Analyzing $b\to u$ transitions in semileptonic ${\bar{B}}_s\to K^{\ast +}(\to K\pi ){\ell }^{-}{\bar{\nu }}_{\ell }$ decays

Thorsten Feldmann, Bastian Müller, Danny van Dyk

We study the semileptonic decay ${\bar{B}}_s\to K^{\ast +}{\ell }^{-}{\bar{\nu }}_{\ell }$, which is induced by $b\to u{\ell }^{-}{\bar{\nu }}_{\ell }$ transitions at the quark level. We take into account the sta…