Charged pion polarizabilities to two loops

被引：61

作者：

Burgi, U

机构：

[1] Inst. für Theoretische Physik, Universität Bern, CH-3012 Bern

来源：

PHYSICS LETTERS B | 1996年 / 377卷 / 1-3期

关键词：

D O I：

10.1016/0370-2693(96)00304-8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We evaluate the electric and magnetic polarizabilities of charged pions in the framework of chiral perturbation theory at next-to-leading order. This requires a two-loop evaluation of the Compton amplitude near threshold. We estimate the two new low-energy constants which enter the chiral expansion at this order with resonance saturation. The numerical results are compared with presently available experimental information.

引用

页码：147 / 152

页数：6

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