Phenomenological Analysis ofμDecay

Abstract

The spectrum, asymmetry, and helicity of the electrons from $\mu$ decay are calculated from the most general form of the two-component neutrino theory with lepton conservation. In addition to the non-local interactions considered recently by Lee and Yang, terms appearing phenomenologically as derivative couplings may occur. In particular, a spectrum that is, aside from a statistical factor, linear in momentum is possible with $\rho \ne \frac{3}{4}$. This could be interpreted as evidence that fermions of baryonic mass are responsible for the nonlocality.