constexpr ParticleHypothesis particle[PARTICLEHYPOTHESES]
the array of masses
void book(Htype *&pHisto, const std::string &histoIdentifier, const std::string &nameOverride="", const std::string &folder="default")
Helper method to book histograms using an identifier string.
Class describing a truth particle in the MC record.
Class describing a TrackParticle.