Observation of the decay ${\Lambda }_b^0\to p{K}^{-}{\mu }^{+}{\mu }^{-}$ and a search for $CP$ violation

LHCb collaboration, R. Aaij, B. Adeva +763

A search for $CP$ violation in the decay ${\Lambda }_b^0\to p{K}^{-}{\mu }^{+}{\mu }^{-}$ is presented. This decay is mediated by flavour-changing neutral-current transitions in the Standard Model and…