Search for ${\tau }^{-}\to {\mu }^{-}{\mu }^{+}{\mu }^{-}$ decays at the LHCb experiment with Run 2 data

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1188

A search for the lepton-flavour-violating decay ${\tau }^{-}\to {\mu }^{-}{\mu }^{+}{\mu }^{-}$ is carried out using data collected by the LHCb experiment between 2016 and 2018 in proton-proton collisions at t…