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arXiv 0811.2760hep-th
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极大阿贝尔规范下欧氏Yang-Mills理论中Gribov区域的研究

Study of the Gribov region in Euclidean Yang-Mills theories in the maximal Abelian gauge

M. A. L. Capri, A. J. Gomez, V. E. R. Lemes, R. F. Sobreiro, S. P. Sorella

摘要:

研究了极大阿贝尔规范下SU(2)Euclidean Yang-Mills理论中Gribov区域的性质。这个区域在所有非对角方向上都是有界的,而在对角方向上是无界的。BRST不变性的软突破,由于在Gribov区域的路径积分的集成域的限制进行了仔细检查。由于在对角方向上的无界性,相对于阿贝尔变换的不变性被保持,这是极大阿贝尔规范的局部U(1)沃德恒等式的起源。

英文摘要:

The properties of the Gribov region in SU(2) Euclidean Yang-Mills theories in the maximal Abelian gauge are investigated. This region turns out to be bounded in all off-diagonal directions, while it is unbounded along the diagonal one. The soft breaking of the BRST invariance due to the restriction of the domain of integration in the path integral to the Gribov region is scrutinized. Owing to the unboundedness in the diagonal direction, the invariance with respect to Abelian transformations is preserved, a property which is at the origin of the local U(1) Ward identity of the maximal Abelian gauge.

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