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arXiv 0705.2718hep-lathep-phhep-th
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库仑规范Gribov副本与约束势

Coulomb gauge Gribov copies and the confining potential

Tom Heinzl, Kurt Langfeld, Martin Lavelle, David McMullan

摘要:

我们研究了Marinari等人提出的方法,到静态夸克间势的基础上的Polyakov线的有限时间范围内,在库仑规范评估。我们表明,在小的空间分离,潜在的可以被理解为两个单独的规范不变的色荷之间。在较大的分离Gribov副本阻碍非微扰识别个别规范不变的颜色状态。我们证明,第一次,如何规范不变性可以保持相当普遍的平均超过Gribov副本。这使我们能够扩展分析的Polyakov线和相应的,规范不变的夸克-反夸克状态的所有距离标度。利用大尺度格点模拟,我们证明了这种内插态在夸克-反夸克扇区中与基态有很好的重叠,并在所有距离上产生完整的静态夸克间势。还提出了网格上的Gribov副本的视觉表示。

英文摘要:

We study the approach, initiated by Marinari et al., to the static inter-quark potential based on Polyakov lines of finite temporal extent, evaluated in Coulomb gauge. We show that, at small spatial separations, the potential can be understood as being between two separately gauge invariant colour charges. At larger separations Gribov copies obstruct the non-perturbative identification of individually gauge invariant colour states. We demonstrate, for the first time, how gauge invariance can be maintained quite generally by averaging over Gribov copies. This allows us to extend the analysis of the Polyakov lines and the corresponding, gauge invariant quark-antiquark state to all distance scales. Using large scale lattice simulations, we show that this interpolating state possesses a good overlap with the ground state in the quark-antiquark sector and yields the full static inter-quark potential at all distances. A visual representation of the Gribov copies on the lattice is also presented.

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