Analysis of Y(4660) and Related Bound States with QCD Sum Rules |
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Authors: | WANG Zhi-Gang and ZHANG Xiao-Hong |
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Affiliation: | Department of Physics, North China Electric Power University, Baoding 071003, China |
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Abstract: | In this article, we take the vector charmonium-like state Y(4660) as a ψ'f0(980) bound state (irrespective of the hadro-charmonium and the molecular state) tentatively, and study its mass using the QCD sum rules. The numerical value MY=4.71 ± 0.26 GeV is consistent with the experimental data. Considering the SU(3) symmetry of the light flavor quarks and the heavy quark symmetry, we also study the bound states ψ' σ (400-1200), Υ''f0(980), and Υ'' σ(400-1200) with the QCD sum rules, and make reasonable predictions for their masses. |
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Keywords: | ψ' f0(980) bound state QCD sum rules |
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