Known decays of Sigma-

(Only the first generation of decays, no cascades)

Final state Branching
$\Sigma^{-}_{}$ $\to$ $n^{0}_{}$ $\pi^{-}_{}$ 9.9e-1
$\Sigma^{-}_{}$ $\to$ $n^{0}_{}$ $\pi^{-}_{}$ $\gamma^{}_{}$ 4.6e-4
$\Sigma^{-}_{}$ $\to$ $n^{0}_{}$ $e^{-}_{}$ $\bar{\nu}^{}_{e}$ 1.0e-3
$\Sigma^{-}_{}$ $\to$ $n^{0}_{}$ $\mu^{-}_{}$ $\bar{\nu}^{}_{\mu}$ 4.5e-4
$\Sigma^{-}_{}$ $\to$ $\Lambda^{0}_{}$ $e^{-}_{}$ $\bar{\nu}^{}_{e}$ 5.7e-5