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[PWGLF] Nuclei proton correlation: fix proton rejection #18220

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Merged
maciacco merged 1 commit into from
Oct 8, 2026
Merged

[PWGLF] Nuclei proton correlation: fix proton rejection #18220

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11 changes: 5 additions & 6 deletions PWGLF/Tasks/Nuspex/hadronnucleicorrelation.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -95,7 +95,6 @@ struct HadronNucleiCorrelation {
Configurable<bool> isPrim{"isPrim", true, "is isPrim"};
Configurable<bool> doCorrection{"doCorrection", false, "do efficiency correction"};
Configurable<bool> doQuadraticPID{"doQuadraticPID", false, "do PID with sum in quadrature of TOF and TPC"};
Configurable<bool> doPIDRej{"doPIDRej", false, "do PID rejection of competing species"};

struct : ConfigurableGroup {
std::string prefix = "Coalescence"; // JSON group name
Expand All @@ -116,7 +115,7 @@ struct HadronNucleiCorrelation {
Configurable<bool> removeSameBunchPileup{"removeSameBunchPileup", false, "remove Same Bunch Pileup"};

// Track selection
Configurable<bool> doClosePairRejection{"doClosePairRejection", false, "doClosePairRejection"};
Configurable<bool> doClosePairRejection{"doClosePairRejection", false, "doClosePairRejection for non identical particles"};
Configurable<double> dcaPar0{"dcaPar0", 0.004, "par 0"};
Configurable<double> dcaPar1{"dcaPar1", 0.013, "par 1"};
Configurable<bool> doDCAZ{"doDCAZ", true, "do DCA z cut"};
Expand All @@ -131,8 +130,8 @@ struct HadronNucleiCorrelation {
Configurable<float> nsigmaElPr{"nsigmaElPr", 1.0f, "cut nsigma TPC El for protons"};
Configurable<float> nsigmaElDe{"nsigmaElDe", 3.0f, "cut nsigma TPC El for protons"};
Configurable<float> nsigmaTOF{"nsigmaTOF", 3.5f, "cut nsigma TOF"};
Configurable<float> nsigmaTOFPrRej{"nsigmaTOFPrRej", 3.f, "cut nsigma TOF for proton rejection"};
Configurable<bool> doPrRej{"doPrRej", true, "do TOF proton rejection"};
Configurable<float> nsigmaTPCPrRej{"nsigmaTPCPrRej", 3.f, "cut nsigma TPC for proton rejection"};
Configurable<bool> doPrRej{"doPrRej", true, "do TPC proton rejection"};
Configurable<float> nsigmaQuadratic{"nsigmaQuadratic", 3.0f, "cut on sqrt(nsigmaTPC^2 + nsigmaTOF^2), used above the TOF pT threshold when doQuadraticPID is on"};
Configurable<float> nsigmaITSPr{"nsigmaITSPr", -2.0f, "cut nsigma ITS Pr"};
Configurable<float> nsigmaITSDe{"nsigmaITSDe", -2.0f, "cut nsigma ITS De"};
Expand Down Expand Up @@ -622,7 +621,7 @@ struct HadronNucleiCorrelation {
const bool isTOFPID = std::abs(track.tofNSigmaDe()) < nsigmaTOF.value;
const bool isTPCElRejection = rejectionEl.value && track.beta() < BetahasTOFthr && track.pt() < pTthrdeTPCEl.value && track.tpcNSigmaEl() >= nsigmaElDe.value;
const bool isITSPID = track.itsNSigmaDe() > nsigmaITSDe.value;
const bool isNotPr = std::abs(track.tofNSigmaPr()) >= nsigmaTOFPrRej.value || !doPrRej.value;
const bool isNotPr = std::abs(track.tpcNSigmaPr()) >= nsigmaTPCPrRej.value || !doPrRej.value;

const bool isQuadraticPID = std::hypot(track.tpcNSigmaDe(), track.tofNSigmaDe()) < nsigmaQuadratic.value;

Expand Down Expand Up @@ -1031,7 +1030,7 @@ struct HadronNucleiCorrelation {

const bool isTPCElRejection = rejectionEl.value && track.beta() < BetahasTOFthr && track.pt() < pTthrdeTPCEl.value && track.tpcNSigmaEl() >= nsigmaElDe.value;
const bool isTOFPID = std::abs(track.tofNSigmaDe()) < nsigmaTOF.value;
const bool isNotPr = std::abs(track.tofNSigmaPr()) >= nsigmaTOFPrRej.value || !doPrRej.value;
const bool isNotPr = std::abs(track.tpcNSigmaPr()) >= nsigmaTPCPrRej.value || !doPrRej.value;

if (track.sign() > 0) {

Expand Down
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