Search for rare $B_{(s)}^0\to {\mu }^{+}{\mu }^{-}{\mu }^{+}{\mu }^{-}$ decays

LHCb collaboration, R. Aaij, C. Abellan Beteta +620

\noindent A search for the decays $B_s^0\to {\mu }^{+}{\mu }^{-}{\mu }^{+}{\mu }^{-}$ and $B^0\to {\mu }^{+}{\mu }^{-}{\mu }^{+}{\mu }^{-}$ is performed using data, corresponding to an integrated luminosity of 1…