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[PWGLF] Strangeness in jets: add histograms for efficiency studies #15015

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ercolessi merged 2 commits into from
Feb 18, 2026
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[PWGLF] Strangeness in jets: add histograms for efficiency studies #15015

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add histograms for efficiency studies
ercolessi Feb 17, 2026
5a1d8d5
clang
ercolessi Feb 17, 2026
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116 changes: 98 additions & 18 deletions PWGLF/Tasks/Strangeness/strangenessInJets.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -344,6 +344,15 @@ struct StrangenessInJets {
registryMC.add("K0s_generated_fullevent", "K0s_generated_fullevent", HistType::kTH2F, {multAxis, ptAxis});
registryMC.add("Lambda_generated_fullevent", "Lambda_generated_fullevent", HistType::kTH2F, {multAxis, ptAxis});
registryMC.add("AntiLambda_generated_fullevent", "AntiLambda_generated_fullevent", HistType::kTH2F, {multAxis, ptAxis});
registryMC.add("K0s_generated_recoevent", "K0s_generated_recoevent", HistType::kTH2F, {multAxis, ptAxis});
registryMC.add("Lambda_generated_recoevent", "Lambda_generated_recoevent", HistType::kTH2F, {multAxis, ptAxis});
registryMC.add("AntiLambda_generated_recoevent", "AntiLambda_generated_recoevent", HistType::kTH2F, {multAxis, ptAxis});
registryMC.add("K0s_generated_recojet_jet", "K0s_generated_recojet_jet", HistType::kTH2F, {multAxis, ptAxis});
registryMC.add("Lambda_generated_recojet_jet", "Lambda_generated_recojet_jet", HistType::kTH2F, {multAxis, ptAxis});
registryMC.add("AntiLambda_generated_recojet_jet", "AntiLambda_generated_recojet_jet", HistType::kTH2F, {multAxis, ptAxis});
registryMC.add("K0s_generated_recojet_ue", "K0s_generated_recojet_ue", HistType::kTH2F, {multAxis, ptAxis});
registryMC.add("Lambda_generated_recojet_ue", "Lambda_generated_recojet_ue", HistType::kTH2F, {multAxis, ptAxis});
registryMC.add("AntiLambda_generated_recojet_ue", "AntiLambda_generated_recojet_ue", HistType::kTH2F, {multAxis, ptAxis});
}
if (enabledSignals.value[ParticleOfInterest::kCascades]) {
registryMC.add("XiPos_generated_jet", "XiPos_generated_jet", HistType::kTH2F, {multAxis, ptAxis});
Expand Down Expand Up @@ -750,7 +759,7 @@ struct StrangenessInJets {
if (ntrack.tpcNSigmaPi() < nsigmaTPCmin || ntrack.tpcNSigmaPi() > nsigmaTPCmax)
return false;

if (doLamRej && std::abs(v0.mLambda() - o2::constants::physics::MassLambda) < lamRejWindow)
if (doLamRej && (std::abs(v0.mLambda() - o2::constants::physics::MassLambda) < lamRejWindow || std::abs(v0.mAntiLambda() - o2::constants::physics::MassLambda) < lamRejWindow))
return false;

if (std::abs(v0.mK0Short() - o2::constants::physics::MassK0Short) > k0sMassWindow)
Expand Down Expand Up @@ -1622,6 +1631,7 @@ struct StrangenessInJets {
const auto& v0sPerColl = fullV0s.sliceBy(perCollisionV0, collision.globalIndex());
const auto& cascPerColl = Cascades.sliceBy(perCollisionCasc, collision.globalIndex());
const auto& tracksPerColl = mcTracks.sliceBy(perCollisionTrk, collision.globalIndex());
const auto& mcParticlesPerColl = mcParticles.sliceBy(perMCCollision, mcCollision.globalIndex());

// V0 particles
if (enabledSignals.value[ParticleOfInterest::kV0Particles]) {
Expand Down Expand Up @@ -1723,6 +1733,10 @@ struct StrangenessInJets {
continue;
}

if (std::abs(mcParticle.eta()) > 0.8) {
continue;
}

switch (mcParticle.pdgCode()) {
case kPiPlus:
if (enabledSignals.value[ParticleOfInterest::kPions]) {
Expand Down Expand Up @@ -1760,6 +1774,31 @@ struct StrangenessInJets {
}
}

for (auto& particle : mcParticlesPerColl) {

if (particle.isPhysicalPrimary() && std::abs(particle.eta()) < 0.8) {
switch (particle.pdgCode()) {
case kK0Short:
if (enabledSignals.value[ParticleOfInterest::kV0Particles]) {
registryMC.fill(HIST("K0s_generated_recoevent"), multiplicity, particle.pt());
}
break;
case kLambda0:
if (enabledSignals.value[ParticleOfInterest::kV0Particles]) {
registryMC.fill(HIST("Lambda_generated_recoevent"), multiplicity, particle.pt());
}
break;
case kLambda0Bar:
if (enabledSignals.value[ParticleOfInterest::kV0Particles]) {
registryMC.fill(HIST("AntiLambda_generated_recoevent"), multiplicity, particle.pt());
}
break;
default:
break;
}
}
}

