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[PWGCF] Low pt PID Separation #16867

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Merged
SwatiSaha-1997 merged 1 commit into from
Jun 29, 2026
+28 −13
Merged

[PWGCF] Low pt PID Separation #16867

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41 changes: 28 additions & 13 deletions PWGCF/EbyEFluctuations/Tasks/v0ptHadPiKaProt.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -116,8 +116,7 @@ struct V0ptHadPiKaProt {
Configurable<float> cfgnSigmaCutTPC{"cfgnSigmaCutTPC", 2.0f, "PID nSigma cut for TPC"};
Configurable<float> cfgnSigmaCutTOF{"cfgnSigmaCutTOF", 2.0f, "PID nSigma cut for TOF"};
Configurable<bool> cfgUseNewSeperationPid{"cfgUseNewSeperationPid", false, "Use seperation based PID cuts (NEW)"};
Configurable<float> cfgnSigmaCutTPCHigherPt{"cfgnSigmaCutTPCHigherPt", 2.0f, "PID nSigma cut for TPC at higher pt"};
Configurable<float> cfgnSigmaCutTOFHigherPt{"cfgnSigmaCutTOFHigherPt", 2.0f, "PID nSigma cut for TOF at higher pt"};
Configurable<float> cfgnSigmaCutTPCorTOFHigherPt{"cfgnSigmaCutTPCorTOFHigherPt", 2.0f, "PID nSigma cut for TPC at higher pt"};
Configurable<float> cfgnSigmaSeperationCut{"cfgnSigmaSeperationCut", 3.5f, "PID nSigma of other species must be greater than the vale"};
Configurable<float> cfgnSigmaCutCombTPCTOF{"cfgnSigmaCutCombTPCTOF", 2.0f, "PID nSigma combined cut for TPC and TOF"};
ConfigurableAxis nchAxis{"nchAxis", {5000, 0.5, 5000.5}, ""};
Expand Down Expand Up @@ -158,6 +157,7 @@ struct V0ptHadPiKaProt {
Configurable<int> cfgV02WeightedFill{"cfgV02WeightedFill", false, "Fill profiles related to v2 with multiplicity-based weights?"};
Configurable<int> cfgV02WeightedOption3Fill{"cfgV02WeightedOption3Fill", false, "Fill profiles related to v2 with multiplicity-based weights according to Option3, triplet weighting for <XYZ>"};
Configurable<bool> cfgUseDominanceCut{"cfgUseDominanceCut", true, "Require particle selecting species' nSigma to be smallest among other two"};
Configurable<bool> cfgUseSeperationCutLowPt{"cfgUseSeperationCutLowPt", false, "Use separation cut for low pT"};

// pT dep DCAxy and DCAz cuts
Configurable<bool> cfgUsePtDepDCAxy{"cfgUsePtDepDCAxy", true, "Use pt-dependent DCAxy cut"};
Expand Down Expand Up @@ -786,12 +786,17 @@ struct V0ptHadPiKaProt {
partNsigmaTpcOrItsPr = candidate.tpcNSigmaPr();
}

bool separatedFromOthers = true;
if (cfgUseSeperationCutLowPt) {
separatedFromOthers = std::abs(partNsigmaTpcOrItsPi) > cfgnSigmaSeperationCut && std::abs(partNsigmaTpcOrItsKa) > cfgnSigmaSeperationCut;
}

if (candidate.pt() > cfgCutPtLower && candidate.pt() <= cfgCutPtUpperTPC) {

if (!candidate.hasTOF() && std::abs(partNsigmaTpcOrItsPr) < cfgnSigmaCutTPC) {
if (!candidate.hasTOF() && std::abs(partNsigmaTpcOrItsPr) < cfgnSigmaCutTPC && separatedFromOthers) {
flag = 1;
}
if (candidate.hasTOF() && std::abs(partNsigmaTpcOrItsPr) < cfgnSigmaCutTPC && std::abs(candidate.tofNSigmaPr()) < cfgnSigmaCutTOF) {
if (candidate.hasTOF() && std::abs(partNsigmaTpcOrItsPr) < cfgnSigmaCutTPC && std::abs(candidate.tofNSigmaPr()) < cfgnSigmaCutTOF && separatedFromOthers) {
flag = 1;
}
}
Expand All @@ -809,7 +814,7 @@ struct V0ptHadPiKaProt {
flag2 += 1;

if (cfgUseNewSeperationPid) {
if (std::abs(partNsigmaTpcOrItsPr) < cfgnSigmaCutTPCHigherPt && std::abs(candidate.tofNSigmaPr()) < cfgnSigmaCutTOFHigherPt) {
if (std::abs(partNsigmaTpcOrItsPr) < cfgnSigmaCutTPCorTOFHigherPt && std::abs(candidate.tofNSigmaPr()) < cfgnSigmaCutTPCorTOFHigherPt) {
if (!(flag2 > 1) && std::abs(partNsigmaTpcOrItsPi) > cfgnSigmaSeperationCut && std::abs(candidate.tofNSigmaPi()) > cfgnSigmaSeperationCut && std::abs(partNsigmaTpcOrItsKa) > cfgnSigmaSeperationCut && std::abs(candidate.tofNSigmaKa()) > cfgnSigmaSeperationCut)
flag = 1;
}
Expand All @@ -822,7 +827,7 @@ struct V0ptHadPiKaProt {
}

if (!(flag2 > 1) && passDominance) {
histos.fill(HIST("h2DnsigmaKaonTpcVsTofInterimCut"), candidate.pt(), candidate.tpcNSigmaPr(), candidate.tofNSigmaPr());
histos.fill(HIST("h2DnsigmaProtonTpcVsTofInterimCut"), candidate.pt(), candidate.tpcNSigmaPr(), candidate.tofNSigmaPr());

