文章基本信息

标题：NPR of K\to\pi\pi operators with a step scaling matrix
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作者：N. Garron ; P.A. Boyle ; A. Lytle 等
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 compute the renormalization factors of four-quark operators needed for the study of K !pp decay in the DI = 3=2 channel. We evaluate the Z-factors at a low energy scale (m0 = 1:145 GeV) using four different non-exceptional RI-SMOM schemes on a large, coarse lattice (a 0:14 fm) on which the bare matrix elements are also computed. Then we compute the universal, nonperturbative, scale evolution matrix of these renormalization factors between m0 and 3 GeV. We give the numerical results for the different steps of the computation in two different nonexceptional lattice schemes, and our final results are converted in MS at 3 GeV using one-loop perturbation theory.