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[PWGLF] updated primary and secondary selections, fix multiplicity determination, include histos for decay mothers #18625

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[PWGLF] updated primary and secondary selections, fix multiplicity determination, include histos for decay mothers #18625

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fa66537
updated primary and secondary selections
Nov 6, 2026
d201ded
fixed conflicts
Nov 6, 2026
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149 changes: 100 additions & 49 deletions PWGLF/TableProducer/Nuspex/particleCompositionCorrection.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,8 @@
#include <tuple>
#include <vector>

// #include "Framework/Logger.h"

using namespace o2;
using namespace o2::framework;
using namespace o2::ml;
Expand All @@ -64,6 +66,7 @@ struct ParticleCompositionCorrection {

Configurable<bool> skipAll{"skipAll", false, "run table producer in dummy mode, i.e. skip all computations and fill with 1"};
Configurable<bool> skipSec{"skipSec", false, "dont calculate weights for secondaries"};
Configurable<bool> skipNeutralSec{"skipNeutralSec", true, "dont calculate weights for neutral secondaries"};
Configurable<bool> skipNonPhysicalPrim{"skipNonPhysicalPrim", true, "dont calculate weights for particles that are not (originating from) physical primaries; i.e. reject (decays of) pi0 etc."};
Configurable<float> etaCut{"etaCut", 0.8f, "eta cut"};
Configurable<float> ptMinCut{"ptMinCut", 0.15f, "pt min cut"};
Expand Down Expand Up @@ -118,6 +121,7 @@ void ParticleCompositionCorrection::init(InitContext const&)
const int maxMult = 100;
const int nBinsMult = maxMult + 1;
const AxisSpec multAxis = {nBinsMult, -0.5, nBinsMult - 0.5, "#it{N}_{ch}", "mult"};
const AxisSpec processAxis = {51, -0.5, 50.5, "process", "process"};

histos.add("multDist_INELg0", "", kTH1D, {multAxis});
histos.add("multDist_fid", "", kTH1D, {multAxis});
Expand All @@ -127,47 +131,64 @@ void ParticleCompositionCorrection::init(InitContext const&)
histos.add("frac/data/proton", "", kTProfile, {ptAxis});
histos.add("frac/data/sigma", "", kTProfile, {ptAxis});

histos.add("frac/data/kaon_mult", "", kTProfile2D, {multAxis, ptAxis});
histos.add("frac/data/proton_mult", "", kTProfile2D, {multAxis, ptAxis});
histos.add("frac/data/sigma_mult", "", kTProfile2D, {multAxis, ptAxis});

histos.addClone("frac/data/", "frac/mc/");

histos.add("weight/kaon", "", kTProfile, {ptAxis});
histos.add("weight/proton", "", kTProfile, {ptAxis});
histos.add("weight/sigma", "", kTProfile, {ptAxis});

histos.add("weight/kaon_mult", "", kTProfile2D, {multAxis, ptAxis});
histos.add("weight/proton_mult", "", kTProfile2D, {multAxis, ptAxis});
histos.add("weight/sigma_mult", "", kTProfile2D, {multAxis, ptAxis});

histos.add("weight/prim", "", kTProfile, {ptAxis});
histos.add("weight/secDec", "", kTProfile, {ptAxis});
histos.add("weight/secMat", "", kTProfile, {ptAxis});

histos.add("weight/secDec_mult", "", kTProfile2D, {multAxis, ptAxis});
histos.add("weight/secMat_mult", "", kTProfile2D, {multAxis, ptAxis});
}
}

std::tuple<float, float, float> ParticleCompositionCorrection::getWeights(aod::McParticles const& particles, aod::McParticles::iterator const& particle, std::map<int32_t, std::tuple<float, float, float>>& storedWeights, float dNdEta)
{
static const std::tuple<float, float, float> noWeights = {1.f, 1.f, 1.f};

if (skipAll || std::abs(particle.eta()) > etaCut || particle.pt() < ptMinCut || particle.pt() > ptMaxCut) {
static constexpr int kXi0PDG = 3322;

/* if (skipAll || std::abs(particle.eta()) > etaCut || particle.pt() < ptMinCut || particle.pt() > ptMaxCut) {
return noWeights;
} */

if (skipAll) {
return noWeights;
}

if (particle.producedByGenerator()) {
if (skipNonPhysicalPrim && !particle.isPhysicalPrimary()) {
return noWeights;
}
if (!particle.has_mothers()) {
return noWeights;
}

auto particleMother = particle.mothersIds()[0] - particles.offset();