if (combNSigmaPr < cfgnSigmaCutCombTPCTOF) {
flag = 1;
Expand Down Expand Up @@ -856,12 +861,17 @@ struct V0ptHadPiKaProt {
partNsigmaTpcOrItsPr = candidate.tpcNSigmaPr();
}

bool separatedFromOthers = true;
if (cfgUseSeperationCutLowPt) {
separatedFromOthers = std::abs(partNsigmaTpcOrItsKa) > cfgnSigmaSeperationCut && std::abs(partNsigmaTpcOrItsPr) > cfgnSigmaSeperationCut;
}

if (candidate.pt() > cfgCutPtLower && candidate.pt() <= cfgCutPtUpperTPC) {

if (!candidate.hasTOF() && std::abs(partNsigmaTpcOrItsPi) < cfgnSigmaCutTPC) {
if (!candidate.hasTOF() && std::abs(partNsigmaTpcOrItsPi) < cfgnSigmaCutTPC && separatedFromOthers) {
flag = 1;
}
if (candidate.hasTOF() && std::abs(partNsigmaTpcOrItsPi) < cfgnSigmaCutTPC && std::abs(candidate.tofNSigmaPi()) < cfgnSigmaCutTOF) {
if (candidate.hasTOF() && std::abs(partNsigmaTpcOrItsPi) < cfgnSigmaCutTPC && std::abs(candidate.tofNSigmaPi()) < cfgnSigmaCutTOF && separatedFromOthers) {
flag = 1;
}
}
Expand All @@ -879,7 +889,7 @@ struct V0ptHadPiKaProt {
flag2 += 1;

if (cfgUseNewSeperationPid) {
if (std::abs(partNsigmaTpcOrItsPi) < cfgnSigmaCutTPCHigherPt && std::abs(candidate.tofNSigmaPi()) < cfgnSigmaCutTOFHigherPt) {
if (std::abs(partNsigmaTpcOrItsPi) < cfgnSigmaCutTPCorTOFHigherPt && std::abs(candidate.tofNSigmaPi()) < cfgnSigmaCutTPCorTOFHigherPt) {
if (!(flag2 > 1) && std::abs(partNsigmaTpcOrItsKa) > cfgnSigmaSeperationCut && std::abs(candidate.tofNSigmaKa()) > cfgnSigmaSeperationCut && std::abs(partNsigmaTpcOrItsPr) > cfgnSigmaSeperationCut && std::abs(candidate.tofNSigmaPr()) > cfgnSigmaSeperationCut)
flag = 1;
}
Expand All @@ -892,7 +902,7 @@ struct V0ptHadPiKaProt {
}

if (!(flag2 > 1) && passDominance) {
histos.fill(HIST("h2DnsigmaKaonTpcVsTofInterimCut"), candidate.pt(), candidate.tpcNSigmaPi(), candidate.tofNSigmaPi());
histos.fill(HIST("h2DnsigmaPionTpcVsTofInterimCut"), candidate.pt(), candidate.tpcNSigmaPi(), candidate.tofNSigmaPi());
if (combNSigmaPi < cfgnSigmaCutCombTPCTOF) {
flag = 1;
}
Expand Down Expand Up @@ -925,12 +935,17 @@ struct V0ptHadPiKaProt {
partNsigmaTpcOrItsPr = candidate.tpcNSigmaPr();
}

bool separatedFromOthers = true;
if (cfgUseSeperationCutLowPt) {
separatedFromOthers = std::abs(partNsigmaTpcOrItsPi) > cfgnSigmaSeperationCut && std::abs(partNsigmaTpcOrItsPr) > cfgnSigmaSeperationCut;
}

if (candidate.pt() > cfgCutPtLower && candidate.pt() <= cfgCutPtUpperTPC) {

if (!candidate.hasTOF() && std::abs(partNsigmaTpcOrItsKa) < cfgnSigmaCutTPC) {
if (!candidate.hasTOF() && std::abs(partNsigmaTpcOrItsKa) < cfgnSigmaCutTPC && separatedFromOthers) {
flag = 1;
}
if (candidate.hasTOF() && std::abs(partNsigmaTpcOrItsKa) < cfgnSigmaCutTPC && std::abs(candidate.tofNSigmaKa()) < cfgnSigmaCutTOF) {
if (candidate.hasTOF() && std::abs(partNsigmaTpcOrItsKa) < cfgnSigmaCutTPC && std::abs(candidate.tofNSigmaKa()) < cfgnSigmaCutTOF && separatedFromOthers) {
flag = 1;
}
}
Expand All @@ -948,7 +963,7 @@ struct V0ptHadPiKaProt {
flag2 += 1;

if (cfgUseNewSeperationPid) {
if (std::abs(partNsigmaTpcOrItsKa) < cfgnSigmaCutTPCHigherPt && std::abs(candidate.tofNSigmaKa()) < cfgnSigmaCutTOFHigherPt) {
if (std::abs(partNsigmaTpcOrItsKa) < cfgnSigmaCutTPCorTOFHigherPt && std::abs(candidate.tofNSigmaKa()) < cfgnSigmaCutTPCorTOFHigherPt) {
if (!(flag2 > 1) && std::abs(partNsigmaTpcOrItsPi) > cfgnSigmaSeperationCut && std::abs(candidate.tofNSigmaPi()) > cfgnSigmaSeperationCut && std::abs(partNsigmaTpcOrItsPr) > cfgnSigmaSeperationCut && std::abs(candidate.tofNSigmaPr()) > cfgnSigmaSeperationCut)
flag = 1;
}
Expand Down
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