Exotic hadrons from BESIII

¹ Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China
² University of Chinese Academy of Sciences, Beijing, China

^* e-mail: yuancz@ihep.ac.cn

Published online: 13 March 2019

Abstract

We report the progress in the study of the exotic hadrons, also called XYZ states, at BESIII experiment with its unique data samples in e⁺ e⁻ annihilation at center-of-mass energies of 3.8–4.6 GeV. The talk covers the observation of the Z_c(3900) and Z_c(4020) and new measurements related to them; updated measurement of the resonant parameters of the Y(4260) in e⁺ e⁻→ π⁺π⁻ J/ψ and discovery of its new decay modes π⁺π⁻ψ(2S), ωχc0, π⁺π⁻h_c, and D⁰D^∗−π⁺+c.c.; and observation of X(3872) in e⁺e⁻ annihilation.