SU(3)F analysis for beauty baryon decays

We perform a general SU(3)F analysis of b →c c ¯s (d ) decays of members of the beauty baryon antitriplet to a member of the light baryon octet and a singlet. Under several reasonable assumptions we found |A (Ξ_b⁰→Λ S |/A (Ξ_b⁰→Ξ⁰S)) ≈1 /√{6 }|V_cb^∗V_cd/(V_cb^∗V_cs)| and |A (Λ_b→Σ⁰S |/A (Λ_b→Λ S)) ∼0.02 _. These two relations have been recently probed by LHCb for the case of S = J/ψ. The former agrees with the measurement, while for the latter our prediction lies close to the upper bound set by LHCb.