文章基本信息

标题：The strong-coupling limit of minimal lattice Landau gauge
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作者：A. Sternbeck ; L. von Smekal
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2008
卷号：2008
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We study the gluon and ghost propagators of lattice Landau gauge in the strong coupling limit b = 0 in pure SU(2) lattice gauge theory to find evidence of the conformal infrared behavior of these propagators as predicted by a variety of functional continuum methods for asymptotically small momenta q2 L2 QCD. In the strong-coupling limit, this same behavior is obtained for the larger values of a2q2 (in units of the lattice spacing a), where it is otherwise swamped by the gauge field dynamics. Deviations for a2q2 < 1 are well parametrized by a transverse gluon mass µ 1=a. Perhaps unexpectedly, these deviations are thus no finite-volume effect but persist in the infinite-volume limit. They furthermore depend on the definition of gauge fields on the lattice, while the asymptotic conformal behaviour does not.