Test of lepton flavour universality with $B_s^0\to \ddot{I}•{\ell }^{+}{\ell }^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1128

Lepton flavour universality in rare $b\to s$ transitions is tested for the first time using $B_s^0$ meson decays. The measurements are performed using $pp$ collision data c…