Known decays of Xi-

(Only the first generation of decays, no cascades)

Final state Branching
$\Xi^{-}_{}$ $\to$ $\Lambda^{0}_{}$ $\pi^{-}_{}$ 9.9e-1
$\Xi^{-}_{}$ $\to$ $\Sigma^{-}_{}$ $\gamma^{}_{}$ 1.2e-4
$\Xi^{-}_{}$ $\to$ $\Lambda^{0}_{}$ $e^{-}_{}$ $\bar{\nu}^{}_{e}$ 5.6e-4
$\Xi^{-}_{}$ $\to$ $\Lambda^{0}_{}$ $\mu^{-}_{}$ $\bar{\nu}^{}_{\mu}$ 3.5e-4
$\Xi^{-}_{}$ $\to$ $\Sigma^{0}_{}$ $e^{-}_{}$ $\bar{\nu}^{}_{e}$ 8.7e-5