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[PWGJE] fixed getDaughtersInChain function for GammaJetTrees #11859

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Merged
nzardosh merged 1 commit into from
Jul 1, 2025
Merged

[PWGJE] fixed getDaughtersInChain function for GammaJetTrees #11859

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33 changes: 16 additions & 17 deletions PWGJE/Tasks/gammaJetTreeProducer.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -477,7 +477,7 @@
/// \return true if particle is a prompt photon, false otherwise
bool isPromptPhoton(const auto& particle)
{
if (particle.pdgCode() == PDG_t::kGamma && particle.isPhysicalPrimary() && std::abs(particle.getGenStatusCode()) < 90) {

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
return true;
}
return false;
Expand All @@ -488,10 +488,10 @@
bool isDirectPromptPhoton(const auto& particle)
{
// check if particle isa prompt photon
if (particle.pdgCode() == PDG_t::kGamma && particle.isPhysicalPrimary() && std::abs(particle.getGenStatusCode()) < 90) {

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
// find the top carbon copy
auto topCopy = iTopCopy(particle);
if (topCopy.pdgCode() == PDG_t::kGamma && std::abs(topCopy.getGenStatusCode()) < 40) { // < 40 is particle directly produced in hard scattering

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
return true;
}
}
Expand All @@ -502,10 +502,10 @@
/// \return true if particle is a fragmentation photon, false otherwise
bool isFragmentationPhoton(const auto& particle)
{
if (particle.pdgCode() == PDG_t::kGamma && particle.isPhysicalPrimary() && std::abs(particle.getGenStatusCode()) < 90) {

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
// find the top carbon copy
auto topCopy = iTopCopy(particle);
if (topCopy.pdgCode() == PDG_t::kGamma && std::abs(topCopy.getGenStatusCode()) >= 40) { // frag photon

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
return true;
}
}
Expand All @@ -516,7 +516,7 @@
/// \return true if particle is a decay photon, false otherwise
bool isDecayPhoton(const auto& particle)
{
if (particle.pdgCode() == PDG_t::kGamma && particle.isPhysicalPrimary() && std::abs(particle.getGenStatusCode()) >= 90) {

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
return true;
}
return false;
Expand All @@ -527,7 +527,7 @@
template <typename T>
bool isDecayPhotonPi0(const T& particle)
{
if (particle.pdgCode() == PDG_t::kGamma && particle.isPhysicalPrimary() && std::abs(particle.getGenStatusCode()) >= 90) {

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
// check if it has mothers that are pi0s
const auto& mothers = particle.template mothers_as<aod::JMcParticles>();
for (const auto& mother : mothers) {
Expand All @@ -544,11 +544,11 @@
template <typename T>
bool isDecayPhotonEta(const T& particle)
{
if (particle.pdgCode() == PDG_t::kGamma && particle.isPhysicalPrimary() && std::abs(particle.getGenStatusCode()) >= 90) {

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
// check if it has mothers that are etas
const auto& mothers = particle.template mothers_as<aod::JMcParticles>();
for (const auto& mother : mothers) {
if (mother.pdgCode() == 221) {

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[pdg/explicit-code] 

Avoid hard-coded PDG codes. Use named values from PDG_t or o2::constants::physics::Pdg instead.
return true;
}
}
Expand All @@ -565,7 +565,7 @@
// check if you find a pi0 mother or a eta mother
const auto& mothers = particle.template mothers_as<aod::JMcParticles>();
for (const auto& mother : mothers) {
if (mother.pdgCode() == PDG_t::kPi0 || mother.pdgCode() == 221) {

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[pdg/explicit-code] 

Avoid hard-coded PDG codes. Use named values from PDG_t or o2::constants::physics::Pdg instead.
return false;
}
}
Expand Down Expand Up @@ -644,26 +644,23 @@
/// \param particle The particle to start from
/// \return Vector of daughter particle IDs
template <typename T>
std::vector<int> getDaughtersInChain(const T& particle, int depth = 0)
void getDaughtersInChain(const T& particle, std::vector<int>& daughters, int depth = 0)
{
std::vector<int> daughters;
// Limit recursion depth to avoid infinite loops
if (depth > kMaxRecursionDepth) { // 100 generations should be more than enough
return daughters;
return;
}
T currentParticle = particle;
while (currentParticle.has_daughters()) {
const auto& daughtersIDs = currentParticle.template daughters_as<aod::JMcParticles>();
for (const auto& daughter : daughtersIDs) {
daughters.push_back(daughter.globalIndex());
}
currentParticle = daughtersIDs.iteratorAt(0);
depth++;
if (depth > kMaxRecursionDepth) {
break;
}

if (!particle.has_daughters()) {
return;
}

const auto& daughterParticles = particle.template daughters_as<aod::JMcParticles>();
for (const auto& daughter : daughterParticles) {
daughters.push_back(daughter.globalIndex());
getDaughtersInChain(daughter, daughters, depth + 1);
}
return daughters;
return;
}
/// \brief Finds the first physical primary particle in the decay chain (upwards)
/// \param particle The particle to start from
Expand Down Expand Up @@ -728,8 +725,10 @@
const auto& daughter2 = daughtersMother.iteratorAt(1);
if (daughter1.pdgCode() == PDG_t::kGamma && daughter2.pdgCode() == PDG_t::kGamma) {
// get the full stack of particles that these daughters create
auto fullDecayChain1 = getDaughtersInChain(daughter1);
auto fullDecayChain2 = getDaughtersInChain(daughter2);
std::vector<int> fullDecayChain1;
std::vector<int> fullDecayChain2;
getDaughtersInChain(daughter1, fullDecayChain1);
getDaughtersInChain(daughter2, fullDecayChain2);
bool photon1Found = false;
bool photon2Found = false;

Expand Down
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