Chiral expansion of the π0 → γγ decay width

被引：0

作者：

Li, Bing An ^{[1
]}

机构：

[1] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA

来源：

PHYSICAL REVIEW D | 2012年 / 85卷 / 09期

关键词：

PERTURBATION-THEORY; MASS;

D O I：

10.1103/PhysRevD.85.094031

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A chiral field theory of mesons has been applied to study the contribution of the current quark masses to the pi(0) -> gamma gamma decay width at the next leading order. In this study, the large N-C limit is assumed in order that the approach performed is consistent. The consequence that some low-energy constants from L(6)(WZW) can be read off from the final expressions is an interesting result. (1.44 +/- 0.67)% enhancement has been predicted and there is no new parameter.

引用

页数：6

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