Study of the rare $B_s^0$ and $B^0$ decays into the ${\pi }^{+}{\pi }^{-}{\mu }^{+}{\mu }^{-}$ final state

LHCb collaboration, R. Aaij, B. Adeva +699

A search for the rare decays $B_s^0\to {\pi }^{+}{\pi }^{-}{\mu }^{+}{\mu }^{-}$ and $B^0\to {\pi }^{+}{\pi }^{-}{\mu }^{+}{\mu }^{-}$ is performed in a data set corresponding to an integrated luminosity of 3.0 fb${}^{-1}$ collected by…