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[PWGLF] Perform P-Lambda correlation in hStrangeCorrelationFilter.cxx and hStrangeCorrelation.cxx #18411

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romainschotter merged 4 commits into from
Oct 22, 2026
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[PWGLF] Perform P-Lambda correlation in hStrangeCorrelationFilter.cxx and hStrangeCorrelation.cxx #18411

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15 changes: 13 additions & 2 deletions PWGLF/TableProducer/Strangeness/hStrangeCorrelationFilter.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -138,6 +138,10 @@ struct HStrangeCorrelationFilter {
// formula: |DCAxy| < 0.004f + (0.013f / pt)
Configurable<float> dcaXYconstant{"dcaXYconstant", 0.004, "[0] in |DCAxy| < [0]+[1]/pT"};
Configurable<float> dcaXYpTdep{"dcaXYpTdep", 0.013, "[1] in |DCAxy| < [0]+[1]/pT"};

// perform P-Lambda correlation analysis
Configurable<float> performPLambdacorrelation{"performPLambdacorrelation", 3, "do p-Lambda correlation study"};
Configurable<float> triggerProtonNSigmaTPCFOF{"triggerProtonNSigmaTPCFOF", 3, "minimal n sigma in TOF and TPC for Proton ID"};
} trackSelections;
struct : ConfigurableGroup {
// V0 selections
Expand Down Expand Up @@ -213,8 +217,8 @@ struct HStrangeCorrelationFilter {

// using V0LinkedTagged = soa::Join<aod::V0sLinked, aod::V0Tags>;
// using CascadesLinkedTagged = soa::Join<aod::CascadesLinked, aod::CascTags>;
using FullTracks = soa::Join<aod::Tracks, aod::TracksExtra, aod::TracksDCA, aod::TrackCompColls>;
using FullTracksMC = soa::Join<aod::Tracks, aod::TracksExtra, aod::TracksDCA, aod::McTrackLabels, aod::TrackCompColls>;
using FullTracks = soa::Join<aod::Tracks, aod::TracksExtra, aod::TracksDCA, aod::pidTPCFullPr, aod::pidTOFFullPr, aod::TrackCompColls>;
using FullTracksMC = soa::Join<aod::Tracks, aod::TracksExtra, aod::TracksDCA, aod::McTrackLabels, aod::pidTPCFullPr, aod::pidTOFFullPr, aod::TrackCompColls>;
using DauTracks = soa::Join<aod::Tracks, aod::TracksExtra, aod::pidTPCFullPi, aod::pidTPCFullKa, aod::pidTPCFullPr, aod::TracksDCA, aod::TrackCompColls>;
using DauTracksMC = soa::Join<aod::Tracks, aod::TracksExtra, aod::pidTPCFullPi, aod::pidTPCFullKa, aod::pidTPCFullPr, aod::TracksDCA, aod::McTrackLabels, aod::TrackCompColls>;
// using IDTracks= soa::Join<aod::Tracks, aod::TracksExtra, aod::pidTPCFullPi, aod::pidTOFFullPi, aod::pidBayesPi, aod::pidBayesKa, aod::pidBayesPr, aod::TOFSignal>; // prepared for Bayesian PID
Expand Down Expand Up @@ -459,6 +463,13 @@ struct HStrangeCorrelationFilter {
if (!(TESTBIT(track.itsClusterMap(), 0)) && trackSelections.triggerRequireL0) {
return false; // skip, doesn't have cluster in ITS L0
}
bool isProton = std::sqrt(track.tofNSigmaPr() * track.tofNSigmaPr() + track.tpcNSigmaPr() * track.tpcNSigmaPr()) <= trackSelections.triggerProtonNSigmaTPCFOF;
if (trackSelections.performPLambdacorrelation <= 1 && !isProton) {
return false;
}
if (trackSelections.performPLambdacorrelation == 2 && isProton) {
return false;
}
return true;
}
template <class TTrack>
Expand Down
7 changes: 7 additions & 0 deletions PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx
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Expand Up @@ -149,6 +149,7 @@ struct HStrangeCorrelation {
Configurable<bool> doLocalDensityStudy{"doLocalDensityStudy", false, "if true, create and fill the pt vs eta vs local density spectra of triggers and V0s"};
Configurable<float> localDensityConeRadius{"localDensityConeRadius", 0.4, "radius of the cone in which the local density is counted"};
Configurable<bool> doMultEstimatorResponse{"doMultEstimatorResponse", false, "processSameEventHV0s: fill MultEstimatorResponse, multNTracksPVeta1 vs FT0M percentile and amplitude, with the event selection of PairLossK0/EventRecoEfficiency (no INEL cuts)"};
Configurable<float> performPLambdacorrelation{"performPLambdacorrelation", 3, "do p-Lambda correlation study"};
} masterConfigurations;

// master analysis switches
Expand Down Expand Up @@ -1538,6 +1539,12 @@ struct HStrangeCorrelation {
float efficiency = 1.0f;
float totalEffUncert = 0.0;
float efficiencyError = 0.0f;
if (masterConfigurations.performPLambdacorrelation == 0 && ((Index == 1 && triggSign == 1) || (Index == 2 && triggSign == -1))) {
return;
}
if (masterConfigurations.performPLambdacorrelation == 1 && ((Index == 1 && triggSign == -1) || (Index == 2 && triggSign == 1))) {
return;
}
if (efficiencyFlags.applyEfficiencyCorrection) {
if (efficiencyFlags.applyEffAsFunctionOfMultAndPhi) {
std::array<double, 4> bin = {ptassoc, assoc.eta(), assoc.phi(), mult};
Expand Down
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