Charmoniumlike States at BESIII

TL;DR

This paper reports recent experimental studies of exotic charmonium-like states at BESIII, focusing on new data analyses of various decay channels and the Z_{cs}(3985) state, contributing to understanding their nature.

Contribution

It presents new experimental results on XYZ states and the Z_{cs}(3985), providing insights into their properties and interactions.

Findings

Observation of $X(3872) o\pi^0\chi_{c0}$ decay

Measurements of $e^+e^- o K^+K^-J/\psi$ cross sections

Evidence for the $Z_{cs}(3985)$ state

Abstract

Despite being extensively studied since their initial discovery in 2003, the XYZ states do not yet have a clear interpretation. BESIII recently collected additional data above 4 GeV which can be used to further study these exotic hadron candidates. We present recent studies of $X(3872)\to\pi^0\chi_{c0}$, $e^+e^-\to K^+K^-J/\psi$, $e^+e^-\to$ light hadrons, $e^+e^-\to D^{*+}D^{(*)-}$, and on the $Z_{cs}(3985)$.