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[PWGLF] Added MC truth matching for nSigmaTPC histograms #14342

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[PWGLF] Added MC truth matching for nSigmaTPC histograms #14342

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tonmoySh Dec 23, 2025
492e76a
Fix whitespace and comma formatting issues in spectraTOF.cxx
tonmoySh Dec 24, 2025
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47 changes: 47 additions & 0 deletions PWGLF/Tasks/Nuspex/spectraTOF.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -78,6 +78,8 @@

std::array<std::shared_ptr<TH2>, NpCharge> hPtNumTOFMatchWithPIDSignalPrm; // Pt distribution of particles with a hit in the TOF and a compatible signal

std::array<std::array<std::shared_ptr<TH3>, NpCharge>, 3> hMCpdg_nsigmaTPC; // 2D array of nsigmaTPC histograms [Selection: pi,K,p][True PDG: 18 species]

// Spectra task
struct tofSpectra {
struct : ConfigurableGroup {
Expand Down Expand Up @@ -585,6 +587,13 @@
histos.add("MC/MultiplicityMCINELgt0", "MC multiplicity", kTH1D, {multAxis});
histos.add("MC/MultiplicityMCINELgt1", "MC multiplicity", kTH1D, {multAxis});
}
if (doprocessTrackMCLabels) {
for (int par = 2; par <= 4; par++) {
for (int i = 0; i < NpCharge; i++) {
hMCpdg_nsigmaTPC[par - 2][i] = histos.add<TH3>(Form("test_mclabels/nsigmatpc/%s/%s/pdg_%i", (i < Np) ? "pos" : "neg", pN[par], PDGs[i % Np]), Form("True %s (%i) in %s selection", pTCharge[i], PDGs[i], (i < Np) ? pTCharge[par] : pTCharge[par + Np]), kTH3D, {ptAxis, nsigmaTPCAxisOccupancy, multAxis});
}
}
}

hMultiplicityvsPercentile = histos.add<TH2>("Mult/vsPercentile", "Multiplicity vs percentile", HistType::kTH2D, {{150, 0, 150}, {100, 0, 100, "Track multiplicity"}});

Expand Down Expand Up @@ -1497,9 +1506,9 @@
if (mcParticle.isPhysicalPrimary()) {
if (isTPCPion && rapidityPi <= trkselOptions.cfgCutY) {
if (usePDGcode) {
if (pdgCode == 211) {

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[pdg/explicit-code] 

Avoid hard-coded PDG codes. Use named values from PDG_t or o2::constants::physics::Pdg instead.
histos.fill(HIST("nsigmatpc/mc_closure/pos/pi"), track.pt(), nsigmaTPCPi, multiplicity);
} else if (pdgCode == -211) {

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[pdg/explicit-code] 

Avoid hard-coded PDG codes. Use named values from PDG_t or o2::constants::physics::Pdg instead.
histos.fill(HIST("nsigmatpc/mc_closure/neg/pi"), track.pt(), nsigmaTPCPi, multiplicity);
}
} else {
Expand All @@ -1509,9 +1518,9 @@
}
if (isTPCKaon && rapidityKa <= trkselOptions.cfgCutY) {
if (usePDGcode) {
if (pdgCode == 321) {

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[pdg/explicit-code] 

Avoid hard-coded PDG codes. Use named values from PDG_t or o2::constants::physics::Pdg instead.
histos.fill(HIST("nsigmatpc/mc_closure/pos/ka"), track.pt(), nsigmaTPCKa, multiplicity);
} else if (pdgCode == -321) {

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[pdg/explicit-code] 

Avoid hard-coded PDG codes. Use named values from PDG_t or o2::constants::physics::Pdg instead.
histos.fill(HIST("nsigmatpc/mc_closure/neg/ka"), track.pt(), nsigmaTPCKa, multiplicity);
}
} else {
Expand All @@ -1521,9 +1530,9 @@
}
if (isTPCProton && rapidityPr <= trkselOptions.cfgCutY) {
if (usePDGcode) {
if (pdgCode == 2212) {

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[pdg/explicit-code] 

Avoid hard-coded PDG codes. Use named values from PDG_t or o2::constants::physics::Pdg instead.
histos.fill(HIST("nsigmatpc/mc_closure/pos/pr"), track.pt(), nsigmaTPCPr, multiplicity);
} else if (pdgCode == -2212) {

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[pdg/explicit-code] 

Avoid hard-coded PDG codes. Use named values from PDG_t or o2::constants::physics::Pdg instead.
histos.fill(HIST("nsigmatpc/mc_closure/neg/pr"), track.pt(), nsigmaTPCPr, multiplicity);
}
} else {
Expand All @@ -1535,9 +1544,9 @@
// TOF Selection and Histogram Filling
if (isTOFPion && rapidityPi <= trkselOptions.cfgCutY) {
if (usePDGcode) {
if (pdgCode == 211) {

