Observation of the decay B ¯ s 0 → χ c 2 K + K − $$ {\overline{B}}_s^0\to {\chi}_{c2}{K}^{+}{K}^{-} $$ in the ϕ mass region

Observation of the decay B ¯ s 0 → χ c 2 K + K − $$ {\overline{B}}_s^0\to {\chi}_{c2}{K}^{+}{K}^{-} $$ in the ϕ mass region