Effective field theory approach to pionium

被引：33

作者：

Eiras, D

Soto, J

机构：

[1] Univ Barcelona, Dept Estructura & Constituents Mat, E-08028 Barcelona, Spain

[2] Univ Barcelona, Inst Fis Altes Energies, E-08028 Barcelona, Spain

来源：

PHYSICAL REVIEW D | 2000年 / 61卷 / 11期

关键词：

D O I：

10.1103/PhysRevD.61.114027

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The various dynamical scales below the pion mass involved in pi(+) pi(-) atoms are sequentially integrated out using nonrelativistic effective field theory techniques. This allows us to systematically organize the corrections to the energy levels and decay width. We present our results in terms of a single unknown constant which may be obtained by matching to the chiral Lagrangian with electromagnetic interactions at two loops.

引用

页码：1 / 11

页数：11

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