Weak radiative hyperon decays in quark model

Abstract

Weak radiative hyperon decays are considered in the framework of a quark model. The phenomenological model includes 1-quark transitions with the effective $sd\gamma$-vertex and 2-quark ones with the W-exchange $s+u\to u+d+\gamma$ and turns out to describe well the data and gives predictions for asymmetry of the decays $\Lambda \to n+\gamma$ and ${\Xi }^{-}\to {\Sigma }^{-}+\gamma$.

12 pages, 5 tables, 5 figures