Study of Charmonium(-like) Spectroscopy and Decay at BESIII

Abstract

The recent results on Charmonium and Charmonium-like states at BESIII are reviewed, including the observation of ${\mathrm{Z}}_{\mathrm{cs}}(3985)$ state, the study of the new decay modes of ${\psi }_2(3823)$ state, observation of resonance structure in ${\mathrm{e}}^{+}{\mathrm{e}}^{-}\to {\pi }^{+}{\pi }^{-}{\psi }_2(3823)$ process, the study of the ${\mathrm{e}}^{+}{\mathrm{e}}^{-}\to {\mathrm{K}}^{+}{\mathrm{K}}^{-}J/\psi$ process, cross section measurement of ${\mathrm{e}}^{+}{\mathrm{e}}^{-}\to \omega {\pi }^0$ and $\omega \eta$ process, branching fraction measurement of $\psi (3686)\to {\bar{\Sigma }}^0\Lambda +c.c.$ process. Decay channels for ${\chi }_{cJ}\to \Lambda \bar{\Lambda }$, ${\chi }_{cJ}\to \Lambda \bar{\Lambda }\eta$, $\psi (3686)\to \Lambda \bar{\Lambda }\omega$ and ${\eta }_c(2S)\to 3({\pi }^{+}{\pi }^{-})$ are also discussed. The property of the spin singlet P wave Charmonium state, ${\mathrm{h}}_{\mathrm{c}}$ is also reported.