K → ππ decays in SU(2) Chiral Perturbation Theory

被引：13

作者：

Bijnens, Johan ^{[1
]}

Celis, Alejandro ^{[1
]}

机构：

[1] Lund Univ, Dept Theoret Phys, SE-22362 Lund, Sweden

来源：

PHYSICS LETTERS B | 2009年 / 680卷 / 05期

基金：

瑞典研究理事会;

关键词：

Kaon decays; Chiral Perturbation Theory; FINAL-STATE INTERACTIONS; AMPLITUDES; THRESHOLD; RULE;

D O I：

10.1016/j.physletb.2009.09.048

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the decays K -> pi pi in one-loop two-flavour Chiral Perturbation Theory. We provide arguments why the calculation of the coefficient of the pionic chiral logarithm l(M) = M(2) log M(2) is unique and then perform the calculation. As a check we perform the reduction of the known three-flavour result. Our result can be used to perform the extrapolation to the physical pion mass of direct lattice QCD calculations of K -> pi pi at fixed m(s) or m(K)(2). The underlying arguments are expected to be valid for heavier particles and other processes as well. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：466 / 470

页数：5

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