particle

Use when looking up particle properties (mass, charge, width, PDG ID, lifetime, spin, parity) from the PDG tables in Python: converting between particle names and PDG IDs, filtering decay modes, checking if a particle is stable, querying quantum numbers (J, P, C, G, I), working with MC generator output where particle codes need to be identified or converted (Geant3, Pythia, Corsika7, EvtGen), or using particle/PDGID literals in analysis code.