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Is the Y(2175) a Strangeonium Hybrid Meson?

J. Ho,R. Berg,T. G. Steele, W. Chen, D. Harriett

Physical review D/Physical review D(2019)

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摘要
QCD Gaussian sum rules are used to explore the vector (J(PC) = 1(--)) strangeonium hybrid interpretation of the Y(2175). Using a two-resonance model consisting of the Y(2175) and an additional resonance, we find that the relative resonance strength of the Y(2175) in the Gaussian sum rules is less than 5% that of a heavier 2.9 GeV state. This small relative strength presents a challenge to a dominantly hybrid interpretation of the Y(2175).
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