Mass spectra and radiative transitions of doubly heavy baryons in a relativized quark model

This is the authors' abstract. We don't add key points for this paper.

We study the mass spectra and radiative decays of doubly heavy baryons within the diquark picture in a relativized quark model. The mass of the JP=1/2⁺ Ξcc ground state is predicted to be 3606 MeV, which is consistent with the mass of Ξcc⁺⁺(3621) newly observed by the LHCb Collaboration. The predicted mass gap between two S-wave states, Ξcc* (JP=3/2⁺) and Ξcc (JP=1/2⁺), is 69 MeV. Furthermore, the radiative transitions of doubly heavy baryons are also estimated by using the realistic wave functions obtained from relativized quark model. The radiative decay widths of Ξcc*++→Ξcc⁺⁺γ and Ξcc*+→Ξcc⁺γ are predicted to be about 7 and 4 keV, respectively. These predictions of doubly heavy baryons can provide helpful information for future experimental searches.