Studies of $ξ$ (2230) in $J$ / $ψ$ Radiative Decays

Publisher Website

6 May 1996

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 76 (19) , 3502-3505
https://doi.org/10.1103/physrevlett.76.3502

Abstract

The BES experiment at the Beijing electron-positron collider has observed the

ξ

(2230) signal in

π^{+} π^{-}

,

K^{+} K^{-}

,

K_{S}^{0} K_{S}^{0}

, and

p \bar{p}

final states with

4.6 σ

,

4.1 σ

,

4.0 σ

, and

3.8 σ

statistical significances, respectively. The new observations of two nonstrange decay modes of

ξ \to π^{+} π^{-}

and

p \bar{p}

are important evidence for the glueball interpretation of the

ξ (2230)

.

Keywords

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