Search for the rare decay $B^{+}\to {\mu }^{+}{\mu }^{-}{\mu }^{+}{\nu }_{\mu }$

LHCb collaboration, R. Aaij, C. Abellán Beteta +844

A search for the rare leptonic decay $B^{+}\to {\mu }^{+}{\mu }^{-}{\mu }^{+}{\nu }_{\mu }$ is performed using proton-proton collision data corresponding to an integrated luminosity of $4.7$ fb$…