Baryonic B Meson Decays

Abstract

We review the two- and three-body baryonic $B$ decays with the dibaryon ( $\mathbf{B}\overline{\mathbf{B}\prime }$ ) as the final states. Accordingly, we summarize the experimental data of the branching fractions, angular asymmetries, and $\text{CP}$ asymmetries. Using the $W$ -boson annihilation (exchange) mechanism, the branching fractions of $B⟶\mathbf{B}\overline{\mathbf{B}\prime }$ are shown to be interpretable. In the approach of perturbative QCD counting rules, we study the three-body decay channels. In particular, we review the $\text{CP}$ asymmetries of $B⟶\mathbf{B}\overline{\mathbf{B}\prime }M$ , which are promising to be measured by the LHCb and Belle II experiments. Finally, we remark the theoretical challenges in interpreting $\mathcal{B}\left(B^{-}⟶p\overline{p}{\rho }^{-}\right)$ and $\mathcal{B}\left(B^{-}⟶p\overline{p}{\mu }^{-}{\overline{\nu }}_{\mu }\right)$ .