$\Gamma($ ${{\mathit \Xi}^{-}}$ $\rightarrow$ ${{\mathit \Sigma}^{0}}{{\mathit \mu}^{-}}{{\overline{\mathit \nu}}_{{\mu}}}$ $)/\Gamma($ ${{\mathit \Xi}^{-}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \pi}^{-}}$ $)$
$\Gamma_{6}/\Gamma_{1}$