Strong and radiative decays of the low-lying S - and P -wave singly heavy baryons

The strong and radiative decays of the low-lying S- and P-wave Λc(b), Σc(b), Ξc(b), Ξc(b)′, and Ωc(b) baryons are systematically studied in a constituent quark model. We find that the radiative decay mode Λb0γ could be very useful for us to establish the missing neutral states Σb0 and Σb*0. Our calculation shows that most of those missing λ-mode P-wave singly heavy baryons have a relatively narrow decay width of less than 30 MeV. Their dominant strong and radiative decay channels can be ideal for searching for their signals in future experiments. The Σc(2800) resonance may be assigned to |ΣcP2λ32−⟩ with JP=3/2− or |ΣcP4λ52−⟩ with JP=5/2−. In general, the excitations of |P2λ32−⟩ and |P4λ52−⟩ of the 6F multiplet have similar strong decay properties. In order to identify them, angular distributions of their decays in either strong decay modes or radiative transitions should be needed.