Understanding the antideuteron production from $\overline{\Lambda_{b}}$ decays

Antinuclei detection by space-borne experiments close to Earth has been identified as a smoking gun for dark matter signals. Recently, theoretical efforts were attempted to introduce new channels for antinuclei production from $\overline{\Lambda_b}$ decays. This decay channel was never observed and requires experimental evidence, to which the Large Hadron Collider offers the ideal environment. We present a prediction of the $\overline{\Lambda_b}\longrightarrow \overline{\rm{d}} + \rm{X}$ branching ratio ($\overline{\Lambda_b}$ to antideuterons). Proton-proton collisions at $\sqrt{s} = 13.6\; \rm{TeV}$ are simulated using PYTHIA, from which the production of $\overline{\Lambda_b}$ is obtained. State-of-the-art coalescence models are then applied to the antinucleons available in the final state to produce antideuterons. A first estimate of the branching ratio of the process is obtained, evaluating the feasibility of measuring this new channel at the LHC.