Pion decay: branching fractions for rare decay channel

[acelenta (Andrea Celentano)]

Dear colleagues,
is the decay channel \pi^+ \rightarrow e^+ \nu_e implemented in FLUKA? More generally, is there a way to identify, for a given unstable particle, what are the decay channels that are implemented, and the corresponding branching fractions?

Thanks,
Bests,
Andrea

[ceruttif (Francesco Cerutti)]

@acelenta

is the decay channel \pi^+ \rightarrow e^+ \nu_e implemented in FLUKA?

yes, with branching fraction 1.230E-4.

The info is coded in a core routine, which includes branching fractions down to 1.55E-5 for the same decay channel of charged kaons.