$\xi (2230)$ is likely to be a glueball

Abstract

On the basis of the recent results of $\xi (2230)\to {\pi }^{+}{\pi }^{-},p\bar{p}$ and $\xi (2230)\to K^{+}{K}^{-},K_S{K}_S$, measured by the BES Collaboration in $J/\psi$ radiative decays, combined with the PS185 experiment of $p\bar{p}\to \xi (2230)\to K\bar{K}$, we argue that because of its very narrow partial decay widths to $\pi \pi$ and $K\bar{K}$ ( less than $1MeV$ ), its large production rate in $J/\psi$ radiative decays, and its flavor- symmetric couplings to $\pi \pi$ and $K\bar{K}$, the $\xi (2230)$ is very likely to be a $J^{PC}=(even{)}^{++}$ glueball.

Comments: 6 pages in Latex, talk presented at the CCAST Workshop on Tau-Charm Factory, Beijing, November 1994