TruthCollectionMakerMuon.cxx

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/

// TruthCollectionMakerMuon.cxx
// Create truth muon collection decorated with muon decay specific variables
 
// Class header file
#include "DerivationFrameworkMCTruth/TruthCollectionMakerMuon.h"
#include "TruthUtils/HepMCHelpers.h"
 
std::vector<int> DerivationFramework::TruthCollectionMakerMuon::updateMask(const xAOD::TruthParticleContainer* truthParticles) const {
  std::vector<int> entries;
  entries.reserve(truthParticles->size());
  for (const auto* truthParticle : *truthParticles) {
    entries.push_back( ((std::abs(truthParticle->pdgId()) == MC::MUON) && truthParticle->isGenStable()) ? 1 : 0);
  }
  return entries;
}