Stabilization and Consistency for Subtracted and Unsubtracted QCD Sum Rules for 0^++ Scalar Glueball |
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引用本文: | 张振宇,刘觉平.Stabilization and Consistency for Subtracted and Unsubtracted QCD Sum Rules for 0^++ Scalar Glueball[J].中国物理快报,2006,23(11):2920-2923. |
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作者姓名: | 张振宇 刘觉平 |
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作者单位: | College of Physics and Technology, Wuhan University, Wuhan 430072 |
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基金项目: | Supported by the National Natural Science Foundation of China under Grant No 10075036, the BEPC National Laboratory Project of Research and Development, and the BES Collaboration Research Foundation. |
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摘 要: | Based on a semi-classical expansion for quantum chromodynamics in the instanton liquid background, the correlation function of the 0^++ scalar glueball current is calculated. Besides the pure classical and quantum contributions, the contributions arising from the interactions between the classical instanton fields and quantum gluon ones come into play. It turns out that the latter contributions have a great role not only in making the stabilization of the subtracted and unsubtracted Laplace-transformed QCD sum rules for 0^++ scalar glueball, but also in bring back the consistency between the two related sum rules, or equivalently between the QCD asymptotic expression and low energy theorem. The result for the scalar glueball mass is predicted to be mG= 1.35 GeV.
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关 键 词: | 稳定性 一致性 QCD总和法则 标量 量子色动力学 |
收稿时间: | 2006-05-22 |
修稿时间: | 2006-05-22 |
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