文章基本信息

标题：The Operator Product Expansion on the lattice
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作者：P.E.L. Rakow ; W. Bietenholz ; N. Cundy 等
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2007
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We investigate the Operator Product Expansion (OPE) on the lattice by directly measuring the product Jm Jn (where J is the vector current) and comparing it with the expectation values of bilinear operators. This will determine the Wilson coefcients in the OPE from lattice data, and so give an alternative to the conventional methods of renormalising lattice structure function calculations. It could also give us access to higher twist quantities such as the longitudinal structure function FL F2 2xF1. We use overlap fermions because of their improved chiral properties, which reduces the number of possible operator mixing coefcients.