Two-loop corrections to the decay rate of parapositronium

被引：12

作者：

Adkins, GS ^{[1
]}

McGovern, NM

Fell, RN

Sapirstein, J

机构：

[1] Franklin & Marshall Coll, Lancaster, PA 17604 USA

[2] Brandeis Univ, Waltham, MA 01742 USA

[3] Univ Notre Dame, Notre Dame, IN 46556 USA

来源：

PHYSICAL REVIEW A | 2003年 / 68卷 / 03期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevA.68.032512

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Order-alpha(2) corrections to the decay rate of parapositronium are calculated. A QED scattering calculation of the amplitude for electron-positron annihilation into two photons at threshold is combined with the technique of effective field theory to determine a nonrelativistic QED Hamiltonian, which is then used in a bound-state calculation to determine the decay rate. Our result for the two-loop correction is 5.124 3(33) in units of (alpha/pi)(2) times the lowest-order rate. This is consistent with but more precise than the result 5.1(3) of a previous calculation.

引用

页数：11

共 42 条

[1] Order-α radiative correction to the rate for parapositronium decay to four photons [J].