Leptonic Photon and Light Element Abundancies

Abstract

In the framework of a model, in which a single leptonic photon ${\gamma }_l$ has the same coupling to the doublets $\mu {\nu }_{\mu }$ and $\bar{\tau }{\bar{\nu }}_{\tau }$, there is no cosmological bound on the strength of this coupling.

Comments: 3 pages, plain LaTeX