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[PWGLF] Add Mass Spectrum in H-Strangeness #17090

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romainschotter merged 1 commit into from
Jul 16, 2026
+27 −14
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[PWGLF] Add Mass Spectrum in H-Strangeness #17090

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41 changes: 27 additions & 14 deletions PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -128,6 +128,7 @@
Configurable<bool> useCentralityinPrediction{"useCentralityinPrediction", false, "if true, use centrality instead of multiplisity"};
Configurable<bool> doMirroringInDelataEta{"doMirroringInDelataEta", false, "if true, fill only positive delta eta and mirror the negative side in post processing, Adjust the delta axis!"};
Configurable<bool> fillCorrelationHistWithMass{"fillCorrelationHistWithMass", false, "if true, fill correlation histograms with particle mass"};
Configurable<bool> doMassSpectrumCheck{"doMassSpectrumCheck", false, "if true, add and fill invariant-mass spectrum"};
} masterConfigurations;

// master analysis switches
Expand Down Expand Up @@ -380,6 +381,19 @@
static constexpr int IndexLambda = 1;
static constexpr int IndexAntiLambda = 2;

template <int Index, typename TV0>
static float getV0InvariantMass(TV0 const& v0)
{
static_assert(Index >= IndexK0 && Index <= IndexAntiLambda);
if constexpr (Index == IndexK0) {
return v0.mK0Short();
} else if constexpr (Index == IndexLambda) {
return v0.mLambda();
} else {
return v0.mAntiLambda();
}
}

uint16_t doCorrelation;
int mRunNumber;
int mRunNumberZorro;
Expand Down Expand Up @@ -949,19 +963,7 @@
}
if (assocCandidate.compatible(Index, trackSelection.dEdxCompatibility) && (!masterConfigurations.doMCassociation || assocCandidate.mcTrue(Index)) && (!doAssocPhysicalPrimary || assocCandidate.mcPhysicalPrimary()) && !mixing && (masterConfigurations.fillCorrelationHistWithMass || (-massWindowConfigurations.maxPeakNSigma < assocCandidate.invMassNSigma(Index) && assocCandidate.invMassNSigma(Index) < +massWindowConfigurations.maxPeakNSigma))) {
if (masterConfigurations.fillCorrelationHistWithMass) {
float massAssoc = 0.f;
switch (i) {
case 0:
massAssoc = assoc.mK0Short();
break;
case 1:
massAssoc = assoc.mLambda();
break;
case 2:
massAssoc = assoc.mAntiLambda();
break;
}
binFillThn[1] = massAssoc;
binFillThn[1] = getV0InvariantMass<Index>(assoc);
}
fillCorrelationHistogram(histos.get<THn>(HIST("sameEvent/Signal/") + HIST(V0names[Index])), binFillThn, etaWeight, efficiency * efficiencyTrigg, totalEffUncert, purityTrigg, purityTriggErr);
if (std::abs(deltaphi) < checks.towardDeltaEtaRange && doITSClustersQA) {
Expand Down Expand Up @@ -1036,9 +1038,9 @@
int binnumb = binMult * nBinsVtxZ + binVtxZ;
int hastirgorassoc = masterConfigurations.collisionHasTriggOrAssoc;
if ((hastirgorassoc == 1 && currentCollision.trigParticles.empty()) ||
(hastirgorassoc == 2 && currentCollision.assocParticles.empty()) ||

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
(hastirgorassoc == 3 && currentCollision.trigParticles.empty() && currentCollision.assocParticles.empty()) ||

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
(hastirgorassoc == 4 && (currentCollision.trigParticles.empty() || currentCollision.assocParticles.empty())))

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
return;
for (const auto& collision : validCollisions[binnumb]) {
BinningTypePP colBinning{{axesConfigurations.axisVtxZ, axesConfigurations.axisMult}, true};
Expand Down Expand Up @@ -1074,7 +1076,7 @@
if (Index == assoc.type && assoc.region == 1) {
fillCorrelationHistogram(histos.get<THn>(HIST("mixedEvent/Signal/") + HIST(V0names[Index])), binFillThn, 1, efficiencyTrigg * efficiencyAssoc, totalEffUncert, 1., 0.);
}
if (Index == assoc.type && assoc.region == 2) {

