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arXiv 0812.2761hep-lat
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SU中的红外行为和Gribov模糊性(2)格点规范理论

Infrared behavior and Gribov ambiguity in SU(2) lattice gauge theory

V. G. Bornyakov, V. K. Mitrjushkin, M. Müller--Preussker

摘要:

对于SU(2)格点规范理论,我们数值研究了朗道规范鬼和胶子传播子的红外行为,特别强调了Gribov拷贝的依赖性。应用一个非常有效的规范固定程序,并产生多达80个规范副本,我们发现,Gribov复制效果的传播是必不可少的红外。特别是,我们最好的副本敷料功能的幽灵传播接近高原的红外线,而随机的第一个副本,它仍然增长。我们的最佳副本零动量胶子传播子显示出随着晶格尺寸的增加而减少的趋势,这不包括奇异解。我们的结果看起来与所谓的非奇异胶子传播子解耦解相容。然而,我们还不认为Gribov副本问题最终得到解决。

英文摘要:

For SU(2) lattice gauge theory we study numerically the infrared behavior of the Landau gauge ghost and gluon propagators with the special accent on the Gribov copy dependence. Applying a very efficient gauge fixing procedure and generating up to 80 gauge copies we find that the Gribov copy effect for both propagators is essential in the infrared. In particular, our best copy dressing function of the ghost propagator approaches a plateau in the infrared, while for the random first copy it still grows. Our best copy zero-momentum gluon propagator shows a tendency to decrease with growing lattice size which excludes singular solutions. Our results look compatible with the so-called decoupling solution with a non-singular gluon propagator. However, we do not yet consider the Gribov copy problem to be finally resolved.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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