Speaker
Description
The BESIII experiment, operating in the τ-charm energy region, has conducted extensive studies of exotic hadronic states using the world’s largest data samples of electron-positron collisions at center-of-mass energies from 4.0 to 4.95 GeV. These studies systematically probe candidates beyond the conventional quark model, such as multiquark or hybrid configurations, by analyzing a diverse set of final states with high precision. Key results include stringent constraints on the decay properties of the prototypical exotic state X(3872), precise measurements of the cross-sections of electron-positron annihilation into hidden- or open-charm final states, detailed investigations of near-threshold states, and partial wave analyses involving the charged charmonium-like $Z_c$ states. With the upgraded luminosity and energy scan capabilities of BEPCII, these studies are poised to significantly advance our understanding of non-perturbative QCD and the spectrum of exotic matter in the charm sector. An overview of recent results and an outlook on future possibilities will be presented.