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[PWGLF] enabled efficient and scoped analysis per collision #12050

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Merged
alcaliva merged 3 commits into from
Jul 15, 2025
Merged

[PWGLF] enabled efficient and scoped analysis per collision #12050

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9c2873f
[PWGLF] enabled efficient and scoped analysis per collision
alcaliva Jul 14, 2025
edbe59f
removed white space
alcaliva Jul 14, 2025
b300eab
fixed typos
alcaliva Jul 14, 2025
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23 changes: 18 additions & 5 deletions PWGLF/Tasks/Strangeness/strangenessInJets.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -972,6 +972,11 @@ struct StrangenessInJets {
}
PROCESS_SWITCH(StrangenessInJets, processData, "Process data", true);

Preslice<aod::V0Datas> perCollisionV0 = o2::aod::v0data::collisionId;
Preslice<aod::CascDataExt> perCollisionCasc = o2::aod::cascade::collisionId;
Preslice<aod::McParticles> perMCCollision = o2::aod::mcparticle::mcCollisionId;
Preslice<DaughterTracksMC> perCollisionTrk = o2::aod::track::collisionId;

// Generated MC events
void processMCgenerated(aod::McCollisions const& collisions, aod::McParticles const& mcParticles)
{
Expand All @@ -994,9 +999,12 @@ struct StrangenessInJets {
// Multiplicity of generated event
double genMultiplicity = 0.0;

// MC particles per collision
auto mcParticlesPerColl = mcParticles.sliceBy(perMCCollision, collision.globalIndex());

// Loop over all MC particles and select physical primaries within acceptance
std::vector<fastjet::PseudoJet> fjParticles;
for (const auto& particle : mcParticles) {
for (const auto& particle : mcParticlesPerColl) {
if (!particle.isPhysicalPrimary())
continue;
double minPtParticle = 0.1;
Expand Down Expand Up @@ -1048,7 +1056,7 @@ struct StrangenessInJets {
getPerpendicularAxis(jetAxis, ueAxis2, -1);

// Loop over MC particles
for (const auto& particle : mcParticles) {
for (const auto& particle : mcParticlesPerColl) {
if (!particle.isPhysicalPrimary())
continue;
double minPtParticle = 0.1;
Expand Down Expand Up @@ -1152,9 +1160,14 @@ struct StrangenessInJets {
// Event multiplicity
const float multiplicity = collision.centFT0M();

// Number of V0 and cascades per collision
auto v0sPerColl = fullV0s.sliceBy(perCollisionV0, collision.globalIndex());
auto cascPerColl = Cascades.sliceBy(perCollisionCasc, collision.globalIndex());
auto tracksPerColl = mcTracks.sliceBy(perCollisionTrk, collision.globalIndex());

// Loop over reconstructed tracks
std::vector<fastjet::PseudoJet> fjParticles;
for (auto const& track : mcTracks) {
for (auto const& track : tracksPerColl) {
if (!passedTrackSelectionForJetReconstruction(track))
continue;

Expand Down Expand Up @@ -1217,7 +1230,7 @@ struct StrangenessInJets {

// V0 particles
if (particleOfInterest == Option::kV0Particles) {
for (const auto& v0 : fullV0s) {
for (const auto& v0 : v0sPerColl) {
const auto& pos = v0.posTrack_as<DaughterTracksMC>();
const auto& neg = v0.negTrack_as<DaughterTracksMC>();
TVector3 v0dir(v0.px(), v0.py(), v0.pz());
Expand Down Expand Up @@ -1316,7 +1329,7 @@ struct StrangenessInJets {

// Cascades
if (particleOfInterest == Option::kCascades) {
for (const auto& casc : Cascades) {
for (const auto& casc : cascPerColl) {
auto bach = casc.bachelor_as<DaughterTracksMC>();
auto pos = casc.posTrack_as<DaughterTracksMC>();
auto neg = casc.negTrack_as<DaughterTracksMC>();
Expand Down
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