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[PWGCF] FemtoUniverse: Add electron TPCNsigma rejection in pion selection #12792

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Merged
prchakra merged 1 commit into from
Aug 29, 2025
+14 −13
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[PWGCF] FemtoUniverse: Add electron TPCNsigma rejection in pion selection #12792

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27 changes: 14 additions & 13 deletions PWGCF/FemtoUniverse/Tasks/femtoUniversePairTaskTrackTrackSpherHarMultKtExtended.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -68,6 +68,7 @@
struct : o2::framework::ConfigurableGroup {
Configurable<float> ConfNsigmaCombined{"ConfNsigmaCombined", 3.0f, "TPC and TOF Pion Sigma (combined) for momentum > ConfTOFPtMin"};
Configurable<float> ConfNsigmaTPC{"ConfNsigmaTPC", 3.0f, "TPC Pion Sigma for momentum < ConfTOFPtMin"};
Configurable<float> ConfNsigmaTPCElReject{"ConfNsigmaTPCElReject", 2.0f, "TPC Electron Sigma for momentum < ConfTOFPtMin"};
Configurable<float> ConfTOFPtMin{"ConfTOFPtMin", 0.5f, "Min. Pt for which TOF is required for PID."};
Configurable<float> ConfEtaMax{"ConfEtaMax", 0.8f, "Higher limit for |Eta| (the same for both particles)"};

Expand Down Expand Up @@ -269,34 +270,34 @@

bool IsKaonNSigma(float mom, float nsigmaTPCK, float nsigmaTOFK)
{
if (mom < 0.3) { // 0.0-0.3

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
if (std::abs(nsigmaTPCK) < 3.0) {

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
return true;
} else {
return false;
}
} else if (mom < 0.45) { // 0.30 - 0.45

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
if (std::abs(nsigmaTPCK) < 2.0) {

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
return true;
} else {
return false;
}
} else if (mom < 0.55) { // 0.45-0.55

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
if (std::abs(nsigmaTPCK) < 1.0) {
return true;
} else {
return false;
}
} else if (mom < 1.5) { // 0.55-1.5 (now we use TPC and TOF)

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
if ((std::abs(nsigmaTOFK) < 3.0) && (std::abs(nsigmaTPCK) < 3.0)) {

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
{
return true;
}
} else {
return false;
}
} else if (mom > 1.5) { // 1.5 -

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
if ((std::abs(nsigmaTOFK) < 2.0) && (std::abs(nsigmaTPCK) < 3.0)) {

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
return true;
} else {
return false;
Expand All @@ -306,7 +307,7 @@
}
}

bool IsPionNSigma(float mom, float nsigmaTPCPi, float nsigmaTOFPi)
bool IsPionNSigma(float mom, float nsigmaTPCPi, float nsigmaTOFPi, float nsigmaTPCElReject)
{
//|nsigma_TPC| < 3 for p < 0.5 GeV/c
//|nsigma_combined| < 3 for p > 0.5
Expand All @@ -317,7 +318,7 @@
// ConfNsigmaCombined -> TPC and TOF Pion Sigma (combined) for momentum > 0.5
if (true) {
if (mom < twotracksconfigs.ConfTOFPtMin) {
if (std::abs(nsigmaTPCPi) < twotracksconfigs.ConfNsigmaTPC) {
if ((std::abs(nsigmaTPCPi) < twotracksconfigs.ConfNsigmaTPC) && (std::abs(nsigmaTPCElReject) > twotracksconfigs.ConfNsigmaTPCElReject)) {
return true;
} else {
return false;
Expand All @@ -333,7 +334,7 @@
return false;
}

