文章基本信息

标题：K ->pi \pi matrix elements from lattice QCD with Wilson fermions
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作者：M. Papinutto
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2001
卷号：2001
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present the status of a lattice calculation for the K ! matrix elements of the S = 1 e ective weak Hamiltonian which are relevant in the determination of 0= and for the I = 1=2 rule, directly with two pion in the nal state. For I = 3=2 matrix elements, we propose a strategy to study the chiral behaviour at next to leading order in ChPT. Some preliminary results for the matrix elements of Q+, Q7 and Q8 are given. Finally, we briefly discuss the I = 1=2 case which, due to the requirement of non-perturbative subtraction, is much more dicult. We show the signal observed for the matrix elements of Q− and Q6.