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 \rm Z_{cs}(3985) state, the study of the new decay modes of \psi_2(3823)ψ2(3823) state, observation of resonance structure in \rm e^+e^- \to \pi^+\pi^-\psi_2(3823) process, the study of the \rm e^+e^- \to K^+K^-J/\psi process, cross section measurement of \rm e^+e^- \to \omega\pi^0 and \omega\etaωη process, branching fraction measurement of \psi(3686)\to\bar{\Sigma}^0\Lambda + c.c.ψ(3686)→Σ‾0Λ+c.c. process. Decay channels for \chi_{cJ} \to \Lambda\bar{\Lambda}χcJ→ΛΛ‾, \chi_{cJ} \to \Lambda\bar{\Lambda}\etaχcJ→ΛΛ‾η, \psi(3686) \to \Lambda\bar{\Lambda}\omegaψ(3686)→ΛΛ‾ω and \eta_c(2S)\to3(\pi^+\pi^-)ηc(2S)→3(π+π−) are also discussed. The property of the spin singlet P wave Charmonium state, \rm h_c is also reported.