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  • 标题:NPR of K\to\pi\pi operators with a step scaling matrix
  • 本地全文:下载
  • 作者:N. Garron ; P.A. Boyle ; A. Lytle
  • 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.
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