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
fillCorrelationHistogram(histos.get<THn>(HIST("mixedEvent/RightBg/") + HIST(V0names[Index])), binFillThn, 1, efficiencyTrigg * efficiencyAssoc, totalEffUncert, 1., 0.);
}
});
Expand Down Expand Up @@ -1349,9 +1351,9 @@
int binnumb = binMult * nBinsVtxZ + binVtxZ;
int hastirgorassoc = masterConfigurations.collisionHasTriggOrAssoc;
if ((hastirgorassoc == 1 && currentCollision.trigParticles.empty()) ||
(hastirgorassoc == 2 && currentCollision.assocParticles.empty()) ||

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
(hastirgorassoc == 3 && currentCollision.trigParticles.empty() && currentCollision.assocParticles.empty()) ||

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
(hastirgorassoc == 4 && (currentCollision.trigParticles.empty() || currentCollision.assocParticles.empty())))

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
return;
for (const auto& collision : validCollisions[binnumb]) {
BinningTypePP colBinning{{axesConfigurations.axisVtxZ, axesConfigurations.axisMult}, true};
Expand Down Expand Up @@ -1382,7 +1384,7 @@
if (Index == assoc.type && assoc.region == 1) {
fillCorrelationHistogram(histos.get<THn>(HIST("mixedEvent/Signal/") + HIST(Cascadenames[Index])), binFillThn, 1, efficiencyTrigg * efficiencyAssoc, totalEffUncert, 1., 0.);
}
if (Index == assoc.type && assoc.region == 2) {

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
fillCorrelationHistogram(histos.get<THn>(HIST("mixedEvent/RightBg/") + HIST(Cascadenames[Index])), binFillThn, 1, efficiencyTrigg * efficiencyAssoc, totalEffUncert, 1., 0.);
}
});
Expand Down Expand Up @@ -1907,7 +1909,15 @@
histos.addClone("sameEvent/Signal/", "sameEvent/LeftBg/");
histos.addClone("sameEvent/Signal/", "sameEvent/RightBg/");
}

if (TESTBIT(doCorrelation, 0) && doprocessSameEventHV0s && masterConfigurations.doMassSpectrumCheck) {
histos.add("hK0ShortPtVsMass", "", kTH2F, {axesConfigurations.axisPtQA, axesConfigurations.axisK0ShortMass});
}
if (TESTBIT(doCorrelation, 1) && doprocessSameEventHV0s && masterConfigurations.doMassSpectrumCheck) {
histos.add("hLambdaPtVsMass", "", kTH2F, {axesConfigurations.axisPtQA, axesConfigurations.axisLambdaMass});
}
if (TESTBIT(doCorrelation, 2) && doprocessSameEventHV0s && masterConfigurations.doMassSpectrumCheck) {
histos.add("hAntiLambdaPtVsMass", "", kTH2F, {axesConfigurations.axisPtQA, axesConfigurations.axisLambdaMass});
}
LOGF(info, "Init THnFs done");
// mixed-event correlation functions
if ((doprocessMixedEventHV0sInBuffer || doprocessMixedEventHCascadesInBuffer || doprocessMixedEventHV0s || doprocessMixedEventHCascades || doprocessMixedEventHPions || doprocessMixedEventHHadrons) && masterConfigurations.doFullCorrelationStudy) {
Expand Down Expand Up @@ -2369,6 +2379,9 @@
if (v0.compatible(Index, trackSelection.dEdxCompatibility) && (!masterConfigurations.doMCassociation || v0.mcTrue(Index)) && (!doAssocPhysicalPrimary || v0.mcPhysicalPrimary()) && (!efficiencyFlags.applyEfficiencyCorrection || efficiency != 0)) {
if ((TESTBIT(doCorrelation, Index)) && (masterConfigurations.doPPAnalysis || (TESTBIT(selMap, Index) && TESTBIT(selMap, Index + 3)))) {
histos.fill(HIST("h3d") + HIST(V0names[Index]) + HIST("Spectrum"), v0Data.pt(), cent, v0.invMassNSigma(Index), weight);
if (masterConfigurations.doMassSpectrumCheck) {
histos.fill(HIST("h") + HIST(V0names[Index]) + HIST("PtVsMass"), v0Data.pt(), getV0InvariantMass<Index>(v0Data));
}
if (std::abs(v0Data.rapidity(Index)) < ySel) {
histos.fill(HIST("h3d") + HIST(V0names[Index]) + HIST("SpectrumY"), v0Data.pt(), cent, v0.invMassNSigma(Index), weight);
}
Expand Down
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