Add taus and their downstream particles (immediate and further decay products) in a special collection def addTausAndDownstreamParticles(kernel=None, generations=1): return addParentAndDownstreamParticles(kernel=kernel, generations=generations, parents=[15], prefix='Tau').
Add electrons, photons, and their downstream particles in a special collection def addEgammaAndDownstreamParticles(kernel=None, generations=1): return addParentAndDownstreamParticles(kernel=kernel, generations=generations, parents=[11,22], prefix='Egamma').