Penguin-induced radiative baryonic B decays

Weak radiative baryonic B decays B→B1B̄2γ mediated by the electromagnetic penguin process b→sγ have appreciable rates larger than their two-body counterparts B→B1B̄2. The branching ratios for B−→Λp̄γ and B−→Ξ0Σ̄−γ are sizable, falling into the range of (1∼6)×10−6 with the value preferred to be on the large side, and not far from the bottom baryon radiative decays Λb→Λγ and Ξb→Ξγ due to the large short-distance enhancement for b→sγ penguin transition and the large strong coupling of the anti-triplet bottom baryons with the B meson and the light baryon. These penguin-induced radiative baryonic B decay modes should be accessible by B factories.