Baryonic $B$ meson decays

TL;DR

This paper reviews baryonic B meson decays, summarizing experimental data and theoretical models, and discusses the potential for future measurements of CP asymmetries at LHCb and Belle II.

Contribution

It provides a comprehensive review of baryonic B decays, including experimental results and theoretical interpretations using W-boson mechanisms and perturbative QCD.

Findings

Branching fractions are interpretable via W-boson annihilation mechanisms.

CP asymmetries in certain decays are promising for measurement at LHCb and Belle II.

Theoretical challenges remain in interpreting specific decay modes.

Abstract

We review the two and three-body baryonic $B$ decays with the dibaryon (${\bf B\bar B'}$) 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 $B\to {\bf B \bf \bar B'}$ 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 $B\to {\bf B\bar B'}M$, which are promising to be measured by the LHCb and Belle~II experiments. Finally, we remark the theoretical challenges in interpreting ${\cal B}(B^-\to p\bar p\rho^-)$ and ${\cal B}(B^-\to p\bar p\mu^-\bar \nu_\mu)$.