Observation of tree-level B decays with $s\bar{s}$ Production from Gluon Radiation

The BABAR Collaboration, B. Aubert

We report on our search for $B^{-}\to D_s^{(\ast )+}{K}^{-}{\pi }^{-}$, $\overline{B^0}\to D_s^{(\ast )+}{K}_S^0{\pi }^{-}$, and $B^{-}\to D_s^{(\ast )+}{K}^{-}{K}^{-}$ decays in 383 million $\FourS \to B \Bbar$ events c…