The $B_{ c}^{ \ast}$ ${ \to}$ $B_{ u,d,s}V$, $B_{ u,d,s}P$ decays are investigated with the QCD factorization approach, where $V$ and $P$ denote the ground $SU(3)$ vector and pseudoscalar mesons, respectively. The $B_{ c}^{ \ast}$ ${ \to}$ $B_{ u,d,s}$ transition form factors are calculated with the Wirbel-Stech-Bauer model. It is found that branching ratios for the color-favored and Cabibbo-favored $B_{ c}^{ \ast}$ ${ \to}$ $B_{ s}{ \rho}$, $B_{ s}{ \pi}$ decays can reach up to ${ \cal O}(10^{ -7})$, which might be measurable in the future LHC experiments.
Categories: hep-ph hep-ex