Improved limit on the branching fraction of the rare decay $K_S^0\to {\mu }^{+}{\mu }^{-}$

LHCb collaboration, R. Aaij, B. Adeva +767

A search for the decay $K_S^0\to {\mu }^{+}{\mu }^{-}$ is performed, based on a data sample of proton-proton collisions corresponding to an integrated luminosity of 3 fb$^{-1…