X（2175）是否有一个等矢量伴星？
Is there an isovector companion of the X(2175)?
摘要：
In this letter we study the reaction e^{+}e^{-} \to ϕπ^0 ηwith the π^{0}ηsystem in an isoscalar s-wave configuration. We use a formalism recently developed for the study of e^{+}e^{-} \to ϕππand e^{+}e^{-} \to ϕK^{+}K^{-}. The obtained cross section is within the reach of present e^{+}e^{-} machines. Measuring this channel would test the absence of an isovector companion of the X(2175) as predicted by the three body approach to this resonance.
英文摘要：
In this letter we study the reaction e^{+}e^{-}\toϕπ^0 ηwith the π^{0}ηsystem in an isoscalar s-wave configuration. We use a formalism recently developed for the study of e^{+}e^{-}\toϕππand e^{+}e^{-}\toϕK^{+}K^{-}. The obtained cross section is within the reach of present e^{+}e^{-} machines. Measuring this channel would test the absence of an isovector companion of the X(2175) as predicted by the three body approach to this resonance.
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