Search for vector charmonium(-like) states in $e^+e^- \rightarrow \omega\chi_{cJ}$

TL;DR

This study measures cross sections of $e^+e^- ightarrow ext{omega} ext{chi}_cJ$ to search for vector charmonium-like states, providing insights into their nature and contributions in this energy region.

Contribution

First measurement of these cross sections with analysis of contributions from specific charmonium(-like) states in the energy region.

Findings

$ ext{omega} ext{chi}_{c0}$ mainly from $Y(4220)$

$ ext{omega} ext{chi}_{c1}$ mainly from $Y(4660)$

Upper limits set for non-significant states

Abstract

The cross sections of $e^+e^- \rightarrow \omega\chi_{cJ(J=0,1,2)}$ have been measured by BESIII. We try to search for vector charmonium(-like) states $Y(4220)$, $Y(4360)$, $\psi(4415)$ and $Y(4660)$ in the $e^+e^- \rightarrow \omega\chi_{cJ(J=0,1,2)}$ line shapes. The $\omega\chi_{c0}$ mainly comes from $Y(4220)$, $\omega\chi_{c1}$ mainly comes from $Y(4660)$ and $\omega\chi_{c2}$ mainly comes from $\psi(4415)$, maybe partly comes from $Y(4360)$ or $Y(4660)$. For the charmonium(-like) states that are not significant in the $e^+e^- \rightarrow \omega\chi_{cJ(J=0,1,2)}$ line shape, we also give the $90\%$ confidence level upper limits on the electron partial width multiplied by branching fraction. These results are helpful to study the nature of charmonium(-like) states in this energy region.