文章基本信息

标题：Towards a quantitative understanding of the Delta I=1/2 rule
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作者：P. Hernandez
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2006
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：A new strategy to quantify the role of the charm quark mass in the ΔI = 1/2 rule is summarized. Results for the low-energy couplings of the ΔS = 1 chiral effective Hamiltonian in a theory with a light charm quark (GIM limit) are obtained through a matching of three-point correlation functions computed in Chiral Perturbation Theory and in quenched lattice QCD. We observe a large ΔI = 1/2 enhancement, which is not large enough to explain the experimental result, but suggests significant long-distance contributions to the physical ΔI = 1/2 which are unrelated to penguin contractions or operators.