Recent progress on exotic charmonium from BESIII

Abstract

(On behalf of the BESIII collaboration) Deutsches Elektronen-Synchrotron, Hamburge, Gemmany Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China E-mail: guoaq@ihep.ac.cnThe BESIII experiment is an unique electron-position machine operating at τ-charm energy region. It has collected about 5 fb −1 data at centre-mass-energy between 3.8 and 4.6 GeV from 2011 and a series of charged exotic charmomium states, which were named as Z c states, were observed. These observations provide strong evidence that the new type of hadrons beyond meson and baryon exist. Besides, lots of new informations about neutral exotic states, labeled as XY states, were also observed. These observations include the new production mechanism of X(3872) and a candidate of ψ(1 3 D 2 ). Some new structures were also found from the cross section measurement in several exclusive processes. In this proceeding, we report these progresses from BESIII experiment in detail.