Observation of the decay $\overline{B_s^0}\to {\chi }_{c2}{K}^{+}{K}^{-}$ in the $\phi$ mass region

LHCb collaboration, R. Aaij, B. Adeva +828

The $\overline{B_s^0}\to {\chi }_{c2}{K}^{+}{K}^{-}$ decay mode is observed and its branching fraction relative to the corresponding ${\chi }_{c1}$ decay mode, in a $\pm 15 \textrm{MeV}/c^…