Searches for $CP$ violation in beauty baryons at LHCb

The understanding ofCP-violating mechanisms in the baryon sectoris of particular importance in light of the observed matter-antimatter asymmetryin the Universe, but few studies have been performed in baryon decays to date.The searches forCPviolation in beauty baryons performed by the LHCb Col-laboration on LHC Run I data are reported, including the first evidence for $CP$ violation in a baryon decay, $\Lambda_b^0\rightarrow p\pi^-\pi^+\pi^-$. Prospects for LHC Run II are also outlined.