Lepton Decays of Hyperons

An expression is given for the lepton energy spectrum and asymmetry for the lepton decay modes of hyperons in terms of 6 form factors. A weak interaction having the form of the usual lepton current coupled to an unspecified strong current is assumed, and the momentum transfer dependence of the form factors is neglected. Some applications to the decays $\Lambda \to p+e+\overline{\nu }$ and $\Lambda \to p+\mu +\overline{\nu }$ are given.