Studies of $XYZ$ states at BESIII

TL;DR

This paper reports recent experimental results from BESIII on the properties and line-shapes of various $XYZ$ states, advancing understanding of exotic charmoniumlike particles.

Contribution

It presents new measurements of line-shapes and quantum numbers of $XYZ$ states using 12 fb$^{-1}$ of data, providing insights into their nature.

Findings

Line-shape measurements of $e^+e^-\to\pi^0\pi^0\psi(3686)$, $KKJ/\psi$, and $\pi^+D^0D^{*-}$

Determination of $J^P$ of $Z_c(3900)$

Observation of $Z_c(3900)$ in $e^+e^-\to\phi\chi_{c1,2}$ at 4.6 GeV

Abstract

With about 12 fb$^{-1}$ of collected data useful for the study of $XYZ$ states, BESIII collaboration continues the exploration of these exotic charmoniumlike states. Recent results of the measurements of the line-shape of $e^+e^-\to\pi^0\pi^0\psi(3686)$, $KKJ/\psi$, and $\pi^+D^0D^{*-}$, as well as the $J^P$ determination of $Z_c(3900)$ and $Z_c(3900)$ observed in $e^+e^-\to\phi\chi_{c1, 2}$ at $\sqrt{s}=4.6$~GeV will be presented.