Baryonic $B$ meson decays

Abstract

We review the two and three-body baryonic $B$ decays with the dibaryon ($\mathbf{B}{\bar{\mathbf{B}}}^{\prime }$) as the final states. Accordingly, we summarize the experimental data of the branching fractions, angular asymmetries, and $CP$ asymmetries. Using the $W$-boson annihilation (exchange) mechanism, the branching fractions of $B\to \mathbf{B}{\bar{\mathbf{B}}}^{\prime }$ 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 $CP$ asymmetries of $B\to \mathbf{B}{\bar{\mathbf{B}}}^{\prime }M$, which are promising to be measured by the LHCb and Belle~II experiments. Finally, we remark the theoretical challenges in interpreting $\mathcal{B}(B^{-}\to p\bar{p}{\rho }^{-})$ and $\mathcal{B}(B^{-}\to p\bar{p}{\mu }^{-}{\bar{\nu }}_{\mu })$.

Comments: 15 pages, 3 tables, 2 figures, published version for the special issue "Heavy Flavor Physics and CP Violation" of Advances in High Energy Physics