bool IsParticleNSigma(int8_t particle_number, float mom, float nsigmaTPCPr, float nsigmaTOFPr, float nsigmaTPCPi, float nsigmaTOFPi, float nsigmaTPCK, float nsigmaTOFK)
bool IsParticleNSigma(int8_t particle_number, float mom, float nsigmaTPCPr, float nsigmaTOFPr, float nsigmaTPCPi, float nsigmaTOFPi, float nsigmaTPCK, float nsigmaTOFK, float nsigmaTPCElReject)
{
if (particle_number == 1) {
switch (trackonefilter.ConfPDGCodePartOne) {
Expand All @@ -343,7 +344,7 @@
break;
case 211: // Pion+
case -211: // Pion-
return IsPionNSigma(mom, nsigmaTPCPi, nsigmaTOFPi);
return IsPionNSigma(mom, nsigmaTPCPi, nsigmaTOFPi, nsigmaTPCElReject);
break;
case 321: // Kaon+
case -321: // Kaon-
Expand All @@ -353,7 +354,7 @@
return false;
}
return false;
} else if (particle_number == 2) {

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
switch (tracktwofilter.ConfPDGCodePartTwo) {
case 2212: // Proton
case -2212: // Antiproton
Expand All @@ -361,7 +362,7 @@
break;
case 211: // Pion+
case -211: // Pion-
return IsPionNSigma(mom, nsigmaTPCPi, nsigmaTOFPi);
return IsPionNSigma(mom, nsigmaTPCPi, nsigmaTOFPi, nsigmaTPCElReject);
break;
case 321: // Kaon+
case -321: // Kaon-
Expand Down Expand Up @@ -468,7 +469,7 @@
/// Histogramming same event
if ((ContType == 1 || ContType == 2) && fillQA) {
for (const auto& part : groupPartsOne) {
if (!IsParticleNSigma((int8_t)1, part.p(), trackCuts.getNsigmaTPC(part, o2::track::PID::Proton), trackCuts.getNsigmaTOF(part, o2::track::PID::Proton), trackCuts.getNsigmaTPC(part, o2::track::PID::Pion), trackCuts.getNsigmaTOF(part, o2::track::PID::Pion), trackCuts.getNsigmaTPC(part, o2::track::PID::Kaon), trackCuts.getNsigmaTOF(part, o2::track::PID::Kaon))) {
if (!IsParticleNSigma((int8_t)1, part.p(), trackCuts.getNsigmaTPC(part, o2::track::PID::Proton), trackCuts.getNsigmaTOF(part, o2::track::PID::Proton), trackCuts.getNsigmaTPC(part, o2::track::PID::Pion), trackCuts.getNsigmaTOF(part, o2::track::PID::Pion), trackCuts.getNsigmaTPC(part, o2::track::PID::Kaon), trackCuts.getNsigmaTOF(part, o2::track::PID::Kaon), trackCuts.getNsigmaTPC(part, o2::track::PID::Electron))) {
continue;
}
trackHistoPartOne.fillQA<isMC, true>(part);
Expand All @@ -478,7 +479,7 @@

if ((ContType == 1 || ContType == 3) && fillQA) {
for (const auto& part : groupPartsTwo) {
if (!IsParticleNSigma((int8_t)2, part.p(), trackCuts.getNsigmaTPC(part, o2::track::PID::Proton), trackCuts.getNsigmaTOF(part, o2::track::PID::Proton), trackCuts.getNsigmaTPC(part, o2::track::PID::Pion), trackCuts.getNsigmaTOF(part, o2::track::PID::Pion), trackCuts.getNsigmaTPC(part, o2::track::PID::Kaon), trackCuts.getNsigmaTOF(part, o2::track::PID::Kaon))) {
if (!IsParticleNSigma((int8_t)2, part.p(), trackCuts.getNsigmaTPC(part, o2::track::PID::Proton), trackCuts.getNsigmaTOF(part, o2::track::PID::Proton), trackCuts.getNsigmaTPC(part, o2::track::PID::Pion), trackCuts.getNsigmaTOF(part, o2::track::PID::Pion), trackCuts.getNsigmaTPC(part, o2::track::PID::Kaon), trackCuts.getNsigmaTOF(part, o2::track::PID::Kaon), trackCuts.getNsigmaTPC(part, o2::track::PID::Electron))) {
continue;
}
trackHistoPartTwo.fillQA<isMC, true>(part);
Expand All @@ -490,11 +491,11 @@
/// Now build the combinations for non-identical particle pairs
for (const auto& [p1, p2] : combinations(CombinationsFullIndexPolicy(groupPartsOne, groupPartsTwo))) {

