Study of $b$ baryons using D0 Run II data

We present a search for $b$ baryons decaying into $J/\psi$ final states using the full D0 Run II dataset, corresponding to an integrated luminosity of 10.4 fb$^{-1}$ of proton-antiproton collisions. The search includes the channels $\Xi_b^- \to J/\psi\, \Xi^-$ and $\Omega_b \to J/\psi\, \Omega^-$. We extract the lifetimes of these states using the resulting signals, and compare to predictions from theory, and to existing results from CDF.