Test of lepton universality with $B^0\to K^{\ast 0}{\ell }^{+}{\ell }^{-}$ decays

LHCb collaboration, R. Aaij, B. Adeva +785

A test of lepton universality, performed by measuring the ratio of the branching fractions of the $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$ and $B^0\to K^{\ast 0}{e}^{+}{e}^{-}$ deca…