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arXiv 1111.5457hep-thhep-lathep-ph
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关于剩余规范轨道的结构

On the structure of the residual gauge orbit

Axel Maas

摘要:

规范固定的关联函数是一个有价值的工具,在中间步骤时,确定规范不变的物理。然而,当在不同的计算中获得它们时,必须使用完全相同的量规定义以确保可比性。除了微扰理论,这是复杂的Gribov-Singer模糊性。原则上,格点规范理论可以操纵单个Gribov副本,因此使其成为处理二义性的极好方法。然而,与连续介质方法相比,这需要在晶格之外重复相同的处理,通常在路径积分公式中。在这里,规范轨道的性质将被调查关于这个问题。特别是,在非微扰广义的朗道规范采用平均Gribov副本的可能性进行了讨论。

英文摘要:

Gauge-fixed correlation functions are a valuable tool in intermediate steps when determining gauge-invariant physics. However, when obtaining them in different calculations, it is necessary to use exactly the same definition of the gauge to ensure comparability. Beyond perturbation theory, this is complicated by the Gribov-Singer ambiguity. In principle, lattice gauge theory can manipulate individual Gribov copies, thus making it an excellent method to deal with the ambiguity. However, to compare to continuum methods this requires to replicate the same treatment outside the lattice, usually in a path integral formulation. Here, the properties of the gauge orbit will be investigated with respect to this question. Especially, the possibility of employing averages over Gribov copies in non-perturbative generalizations of the Landau gauge will be discussed.

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