Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-08-20
Commun.Theor.Phys.42:844,2004
Physics
High Energy Physics
High Energy Physics - Phenomenology
Scientific paper
We comment on the quantum numbers and decay channels of the possible proton antiproton bound state observed by BES Collaboration. Based on the general symmetry consideration and available experimental information, we conclude that the quantum number of this state is very likely to be $J^{PC}=0^{-+}, I^G=0^+$, which can not decay into final states $\pi^+\pi^-, 2\pi^0, K{\bar K}, 3\pi$. Besides its dissociation into $p\bar p$, the other important mesonic decay modes could be $\eta \pi\pi$, $\eta'\pi\pi$, $\eta\eta\eta$, $4\pi$, $K{\bar K}\pi$, $\eta K{\bar K}$, $K\bar K \pi\pi$, 6$\pi$. Experimental search of this signal in these meson final states is strongly called for.
Gao Chong-Shou
Zhu Shi-Lin
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