if (!IsParticleNSigma((int8_t)1, p1.p(), trackCuts.getNsigmaTPC(p1, o2::track::PID::Proton), trackCuts.getNsigmaTOF(p1, o2::track::PID::Proton), trackCuts.getNsigmaTPC(p1, o2::track::PID::Pion), trackCuts.getNsigmaTOF(p1, o2::track::PID::Pion), trackCuts.getNsigmaTPC(p1, o2::track::PID::Kaon), trackCuts.getNsigmaTOF(p1, o2::track::PID::Kaon))) {
if (!IsParticleNSigma((int8_t)1, p1.p(), trackCuts.getNsigmaTPC(p1, o2::track::PID::Proton), trackCuts.getNsigmaTOF(p1, o2::track::PID::Proton), trackCuts.getNsigmaTPC(p1, o2::track::PID::Pion), trackCuts.getNsigmaTOF(p1, o2::track::PID::Pion), trackCuts.getNsigmaTPC(p1, o2::track::PID::Kaon), trackCuts.getNsigmaTOF(p1, o2::track::PID::Kaon), trackCuts.getNsigmaTPC(p1, o2::track::PID::Electron))) {
continue;
}

if (!IsParticleNSigma((int8_t)2, p2.p(), trackCuts.getNsigmaTPC(p2, o2::track::PID::Proton), trackCuts.getNsigmaTOF(p2, o2::track::PID::Proton), trackCuts.getNsigmaTPC(p2, o2::track::PID::Pion), trackCuts.getNsigmaTOF(p2, o2::track::PID::Pion), trackCuts.getNsigmaTPC(p2, o2::track::PID::Kaon), trackCuts.getNsigmaTOF(p2, o2::track::PID::Kaon))) {
if (!IsParticleNSigma((int8_t)2, p2.p(), trackCuts.getNsigmaTPC(p2, o2::track::PID::Proton), trackCuts.getNsigmaTOF(p2, o2::track::PID::Proton), trackCuts.getNsigmaTPC(p2, o2::track::PID::Pion), trackCuts.getNsigmaTOF(p2, o2::track::PID::Pion), trackCuts.getNsigmaTPC(p2, o2::track::PID::Kaon), trackCuts.getNsigmaTOF(p2, o2::track::PID::Kaon), trackCuts.getNsigmaTPC(p2, o2::track::PID::Electron))) {
continue;
}

Expand All @@ -520,11 +521,11 @@
} else {
for (const auto& [p1, p2] : combinations(CombinationsStrictlyUpperIndexPolicy(groupPartsOne, groupPartsOne))) {

if (!IsParticleNSigma((int8_t)2, p1.p(), trackCuts.getNsigmaTPC(p1, o2::track::PID::Proton), trackCuts.getNsigmaTOF(p1, o2::track::PID::Proton), trackCuts.getNsigmaTPC(p1, o2::track::PID::Pion), trackCuts.getNsigmaTOF(p1, o2::track::PID::Pion), trackCuts.getNsigmaTPC(p1, o2::track::PID::Kaon), trackCuts.getNsigmaTOF(p1, o2::track::PID::Kaon))) {
if (!IsParticleNSigma((int8_t)2, p1.p(), trackCuts.getNsigmaTPC(p1, o2::track::PID::Proton), trackCuts.getNsigmaTOF(p1, o2::track::PID::Proton), trackCuts.getNsigmaTPC(p1, o2::track::PID::Pion), trackCuts.getNsigmaTOF(p1, o2::track::PID::Pion), trackCuts.getNsigmaTPC(p1, o2::track::PID::Kaon), trackCuts.getNsigmaTOF(p1, o2::track::PID::Kaon), trackCuts.getNsigmaTPC(p1, o2::track::PID::Electron))) {
continue;
}

