constexpr ParticleHypothesis particle[PARTICLEHYPOTHESES]
the array of masses
SG::ReadHandleKey< xAOD::TruthParticleContainer > m_key
The key of the truth particle container to print.
virtual StatusCode execute(const EventContext &ctx) const override
Function executing the algorithm.
Class describing a truth particle in the MC record.
virtual StatusCode initialize() override
Function initialising the algorithm.