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arXiv 1905.08296hep-th
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背景平均有效action的规范不变性

Gauge invariance of the background average effective action

Peter M. Lavrov, Eduardo Antonio dos Reis, Tibério de Paula Netto, Ilya L. Shapiro

摘要:

在一般的规范理论下,利用泛函重整化群方法的背景场方法,研究了背景平均有效作用量依赖于外场时的背景场对称性和规范依赖性.最后的结果是,平均有效作用的对称性可以保持广泛的一类调节器功能,但在所有情况下的依赖性的规范固定仍然在壳。杨-米尔斯理论被认为是主要的特例。

英文摘要:

Using the background field method for the functional renormalization group approach in the case of a generic gauge theory, we study the background field symmetry and gauge dependence of the background average effective action, when the regulator action depends on external fields. The final result is that the symmetry of the average effective action can be maintained for a wide class of regulator functions, but in all cases the dependence of the gauge fixing remains on-shell. The Yang-Mills theory is considered as the main particular example.

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