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[PWGJE] Added weighted-MC processes for jet background analysis #18754

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[PWGJE] Added weighted-MC processes for jet background analysis #18754

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48 changes: 31 additions & 17 deletions PWGJE/Core/JetFindingUtilities.h
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Original file line number Diff line number Diff line change
Expand Up @@ -336,6 +336,36 @@ void findJets(JetFinder& jetFinder, std::vector<fastjet::PseudoJet> const& input
}
}

/**
* Applies the particle status and charge selections shared by jet finding and background QA.
* Kinematic acceptance cuts are applied to the input particle table separately.
*/
template <typename T, typename U>
bool isParticleSelected(T const& particle, const std::string& particleSelection, int jetTypeParticleLevel, U const& pdgDatabase)
{
if (particleSelection == "PhysicalPrimary" && !particle.isPhysicalPrimary()) {
return false;
} else if (particleSelection == "HepMCStatus" && particle.getHepMCStatusCode() != 1) {
return false;
} else if (particleSelection == "GenStatus" && particle.getGenStatusCode() != 1) {
return false;
} else if (particleSelection == "PhysicalPrimaryAndHepMCStatus" && (!particle.isPhysicalPrimary() || particle.getHepMCStatusCode() != 1)) {
return false;
}
if (std::isinf(particle.eta())) {
return false;
}
auto pdgParticle = pdgDatabase->GetParticle(particle.pdgCode());
auto pdgCharge = pdgParticle ? std::abs(pdgParticle->Charge()) : -1.0;
if (jetTypeParticleLevel == static_cast<int>(JetType::charged) && pdgCharge < 3.0) {
return false;
}
if (jetTypeParticleLevel == static_cast<int>(JetType::neutral) && pdgCharge != 0.0) {
return false;
}
return true;
}

/**
* Adds particles to a fastjet inputParticles list
*
Expand All @@ -350,26 +380,10 @@ template <bool checkIsDaughter, typename T, typename U>
void analyseParticles(std::vector<fastjet::PseudoJet>& inputParticles, const std::string& particleSelection, int jetTypeParticleLevel, T const& particles, o2::framework::Service<o2::framework::O2DatabasePDG> pdgDatabase, const U* candidate = nullptr)
{
for (auto& particle : particles) {
if (particleSelection == "PhysicalPrimary" && !particle.isPhysicalPrimary()) { // CHECK : Does this exclude the HF hadron?
continue;
} else if (particleSelection == "HepMCStatus" && particle.getHepMCStatusCode() != 1) { // do we need isPhysicalPrimary as well? Note: Might give unforseen results if the generator isnt PYTHIA
continue;
} else if (particleSelection == "GenStatus" && particle.getGenStatusCode() != 1) {
continue;
} else if (particleSelection == "PhysicalPrimaryAndHepMCStatus" && (!particle.isPhysicalPrimary() || particle.getHepMCStatusCode() != 1)) {
continue;
}
if (std::isinf(particle.eta())) {
if (!isParticleSelected(particle, particleSelection, jetTypeParticleLevel, pdgDatabase)) {
continue;
}
auto pdgParticle = pdgDatabase->GetParticle(particle.pdgCode());
auto pdgCharge = pdgParticle ? std::abs(pdgParticle->Charge()) : -1.0;
if (jetTypeParticleLevel == static_cast<int>(JetType::charged) && pdgCharge < 3.0) {
continue;
}
if (jetTypeParticleLevel == static_cast<int>(JetType::neutral) && pdgCharge != 0.0) {
continue;
}
if constexpr (jetcandidateutilities::isMcCandidate<U>() && !jetv0utilities::isV0McCandidate<U>()) {
if (candidate != nullptr) {
if ((*candidate).mcParticleId() == particle.globalIndex()) {
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