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[PWGLF] Added pT cut in PID selection #16856

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Merged
dmallick2 merged 1 commit into from
Jun 29, 2026
Merged

[PWGLF] Added pT cut in PID selection #16856

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30 changes: 16 additions & 14 deletions PWGLF/Tasks/Resonances/kstar892LightIon.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -765,11 +765,8 @@ struct Kstar892LightIon {
if (!c.hasTOF() || c.beta() <= selectionConfig.cfgTOFBetaCut)
return false;

const float tpc = tpcSigma(c, pid);
const float tof = tofSigma(c, pid);
const float cut = combinedCut(pid);

return tpc * tpc + tof * tof < cut * cut;
return combinedNSigma2(c, pid) < cut * cut;
}

template <typename T>
Expand Down Expand Up @@ -845,26 +842,31 @@ struct Kstar892LightIon {
return (std::abs(tpcSigma(candidate, pid)) < regionTPCCut);
}

case PIDStrategy::PIDCompare: // Apply independent TPC/TOF cuts below lowPtCutPid, above lowPtCutPid, require TOF and accept the candidate only if its combined nsigma is smaller than that of the alternate PID hypothesis
case PIDStrategy::PIDCompare: // Apply independent TPC/TOF cuts below lowPtCutPid, within lowPtCutPid and highPtCutPid, require TOF and accept the track only if its combined nsigma is smaller than that of the alternate PID hypothesis and above highPtCutPid if TOF is available, accept if the track passes combined cut and if TOF is not available, check if it passes TPC cut
{
if (candidate.pt() < selectionConfig.lowPtCutPid) {
if (candidate.hasTOF())
return passTPC(candidate, pid) && passTOF(candidate, pid);
return passTPC(candidate, pid);
}
} else if (candidate.pt() < selectionConfig.highPtCutPid) {
if (!candidate.hasTOF() || candidate.beta() <= selectionConfig.cfgTOFBetaCut)
return false;

if (!candidate.hasTOF() || candidate.beta() <= selectionConfig.cfgTOFBetaCut)
return false;
const float sigmaComb2 = combinedNSigma2(candidate, pid);

const float sigmaComb2 = combinedNSigma2(candidate, pid);
const float cut = combinedCut(pid);
if (sigmaComb2 >= cut * cut)
return false;

const float cut = combinedCut(pid);
if (sigmaComb2 >= cut * cut)
return false;
const PIDParticle otherPID = (pid == PIDParticle::kPion) ? PIDParticle::kKaon : PIDParticle::kPion;

const PIDParticle otherPID = (pid == PIDParticle::kPion) ? PIDParticle::kKaon : PIDParticle::kPion;
return sigmaComb2 < combinedNSigma2(candidate, otherPID);
} else {
if (candidate.hasTOF())
return passCombined(candidate, pid);

return sigmaComb2 < combinedNSigma2(candidate, otherPID);
return passTPC(candidate, pid);
}
}

default:
Expand Down
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