Absence ofμ−eConversion Processes and theΔI=12Rule

The lepton and strongly interacting particle currents in the universal Fermi interaction are both assumed to be split into two parts, even and odd, with respect to an internal symmetry operation. The requirement that the over-all interaction be even allows $2\mu \to 2e$ processes while forbidding single $\mu \to e$ conversion and requires that the nonleptonic decays come about through the coupling of the strangeness-changing current with itself. This leads us to a theory which differs from the schizon scheme by allowing $\Delta S=2\mathrm{}$ leptonic processes, and differs from the veton scheme by associating electrons with muon neutrinos in strangeness-changing processes.