Mixed Quark-Gluon Condensate Beyond Chiral Limit

被引：0
|
作者：
Lu Chang-Fang [1 ,2 ]
Lue Xiao-Fu [1 ,3 ,4 ]
机构：
[1] Sichuan Univ, Dept Phys, Chengdu 610064, Peoples R China
[2] Sichuan Agr Univ, Dept Phys, Yaan 625014, Peoples R China
[3] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
[4] CCAST World Lab, Beijing 100080, Peoples R China
来源：
COMMUNICATIONS IN THEORETICAL PHYSICS | 2010年 / 53卷 / 05期
基金：
美国国家科学基金会;
关键词：
quark current mass; mixed quark-gluon condensates; QCD sum rule; Schwinger-Dyson equation; Feynman rules; QCD SUM-RULES; QUANTUM CHROMODYNAMICS; BARYON MASSES; RESONANCE; SPECTRUM; PHYSICS; MODEL;
D O I：
暂无
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Using the Dyson-Schwinger equation and perturbation theory, we calculate the mixed quark-gluon condensates in the chiral limit and in the case of nonzero quark current mass for the light quark u/d and strange quark s. The results show that the mixed quark-gluon condensate will decrease when the quark mass increases. For the quark with zero mass, we obtain m(0)(2)= g <(q) over bar sigma(mu nu) G(mu nu)q >/<(q) over barq > congruent to 0.68 GeV2, which is in good agreement with the QCD sum rules estimate m(0)(2) = (0.8 +/- 0.2) GeV2.
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页码：893 / 897
页数：5
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