Exotic Charmonium at BESIII

TL;DR

The BESIII experiment has collected extensive data leading to surprising discoveries of exotic charged charmonium-like states that challenge traditional quark models, advancing understanding of strong interactions.

Contribution

This paper reviews recent BESIII findings on exotic charmonium states, highlighting new charged structures that defy conventional quark-antiquark explanations.

Findings

Discovery of charged Zc structures

Evidence for exotic states beyond traditional charmonium

Insights into strong interaction dynamics

Abstract

The BESIII Experiment at the Beijing Electron Positron Collider (BEPCII) collected large data samples for electron-positron collisions with center-of-mass above 4 GeV. The analysis of these samples has resulted in a number of surprising discoveries, such as the discoveries of the electrically charged $\mathrm{Z_c}$ structures, which, if resonant, cannot be accommodated in the traditional charm quark and anti-charm quark picture of charmonium. In this talk, we will review the current status of the analyses of the exotic states, as well as a number of other interesting features in the new BESIII data samples.