Properties of $Ω_{ccb}$ and $Ω_{bbc}$ baryons in a quark-diquark model
In this work, we investigate the mass spectra and radiative transitions of $Ω_{ccb}$ and $Ω_{bbc}$ baryons within a relativistic screened potential model using the quark-diquark approximation to capture key aspects of their internal structure. The model describes the $S$-, $P$-, and $D$-wave excitations, provides corresponding mass predictions, and offers a comparison with other theoretical approaches. Our findings suggest that excitations involving the diquark occur at lower energies than those requiring relative motion between the quark and diquark, challenging conventional assumptions about the rigidity of heavy diquark systems. Analysis of radiative decays of these states, shows that spin-flip transitions within the same orbital multiplet are suppressed, while transitions involving orbital or radial changes dominate with significantly larger widths. The model offers subtle distinctions in excitation dynamics and highlights its value for future studies and for interpreting potentially upcoming experimental results on triply heavy baryons.