Interpretation of recently discovered single bottom baryons in the relativistic flux tube model

Following recent experimental progress in the study of bottom baryons, we systematically calculate the mass spectra of ₁, ₁, ₁, ₁^', and ₁ baryons with a quark-diquark picture in the framework of a relativistic flux tube model with spin-dependent interactions in the j-j coupling scheme. Furthermore, we calculate the strong decay width of bottom baryons decaying into a bottom baryon and a light pseudoscalar meson. A good agreement is found between the calculated masses and the experimentally available masses of singly bottom baryons. %We interpret ₁ (6097) as a 1P (3/2^-) state, ₁ (6100) as 1P (1/2^-) state of ₁ baryon, ₁ (6227) as a 1P (1/2^-) or 1P (3/2^-) state of ₁' baryon, ₁ (6327) as a 1P (3/2^-) state of ₁' baryon, and ₁ (6333) as a 1P (3/2^-) state of ₁' baryon. By analysing both mass spectra and strong decay widths, we interpret ₁ (6097) as a 1P (3/2^-) state and ₁ (6100) as a 1P (1/2^-) state of ₁ baryon. The ₁ (6227) is identified to be an orbital excitation 1P of the ₁^' baryon with J^P=3/2^-. Further, we determine ₁ (6327) and ₁ (6333) as a 1P (3/2^-) state and 1P (5/2^-) state, respectively, of ₁^' baryon. From the obtained mass spectra, we construct the Regge trajectories in the (J, M^2) plane, which are found to be essentially linear, parallel, and equidistant. Our predictions for higher orbital and radial excited states can help experimentalists identify missing excited states of singly bottom baryons.