// Loop over reconstructed tracks
for (auto const& trk : tracksPerColl) {
if (!passedTrackSelectionForJetReconstruction(trk))
Expand Down Expand Up @@ -1820,6 +1859,48 @@ struct StrangenessInJets {
// Loop over selected jets
for (int i = 0; i < static_cast<int>(selectedJet.size()); i++) {

for (auto& particle : mcParticlesPerColl) {

const ParticlePositionWithRespectToJet positionMC{particle.px(), particle.py(), particle.pz(), selectedJet[i], ue1[i], ue2[i]};

if (particle.isPhysicalPrimary()) {
switch (particle.pdgCode()) {
case kK0Short:
if (enabledSignals.value[ParticleOfInterest::kV0Particles]) {
if (positionMC.isInJet()) {
registryMC.fill(HIST("K0s_generated_recojet_jet"), multiplicity, particle.pt());
}
if (positionMC.isInUE1() || positionMC.isInUE2()) {
registryMC.fill(HIST("K0s_generated_recojet_ue"), multiplicity, particle.pt());
}
}
break;
case kLambda0:
if (enabledSignals.value[ParticleOfInterest::kV0Particles]) {
if (positionMC.isInJet()) {
registryMC.fill(HIST("Lambda_generated_recojet_jet"), multiplicity, particle.pt());
}
if (positionMC.isInUE1() || positionMC.isInUE2()) {
registryMC.fill(HIST("Lambda_generated_recojet_ue"), multiplicity, particle.pt());
}
}
break;
case kLambda0Bar:
if (enabledSignals.value[ParticleOfInterest::kV0Particles]) {
if (positionMC.isInJet()) {
registryMC.fill(HIST("AntiLambda_generated_recojet_jet"), multiplicity, particle.pt());
}
if (positionMC.isInUE1() || positionMC.isInUE2()) {
registryMC.fill(HIST("AntiLambda_generated_recojet_ue"), multiplicity, particle.pt());
}
}
break;
default:
break;
}
}
}

// V0 particles
if (enabledSignals.value[ParticleOfInterest::kV0Particles]) {
for (const auto& v0 : v0sPerColl) {
Expand Down Expand Up @@ -2034,10 +2115,6 @@ struct StrangenessInJets {
continue;
if (std::fabs(v0.v0dcanegtopv()) < dcanegtoPVmin)
continue;
if (doK0sRej && std::abs(v0.massk0short() - o2::constants::physics::MassK0Short) < k0sRejWindow)
continue;
if (doLamRej && std::abs(v0.masslambda() - o2::constants::physics::MassLambda) < lamRejWindow)
continue;

// PID selections
bool isPIDK0s = false, isPIDLam = false, isPIDALam = false;
Expand All @@ -2060,26 +2137,29 @@ struct StrangenessInJets {
isPIDALam = true;
}

bool isK0Comp = std::abs(v0.massk0short() - o2::constants::physics::MassK0Short) < k0sRejWindow;
bool isLamComp = (std::abs(v0.masslambda() - o2::constants::physics::MassLambda) < lamRejWindow) || (std::abs(v0.massantilambda() - o2::constants::physics::MassLambda) < lamRejWindow);

bool acceptAsK0s = isPIDK0s && (!doLamRej || !isLamComp);
bool acceptAsLam = isPIDLam && (!doK0sRej || !isK0Comp);
bool acceptAsALam = isPIDALam && (!doK0sRej || !isK0Comp);

if (v0.isUE()) {
if (isPIDK0s) {
if (acceptAsK0s)
registryData.fill(HIST("K0s_in_ue"), v0.multft0m(), v0.pt(), v0.massk0short());
}
if (isPIDLam) {
if (acceptAsLam)
registryData.fill(HIST("Lambda_in_ue"), v0.multft0m(), v0.pt(), v0.masslambda());
}
if (isPIDALam) {
if (acceptAsALam)
registryData.fill(HIST("AntiLambda_in_ue"), v0.multft0m(), v0.pt(), v0.massantilambda());
}
} else if (v0.isJC()) {
if (isPIDK0s) {
}

if (v0.isJC()) {
if (acceptAsK0s)
registryData.fill(HIST("K0s_in_jet"), v0.multft0m(), v0.pt(), v0.massk0short());
}
if (isPIDLam) {
if (acceptAsLam)
registryData.fill(HIST("Lambda_in_jet"), v0.multft0m(), v0.pt(), v0.masslambda());
}
if (isPIDALam) {
if (acceptAsALam)
registryData.fill(HIST("AntiLambda_in_jet"), v0.multft0m(), v0.pt(), v0.massantilambda());
}
}
}

Expand Down
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