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arXiv 1209.0408hep-ph
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各种重口味的夸克凝聚体

Quark condensate for various heavy flavors

Dmitri Antonov, Jose Emilio F. T. Ribeiro

摘要:

在世界线有效作用量理论中,对威尔逊圈采用随机真空模型提供的一个近似,计算了夸克凝聚。从重夸克极限下夸克和胶子凝聚之间的关系出发,我们将当前夸克质量减小到真空相关长度的倒数,发现这样夸克凝聚的绝对值减少了64%。特别是,我们发现传统的重夸克凝聚公式不能应用于c夸克,即使在b夸克的情况下,这个公式的修正可以达到23%。我们还证明了,对于胶子场强度的两点关联函数的指数参数化,夸克凝聚不依赖于随机背景Yang-Mills场的非约束非微扰相互作用.

英文摘要:

The quark condensate is calculated within the world-line effective-action formalism, by using for the Wilson loop an ansatz provided by the stochastic vacuum model. Starting with the relation between the quark and the gluon condensates in the heavy-quark limit, we diminish the current quark mass down to the value of the inverse vacuum correlation length, finding in this way a 64%-decrease in the absolute value of the quark condensate. In particular, we find that the conventional formula for the heavy-quark condensate cannot be applied to the c-quark, and that the corrections to this formula can reach 23% even in the case of the b-quark. We also demonstrate that, for an exponential parametrization of the two-point correlation function of gluonic field strengths, the quark condensate does not depend on the non-confining non-perturbative interactions of the stochastic background Yang-Mills fields.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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