(), p1.mAntiLambda(), V0configs.confV0Type2)) {
continue;
}
// Lambda invariant mass cut for p2
if (!invMLambda(p2.mLambda(), p2.mAntiLambda())) {
if (!invMLambda(p2.mLambda(), p2.mAntiLambda(), V0configs.confV0Type2)) {
continue;
}

Expand Down
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