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Gasser-Leutwyler Coefficients of Chiral Lagrangian for Pseudoscalar Goldstone Bosons
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  • 分类：O41[理学—理论物理;理学—物理]
  • 作者机构：[1]Collaboration Group of Hadron Physics and Non-perturbative QCD Study, Guangxi University of Technology, Liuzhou 545006, China, [2]Department of Physics, Qingdao University, Qingdao 266071, China, [3]Department of Physics, Hechi College, Yizhou 546300, China, [4]Institute of High Energy Physics, the Chinese Academy of Sciences, Beijing 100049, China, [5]Institute of Modern Physics, the Chinese Academy of Sciences, Lanzhou 730000, China
  • 相关基金：The project supported in part by National Natural Science Foundation of China under Grant Nos. 10565001, 10435080, and 10575123 and the Natural Science Foundation of Guangxi Province of China under Grant Nos. 0542042, 0575020, and 0481030
  • 相关项目：五夸克奇特重子态
关键词： 手性扰动理论, Gasser-Leutwyler系数, 夸克传播, DYSON-SCHWINGER方程, chiral perturbation theory, Gasser-Leutwyler coefficient, quark propagator, Dyson-Schwinger equations
中文摘要：

与一个有效 gluon 增殖者为夸克增殖者在彩虹近似基于 Dyson-Schwinger 方程，并且充分在 parametrized 上处理了增殖者由我们建议了的夸克， chiral Lagrangian forpseudoscalar Goldstone 波色子的未知 Gasser-Leutwyler 系数， L_i，分别地被预言。以二个不同方法的 L_i 的预言的价值互相而且与在文学广泛地使用的实验价值和许多另外的理论模型与 QCD 特征预言的价值一致在合理同意不仅。接着， ourparameterized 夸克增殖者预言的 Gasser-Leutwyler 系数的兼容结果清楚地验证它的广泛的有效性。

英文摘要：

Based on the Dyson-Schwinger equations in raAnbow approximation for quark propagator with an effective gluon propagator, and on the parametrized fully dressed quark propagator proposed by us, the unknown GasserLeutwyler coeiticients of the chiral Lagrangian for pseudoscalar Goldstone bosons, Li, are predicted respectively. The predicted values of Li in the two different ways are not only in reasonable agreement each other but also in agreement with empirical values used widely in literature and the values predicted by many other theoretical models with QCD characteristics. The compatible results of Gasser-Leutwyler coefficients predicted by our parameterized quark propagator, in turn, clearly verify its extensive validity.

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