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.

引用

页码：5297 / 5300

页数：4

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