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[pdg/explicit-code] 

Avoid hard-coded PDG codes. Use named values from PDG_t or o2::constants::physics::Pdg instead.
histos.fill(HIST("nsigmatof/mc_closure/pos/pi"), track.pt(), nsigmaTOFPi, multiplicity);
} else if (pdgCode == -211) {

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[pdg/explicit-code] 

Avoid hard-coded PDG codes. Use named values from PDG_t or o2::constants::physics::Pdg instead.
histos.fill(HIST("nsigmatof/mc_closure/neg/pi"), track.pt(), nsigmaTOFPi, multiplicity);
}
} else {
Expand All @@ -1547,7 +1556,7 @@
}
if (isTOFKaon && rapidityKa <= trkselOptions.cfgCutY) {
if (usePDGcode) {
if (pdgCode == 321) {

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[pdg/explicit-code] 

Avoid hard-coded PDG codes. Use named values from PDG_t or o2::constants::physics::Pdg instead.
histos.fill(HIST("nsigmatof/mc_closure/pos/ka"), track.pt(), nsigmaTOFKa, multiplicity);
} else if (pdgCode == -321) {
histos.fill(HIST("nsigmatof/mc_closure/neg/ka"), track.pt(), nsigmaTOFKa, multiplicity);
Expand Down Expand Up @@ -1601,7 +1610,7 @@
for (const auto& track : tracks) {
// Track selection criteria
/* if (track.tpcNClsCrossedRows() < minNCrossedRowsTPC || track.tpcChi2NCl() > maxChi2PerClusterTPC || track.tpcChi2NCl() > maxChi2PerClusterTPC ||
track.itsChi2NCl() > maxChi2PerClusterITS || std::abs(track.dcaXY()) > maxDcaXYFactor.value * (0.0105f + 0.0350f / pow(track.pt(), 1.1f)) || std::abs(track.dcaZ()) > maxDcaZ.value || track.eta() < trkselOptions.cfgCutEtaMin || track.eta() > trkselOptions.cfgCutEtaMax || track.tpcCrossedRowsOverFindableCls() < minNCrossedRowsOverFindableClustersTPC || track.tpcNClsFound() < minTPCNClsFound ||

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[std-prefix] 

Use std:: prefix for names from the std namespace.
!(o2::aod::track::ITSrefit) || !(o2::aod::track::TPCrefit)) {
continue;
}*/
Expand Down Expand Up @@ -2785,6 +2794,44 @@
}
}
PROCESS_SWITCH(tofSpectra, processMCgen_RecoEvs, "process generated MC (reconstructed events)", false);
void processTrackMCLabels(CollisionCandidates::iterator const& collisions,
soa::Join<TrackCandidates,
aod::pidTPCFullPi, aod::pidTPCFullKa, aod::pidTPCFullPr,
aod::pidTOFFullPi, aod::pidTOFFullKa, aod::pidTOFFullPr> const& tracks,
aod::McTrackLabels const& mcTrackLabels, aod::McParticles const& mcParticles)
{
const float multiplicity = getMultiplicity(collisions);
for (const auto& track : tracks) {
if (!track.has_collision()) {
continue;
}
const auto& collision = track.collision_as<CollisionCandidates>();
if (!isEventSelected<false, false>(collision)) {
continue;
}
if (!isTrackSelected<true>(track, collision)) {
continue;
}
const auto& mcLabel = mcTrackLabels.iteratorAt(track.globalIndex());
const auto& mcParticle = mcParticles.iteratorAt(mcLabel.mcParticleId());
int pdgCode = mcParticle.pdgCode();
static_for<2, 4>([&](auto par) {
const auto& nsigmaTPCpar = o2::aod::pidutils::tpcNSigma<par>(track);
bool isTPCpar = std::abs(nsigmaTPCpar) < trkselOptions.cfgCutNsigma;
// Precompute rapidity values to avoid redundant calculations
double rapiditypar = std::abs(track.rapidity(PID::getMass(par)));
// TPC Selection and histogram filling
if (isTPCpar && rapiditypar <= trkselOptions.cfgCutY) {
static_for<0, 17>([&](auto i) {
if (pdgCode == PDGs[i]) {
hMCpdg_nsigmaTPC[par - 2][i]->Fill(track.pt(), nsigmaTPCpar, multiplicity);
}
});
}
});
}
}
PROCESS_SWITCH(tofSpectra, processTrackMCLabels, "Fill track histograms using MC matched PDG labels", false);

}; // end of spectra task

Expand Down
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