XYZ radiative transitions at BESIII

TL;DR

This paper reviews recent experimental results from BESIII on radiative transitions among XYZ mesons, which are exotic charmonium-like states that challenge traditional quark models.

Contribution

It provides the first comprehensive summary of BESIII's measurements of radiative transitions involving XYZ states, enhancing understanding of their properties.

Findings

Observation of radiative transitions among XYZ states

Identification of new radiative decay modes

Insights into the structure of exotic charmonium-like states

Abstract

Many unexpected charmonium-like states have recently been observed above the $D\overline{D}$ threshold, which features can't be explained by the conventional quark models. These states are known as XYZ mesons. The study of the radiative transition among these states can provide the important features of XYZ states. This study has recently been performed by the BESIII using the large data samples collected at different center-of-mass energies above 3.8 GeV. This report summarizes the recent results of XYZ radiative transitions at BESIII.