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

Understand

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 $J^P=1/2^+$ $\Xi_{cc}$ ground state is predicted to be 3606 MeV, which is consistent with the mass of $\Xi_{cc}^{++}(3621)$ newly observed by the LHCb collaboration.
• The predicted mass gap between two $S$ wave states, $\Xi_{cc}^*$ ($J^P=3/2^+$) and $\Xi_{cc}$ ($J^P=1/2^+$), 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.