文章基本信息

标题：Fermion RG blocking transformations and conformal windows
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作者：T.E Tomboulis ; X. Cheng
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2011
卷号：2011
期号：Lattice2011
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We explore fermion RG blocking transformations in LGT with the aim of studying IR behavior. In the case of light fermions the main concern is ensuring locality of any adopted blocking scheme. We study how an exact fermion blocking transformation may be constructed which is manifestly local in a general gauge field background. We also present an approximate, easily implementable scheme for combined fermion-gauge field blocking, which, as a first modest goal, may allow quick, inexpensive estimates of the location of conformal windows for various groups and fermion representations. We apply such a scheme to SU(2) and SU(3).