Excited $$\varOmega _b$$ Ωb baryons and fine structure of strong interaction

Abstract The heavy baryon system bounded by the strong interaction has a rich internal structure, so its mass spectra can have the fine structure similar to the line spectra of atom bounded by the electromagnetic interaction. We systematically study the internal structure of P-wave $$\varOmega _b$$ Ωb baryons and calculate their D-wave decay properties. The present study, together with our previous studies on their mass spectra and S-wave decay properties, suggest that all the four excited $$\varOmega _b$$ Ωb baryons recently discovered by LHCb can be well explained as P-wave $$\varOmega _b$$ Ωb baryons, and their beautiful fine structure is directly related to the rich internal structure of P-wave $$\varOmega _b$$ Ωb baryons.