Pion-kaon scattering near the threshold in chiral SU(2) perturbation theory

被引：71

作者：

Roessl, A ^{[1
]}

机构：

[1] Univ Lausanne, Inst Phys Theor, Lausanne, Switzerland

来源：

NUCLEAR PHYSICS B | 1999年 / 555卷 / 03期

关键词：

chiral perturbation theory; pion kaon scattering; threshold parameters; chiral SU(2);

D O I：

10.1016/S0550-3213(99)00336-3

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

In the context of chiral SU(2) perturbation theory, pion-kaon scattering is analysed near the threshold to fourth chiral order. The scattering amplitude is calculated both in the relativistic framework and by using an approach similar to heavy baryon chiral perturbation theory. Both methods lead to equivalent results. We obtain relations between threshold parameters, valid to fourth chiral order, where all those combinations of low-energy constants which are not associated with chiral-symmetry breaking terms drop out. The remaining low-energy constants can be estimated using chiral SU(3) symmetry. Unfortunately, the experimental information is not precise enough to test our low-energy theorems. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：507 / 539

页数：33

共 39 条

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