  Following recent experimental progress in the study of bottom baryons, we
systematically calculate the mass spectra of $\Lambda_{b}$, $\Xi_{b}$,
$\Sigma_{b}$, $\Xi_{b}^{'}$, and $\Omega_{b}$ 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
$\Sigma_{b}(6097)$ as a $1P(3/2^{-})$ state, $\Xi_{b}(6100)$ as $1P(1/2^{-})$
state of $\Xi_{b}$ baryon, $\Xi_{b}(6227)$ as a $1P(1/2^{-})$ or $1P(3/2^{-})$
state of $\Xi_{b}'$ baryon, $\Xi_{b}(6327)$ as a $1P(3/2^{-})$ state of
$\Xi_{b}'$ baryon, and $\Xi_{b}(6333)$ as a $1P(3/2^{-})$ state of $\Xi_{b}'$
baryon. By analysing both mass spectra and strong decay widths, we interpret
$\Sigma_{b}(6097)$ as a $1P(3/2^{-})$ state and $\Xi_{b}(6100)$ as a
$1P(1/2^{-})$ state of $\Xi_{b}$ baryon. The $\Xi_{b}(6227)$ is identified to
be an orbital excitation $1P$ of the $\Xi_{b}^{'}$ baryon with $J^{P}=3/2^{-}$.
Further, we determine $\Xi_{b}(6327)$ and $\Xi_{b}(6333)$ as a $1P(3/2^{-})$
state and $1P(5/2^{-})$ state, respectively, of $\Xi_{b}^{'}$ 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.
