Exotic and Charmonium(-like) states at BESIII

TL;DR

BESIII has collected extensive data in the tau-charm region, leading to new insights into charmonium and exotic states through spectroscopy, transitions, and decay studies at various energy levels.

Contribution

This paper presents the latest experimental results on charmonium and exotic states from BESIII, highlighting new measurements and discoveries in the field.

Findings

New measurements of charmonium state transitions

Observation of exotic XYZ states production and decay

Enhanced understanding of charmonium spectroscopy

Abstract

The BESIII experiment at the Beijing Electron Positron Collider (BEPCII) has accumulated the world's largest samples of direct $e^+e^-$ collisions in the $\tau$-charm region. From the collected samples, which include $e^+e^-$ annihilations at $J/\psi$, $\psi'$, $\psi$(3770) peaks and in the region from 3.8$\,$GeV to 4.6$\,$GeV, BESIII has produced many new physics results in the spectroscopy, transitions, and decays of charmonium(-like) states. This talk will cover the latest results over a wide range of topics from radiative and hadronic transitions among charmonium states, as well as the productions and decays of the $XYZ$ states.