Resonances and $CP$ violation in $B_s^0$ and ${\overline{B}}_s^0\to J/\psi K^{+}{K}^{-}$ decays in the mass region above the $\varphi (1020)$

LHCb collaboration, R. Aaij, B. Adeva +770

The decays of $B_s^0$ and ${\overline{B}}_s^0$ mesons into the $J/\psi K^{+}{K}^{-}$ final state are studied in the $K^{+}{K}^{-}$ mass region above the $\varphi (1020)$ meson in order to determine the res…