if (!IsParticleNSigma((int8_t)2, p2.p(), trackCuts.getNsigmaTPC(p2, o2::track::PID::Proton), trackCuts.getNsigmaTOF(p2, o2::track::PID::Proton), trackCuts.getNsigmaTPC(p2, o2::track::PID::Pion), trackCuts.getNsigmaTOF(p2, o2::track::PID::Pion), trackCuts.getNsigmaTPC(p2, o2::track::PID::Kaon), trackCuts.getNsigmaTOF(p2, o2::track::PID::Kaon))) {
if (!IsParticleNSigma((int8_t)2, p2.p(), trackCuts.getNsigmaTPC(p2, o2::track::PID::Proton), trackCuts.getNsigmaTOF(p2, o2::track::PID::Proton), trackCuts.getNsigmaTPC(p2, o2::track::PID::Pion), trackCuts.getNsigmaTOF(p2, o2::track::PID::Pion), trackCuts.getNsigmaTPC(p2, o2::track::PID::Kaon), trackCuts.getNsigmaTOF(p2, o2::track::PID::Kaon), trackCuts.getNsigmaTPC(p2, o2::track::PID::Electron))) {
continue;
}

Expand Down Expand Up @@ -700,11 +701,11 @@

for (const auto& [p1, p2] : combinations(CombinationsFullIndexPolicy(groupPartsOne, groupPartsTwo))) {

if (!IsParticleNSigma((int8_t)2, p1.p(), trackCuts.getNsigmaTPC(p1, o2::track::PID::Proton), trackCuts.getNsigmaTOF(p1, o2::track::PID::Proton), trackCuts.getNsigmaTPC(p1, o2::track::PID::Pion), trackCuts.getNsigmaTOF(p1, o2::track::PID::Pion), trackCuts.getNsigmaTPC(p1, o2::track::PID::Kaon), trackCuts.getNsigmaTOF(p1, o2::track::PID::Kaon))) {
if (!IsParticleNSigma((int8_t)2, p1.p(), trackCuts.getNsigmaTPC(p1, o2::track::PID::Proton), trackCuts.getNsigmaTOF(p1, o2::track::PID::Proton), trackCuts.getNsigmaTPC(p1, o2::track::PID::Pion), trackCuts.getNsigmaTOF(p1, o2::track::PID::Pion), trackCuts.getNsigmaTPC(p1, o2::track::PID::Kaon), trackCuts.getNsigmaTOF(p1, o2::track::PID::Kaon), trackCuts.getNsigmaTPC(p1, o2::track::PID::Electron))) {
continue;
}

if (!IsParticleNSigma((int8_t)2, p2.p(), trackCuts.getNsigmaTPC(p2, o2::track::PID::Proton), trackCuts.getNsigmaTOF(p2, o2::track::PID::Proton), trackCuts.getNsigmaTPC(p2, o2::track::PID::Pion), trackCuts.getNsigmaTOF(p2, o2::track::PID::Pion), trackCuts.getNsigmaTPC(p2, o2::track::PID::Kaon), trackCuts.getNsigmaTOF(p2, o2::track::PID::Kaon))) {
if (!IsParticleNSigma((int8_t)2, p2.p(), trackCuts.getNsigmaTPC(p2, o2::track::PID::Proton), trackCuts.getNsigmaTOF(p2, o2::track::PID::Proton), trackCuts.getNsigmaTPC(p2, o2::track::PID::Pion), trackCuts.getNsigmaTOF(p2, o2::track::PID::Pion), trackCuts.getNsigmaTPC(p2, o2::track::PID::Kaon), trackCuts.getNsigmaTOF(p2, o2::track::PID::Kaon), trackCuts.getNsigmaTPC(p2, o2::track::PID::Electron))) {
continue;
}

Expand Down
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