| Quark Virtuality and QCD Vacuum Condensates |
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| 作者姓名： | 周丽娟 马维兴 |
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| 作者单位： | [1]DepartmentofInformationandComputingSciences,GuangxiUniversityofTechnology,Liuzhou545006 [2]InstituteofHighEnergyPhysics,ChineseAcademyofSciences,Beijing100039 |
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| 摘 要： | Based on the Dyson-Schwinger equations (DSEs) in the ‘rainbow‘ approximation, we investigate the quark virtuality in the vacuum state and quantum-chromodynamics (QCD) vacuum condensates. In particular, we calculate the local quark vacuum condensate and quark-gluon mixed condensates, and then the virtuality of quark. The calculated quark virtualities are λu,d^2 0.7 GeV^2 for u, d quarks, and λs^2=1.6 GeV^2 for s quark. Our theoretical predictions are consistent with empirical values used in QCD sum rules, and also fit to lattice QCD predictions.
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| 关 键 词： | Dyson-Schwinger方程 量子色动力学 高能物理学 夸克-胶子混合冷凝 夸克分布函数 |
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