// if (particle.producedByGenerator()) {

if (particleMother == 0. || particleMother == 1. ||
(particle.isPhysicalPrimary() && skipNonPhysicalPrim)) {

auto absPDGCode = std::abs(particle.pdgCode());
// translate abs PDG code to PID variable of neural networks (0: pion, 1: kaon, 2: proton, 3: sigma)

if (absPDGCode == PDG_t::kPiPlus || absPDGCode == PDG_t::kPi0) {

return noWeights;
}

if (skipNonPhysicalPrim && !particle.isPhysicalPrimary()) {
return noWeights;
}

if (!particle.has_daughters()) {

if (particle.eta() > etaCut || particle.pt() > ptMaxCut || particle.pt() < ptMinCut) {

return noWeights;
}
}

// translate abs PDG code to PID variable of neural networks (0: pion, 1: kaon, 2: proton, 3: sigma)

static const std::map<int, float> mapPID = {
{PDG_t::kPiPlus, 0.f},
{PDG_t::kPi0, 0.f},
Expand All @@ -181,79 +202,106 @@ std::tuple<float, float, float> ParticleCompositionCorrection::getWeights(aod::M
{PDG_t::kLambda0, 3.f},
{PDG_t::kSigma0, 3.f},
{PDG_t::kXiMinus, 3.f},
// TODO: potentially extend by xi0/eta/omega/rho/phi/Delta...
{kXi0PDG, 3.f}, // Xi0
{PDG_t::kOmegaMinus, 3.f},
// TODO: potentially extend by eta/omega/rho/phi/Delta...
// pdg codes defined in AliceO2/Common/Constants/include/CommonConstants/PhysicsConstants.h
// e.g. o2::constants::physics::Pdg::kEta
};

if (auto iterMapPID = mapPID.find(absPDGCode); iterMapPID != mapPID.end()) {
// LOGP(info, "scaling a {} with status code {} from process {}", particle.pdgCode(), particle.getGenStatusCode(), particle.getProcess());
float pt = particle.pt();

// calculate particle fractions and corresponding weight for given reference particle
std::vector<std::vector<float>> input = {{dNdEta}, {pt}, {iterMapPID->second}};
std::vector<std::vector<float>> input = {{dNdEta}, {particle.pt()}, {iterMapPID->second}};
float fracData = particleFractionsData.evalModel(input)[0];
float fracMC = particleFractionsMC.evalModel(input)[0];
float weight = (fracMC) ? fracData / fracMC : 1.f;
std::tuple<float, float, float> weights = {weight, weight, weight};
if (!skipSec && particle.has_daughters()) {
storedWeights[particle.index()] = weights;
}
if (enableQAHistos && particle.isPhysicalPrimary() && std::abs(particle.eta()) < 0.8) { // o2-linter: disable=magic-number (usual range of charged-partilce measurements)
if (enableQAHistos && particle.isPhysicalPrimary() && std::abs(particle.eta()) < etaCut) {
if (iterMapPID->first == PDG_t::kKPlus) {
histos.fill(HIST("frac/data/kaon"), pt, fracData);
histos.fill(HIST("frac/mc/kaon"), pt, fracMC);
histos.fill(HIST("frac/data/kaon_mult"), dNdEta, pt, fracData);
histos.fill(HIST("frac/mc/kaon_mult"), dNdEta, pt, fracMC);
histos.fill(HIST("weight/kaon"), pt, weight);
histos.fill(HIST("weight/kaon_mult"), dNdEta, pt, weight);
histos.fill(HIST("frac/data/kaon"), particle.pt(), fracData);
histos.fill(HIST("frac/mc/kaon"), particle.pt(), fracMC);
histos.fill(HIST("weight/kaon"), particle.pt(), weight);
}
if (iterMapPID->first == PDG_t::kProton) {
histos.fill(HIST("frac/data/proton"), pt, fracData);
histos.fill(HIST("frac/mc/proton"), pt, fracMC);
histos.fill(HIST("frac/data/proton_mult"), dNdEta, pt, fracData);
histos.fill(HIST("frac/mc/proton_mult"), dNdEta, pt, fracMC);
histos.fill(HIST("weight/proton"), pt, weight);
histos.fill(HIST("weight/proton_mult"), dNdEta, pt, weight);
histos.fill(HIST("frac/data/proton"), particle.pt(), fracData);
histos.fill(HIST("frac/mc/proton"), particle.pt(), fracMC);
histos.fill(HIST("weight/proton"), particle.pt(), weight);
}
if (iterMapPID->first == PDG_t::kSigmaPlus || iterMapPID->first == PDG_t::kSigmaMinus) {
histos.fill(HIST("frac/data/sigma"), pt, fracData);
histos.fill(HIST("frac/mc/sigma"), pt, fracMC);
histos.fill(HIST("frac/data/sigma_mult"), dNdEta, pt, fracData);
histos.fill(HIST("frac/mc/sigma_mult"), dNdEta, pt, fracMC);
histos.fill(HIST("weight/sigma"), pt, weight);
histos.fill(HIST("weight/sigma_mult"), dNdEta, pt, weight);
histos.fill(HIST("frac/data/sigma"), particle.pt(), fracData);
histos.fill(HIST("frac/mc/sigma"), particle.pt(), fracMC);
histos.fill(HIST("weight/sigma"), particle.pt(), weight);
}

