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arXiv 1202.3432hep-thhep-lathep-phnucl-th
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杨-米尔斯理论中Gribov歧义的解除

Lifting the Gribov ambiguity in Yang-Mills theories

Julien Serreau, Matthieu Tissier

摘要:

我们提出了一个新的单参数家庭的朗道规范杨米尔斯理论,可以制定通过功能积分的方法,因此非常适合于分析计算,但它是免费的Gribov模糊性,并避免了Neuberger零问题的标准Faddeev-Popov建设。由此产生的规范固定理论在四维空间中是微扰重整化的,对于鬼场和规范场的计算,它简化为法捷耶夫-波波夫作用量的大规模扩展。我们研究了这个理论的重整化群流在一个循环,并表明,它没有朗道极点在红外线的一些-包括物理相关-重整化参数的值范围。

英文摘要:

We propose a new one-parameter family of Landau gauges for Yang-Mills theories which can be formulated by means of functional integral methods and are thus well suited for analytic calculations, but which are free of Gribov ambiguities and avoid the Neuberger zero problem of the standard Faddeev-Popov construction. The resulting gauge-fixed theory is perturbatively renormalizable in four dimensions and, for what concerns the calculation of ghost and gauge field correlators, it reduces to a massive extension of the Faddeev-Popov action. We study the renormalization group flow of this theory at one-loop and show that it has no Landau pole in the infrared for some - including physically relevant - range of values of the renormalized parameters.

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