add muon decay
wait for pythia #54 (closed) or reimplement routine from corsika ? is important at low energies where energy loss and scattering play a role, i.e. related with #103 (closed) and #104 (closed)
IAP GITLAB
wait for pythia #54 (closed) or reimplement routine from corsika ? is important at low energies where energy loss and scattering play a role, i.e. related with #103 (closed) and #104 (closed)