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Needed fixes to run with photos #50915

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Needed fixes to run with photos #50915

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757fdee
neded fixes to run with photos
alebihan May 11, 2026
93f76e3
moving to nullptr
alebihan May 11, 2026
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61 changes: 32 additions & 29 deletions GeneratorInterface/Core/src/EmbeddingHepMCFilter.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -84,7 +84,7 @@ bool EmbeddingHepMCFilter::filter(const HepMC::GenEvent *evt) {

if (!isHardProc) {
continue;
} else if (pdg_id == tauonPDGID_) {
} else if (pdg_id == tauonPDGID_ && (*particle)->status() != 746) {
reco::Candidate::LorentzVector p4Vis;
decay_and_sump4Vis((*particle), p4Vis); // recursive access to final states.
p4VisPair_.push_back(p4Vis);
Expand Down Expand Up @@ -119,36 +119,39 @@ bool EmbeddingHepMCFilter::filter(const HepMC::GenEvent *evt) {

void EmbeddingHepMCFilter::decay_and_sump4Vis(HepMC::GenParticle *particle, reco::Candidate::LorentzVector &p4Vis) {
bool decaymode_known = false;
for (HepMC::GenVertex::particle_iterator daughter = particle->end_vertex()->particles_begin(HepMC::children);
daughter != particle->end_vertex()->particles_end(HepMC::children);
++daughter) {
bool neutrino = (std::abs((*daughter)->pdg_id()) == tauon_neutrino_PDGID_) ||
(std::abs((*daughter)->pdg_id()) == muon_neutrino_PDGID_) ||
(std::abs((*daughter)->pdg_id()) == electron_neutrino_PDGID_);

// Determining DecayMode, if particle is tau lepton.
// Asuming, that there are only the two tauons from the Z-boson.
// This is the case for the simulated Z->tautau event constructed by EmbeddingLHEProducer.
if (std::abs(particle->pdg_id()) == tauonPDGID_ && !decaymode_known) {
// use these bools to protect againt taus that aren't the last copy (which "decay" to a tau and a gamma)
bool isGamma = std::abs((*daughter)->pdg_id()) == 22;
bool isTau = std::abs((*daughter)->pdg_id()) == 15;
if (std::abs((*daughter)->pdg_id()) == muonPDGID_) {
DecayChannel_.fill(TauDecayMode::Muon);
decaymode_known = true;
} else if (std::abs((*daughter)->pdg_id()) == electronPDGID_) {
DecayChannel_.fill(TauDecayMode::Electron);
decaymode_known = true;
} else if (!neutrino && !isGamma && !isTau) {
DecayChannel_.fill(TauDecayMode::Hadronic);
decaymode_known = true;

if (particle->end_vertex() != nullptr) {
for (HepMC::GenVertex::particle_iterator daughter = particle->end_vertex()->particles_begin(HepMC::children);
daughter != particle->end_vertex()->particles_end(HepMC::children);
++daughter) {
bool neutrino = (std::abs((*daughter)->pdg_id()) == tauon_neutrino_PDGID_) ||
(std::abs((*daughter)->pdg_id()) == muon_neutrino_PDGID_) ||
(std::abs((*daughter)->pdg_id()) == electron_neutrino_PDGID_);

// Determining DecayMode, if particle is tau lepton.
// Asuming, that there are only the two tauons from the Z-boson.
// This is the case for the simulated Z->tautau event constructed by EmbeddingLHEProducer.
if (std::abs(particle->pdg_id()) == tauonPDGID_ && !decaymode_known) {
// use these bools to protect againt taus that aren't the last copy (which "decay" to a tau and a gamma)
bool isGamma = std::abs((*daughter)->pdg_id()) == 22;
bool isTau = std::abs((*daughter)->pdg_id()) == 15;
if (std::abs((*daughter)->pdg_id()) == muonPDGID_) {
DecayChannel_.fill(TauDecayMode::Muon);
decaymode_known = true;
} else if (std::abs((*daughter)->pdg_id()) == electronPDGID_) {
DecayChannel_.fill(TauDecayMode::Electron);
decaymode_known = true;
} else if (!neutrino && !isGamma && !isTau) {
DecayChannel_.fill(TauDecayMode::Hadronic);
decaymode_known = true;
}
}
// Adding up all visible momentum in recursive way.
if ((*daughter)->status() == 1 && !neutrino)
p4Vis += (reco::Candidate::LorentzVector)(*daughter)->momentum();
else if (!neutrino)
decay_and_sump4Vis((*daughter), p4Vis);
}
// Adding up all visible momentum in recursive way.
if ((*daughter)->status() == 1 && !neutrino)
p4Vis += (reco::Candidate::LorentzVector)(*daughter)->momentum();
else if (!neutrino)
decay_and_sump4Vis((*daughter), p4Vis);
}
}

Expand Down