Observation of vector charmoniumlike states and search for $Z_{cs}$ in $e^{+}{e}^{-}\to K^{+}{K}^{-}J/\psi$ at BESIII

Abstract

We present the recent measurements of the $e^{+}{e}^{-}\to K^{+}{K}^{-}J/\psi$ process carried out by the BESIII experiment. A new decay mode $Y(4230)\to K^{+}{K}^{-}J/\psi$ is firstly identified by BESIII. Furthermore, two vector charmoniumlike states, $Y(4500)$ and $Y(4710)$, are reported for the first time in the energy-dependent line shape of $e^{+}{e}^{-}\to K^{+}{K}^{-}J/\psi$ cross section. In additon, an investigation of the $K^{\pm }J/\psi$ system is conducted to explore charged charmoniumlike states.

arXiv comment4 pages, 3 figures, contribution to the 2024 QCD session of the 58th Rencontres de Moriond