Perturbed orbital contribution to the two-loop lamb shift in hydrogen

被引：68
|
作者：
Mallampalli, S [1 ]
Sapirstein, J
机构：
[1] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA
[2] San Diego Supercomp Ctr, San Diego, CA USA
来源：
PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 24期
关键词：
D O I：
10.1103/PhysRevLett.80.5297
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A part of the two-loop Lamb shift called the perturbed orbital term is evaluated with exact Dirac-Coulomb propagators. It is shown to be the most nonperturbative function of Z alpha yet encountered in QED, so much so that even at Z = 1 the leading term in its Z alpha expansion is of the opposite sign from the complete answer. The higher order contributions are -71(1) kHz to the ground state Lamb shift in hydrogen and -8.9(1) and -346(1) kHz to the n = 2 Lamb shift in hydrogen and He+, respectively.
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收藏
页码：5297 / 5300
页数：4
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