Known decays of B_1(L)-

(Only the first generation of decays, no cascades)

Final state Branching
$B^{-}_{1}L$ $\to$ $\bar{B}'^{0}_{}$ $\pi^{-}_{}$ 6.6e-1
$B^{-}_{1}L$ $\to$ $B'^{-}_{}$ $\pi^{0}_{}$ 3.3e-1