histos.fill(HIST("weight/prim"), particle.pt(), weight);
}

return weights;
}

} else if (!skipSec) {

auto refParticleID = particle.index();
// LOGP(error, "Particle [{}] {} from process {}", refParticleID, particle.pdgCode(), particle.getProcess());
while (!particles.iteratorAt(refParticleID).producedByGenerator() && particles.iteratorAt(refParticleID).has_mothers()) {
auto pdgParticle = pdg->GetParticle(particle.pdgCode());

if (!pdgParticle) {
// LOGP(info, "Unknown PDG code: {}", particle.pdgCode());
// return noWeights;
} else {

if (skipNeutralSec && pdgParticle->Charge() == 0.) {
return noWeights;
}
}

if (particle.eta() > etaCut || particle.pt() > ptMaxCut || particle.pt() < ptMinCut) {
return noWeights;
}

while (particles.iteratorAt(refParticleID).has_mothers()) {

auto motherID = particles.iteratorAt(refParticleID).mothersIds()[0] - particles.offset();
// LOGP(error, "-> mom [{}] {} from process {}", motherID, particles.iteratorAt(motherID).pdgCode(), particles.iteratorAt(motherID).getProcess());

auto mom = particles.iteratorAt(motherID);

if (!mom.has_mothers()) {
break;
}

refParticleID = motherID;

if (mom.isPhysicalPrimary() && skipNonPhysicalPrim) {
break;
}
}

if (refParticleID == 0 || refParticleID == 1) {
LOGF(error, "GLOBAL MOTHER IS INCIDING PROTON");
}

if (storedWeights.find(refParticleID) == storedWeights.end()) {
// LOGP(error, " no ref particle stored for particle {} from process {}!!", particle.pdgCode(), particle.getProcess());
// LOGP(info, "MCB: no ref stored for mom {}, PDG: {}!!", particles.iteratorAt(refParticleID).index(),particles.iteratorAt(refParticleID).pdgCode());
return noWeights;
}

if (enableQAHistos) {

float weight = get<0>(storedWeights.at(refParticleID));
auto pdgParticle = pdg->GetParticle(particle.pdgCode());

if (pdgParticle && pdgParticle->Charge() != 0.) {
if (particle.getProcess() == TMCProcess::kPDecay) {
if (particle.getProcess() == TMCProcess::kPDecay || particle.getProcess() == TMCProcess::kPPrimary) {
histos.fill(HIST("weight/secDec"), particle.pt(), weight);
histos.fill(HIST("weight/secDec_mult"), dNdEta, particle.pt(), weight);
} else if (particle.getProcess() == TMCProcess::kPHInhelastic || particle.getProcess() == TMCProcess::kPHadronic || particle.getProcess() == TMCProcess::kPHElastic) {
// } else if (particle.getProcess() == TMCProcess::kPHInhelastic || particle.getProcess() == TMCProcess::kPHadronic || particle.getProcess() == TMCProcess::kPHElastic) {
} else {
histos.fill(HIST("weight/secMat"), particle.pt(), weight);
histos.fill(HIST("weight/secMat_mult"), dNdEta, particle.pt(), weight);
}
}
}

return storedWeights.at(refParticleID);
}
return noWeights;
Expand All @@ -266,6 +314,7 @@ void ParticleCompositionCorrection::process(aod::McCollisions::iterator const&,
float dNdEtafid = 0.f;

for (const auto& particle : particles) {

if (!particle.isPhysicalPrimary()) {
continue;
}
Expand All @@ -288,6 +337,8 @@ void ParticleCompositionCorrection::process(aod::McCollisions::iterator const&,
histos.fill(HIST("multDist_fidVsINELg0"), dNdEta, dNdEtafid);
}

// LOGP(info, "MCB: ------- New event with dNdeta = {} in |eta| < 0.8 -------", dNdEtafid);

std::map<int32_t, std::tuple<float, float, float>> storedWeights;
for (const auto& particle : particles) {
auto [weight, weightSysUp, weightSysDown] = getWeights(particles, particle, storedWeights, dNdEta);
Expand Down
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