We study B meson decays to two charmless baryons in the diquark model, including strong and electroweak penguins as well as the tree operators. It is shown that penguin operators can enhance B → BsB̄ considerably, but affect B̄ → B1B̄2 only slightly, where B(1,2) and Bs are non-strange and strange baryons, respectively. The γ dependence of the decay rates due to tree-penguin interference is illustrated. In principle, some of the B sB̄ modes could dominate over B1B̄2 for γ > 90°, but in general the effect is milder than their mesonic counterparts. This is because the O6 operator can only produce vector but not scalar diquarks, while the opposite is true for O1 and O4. Predictions from the diquark model are compared to those from the sum rule calculation. The decays B̄ → BsB̄ s and inclusive baryonic decays are also discussed.
ASJC Scopus subject areas
- Engineering (miscellaneous)
- Physics and Astronomy (miscellaneous)