Two-loop QED corrections with closed fermion loops
Atomic Physics
2009-11-13 v2
Abstract
We report a calculation of all two-loop QED corrections with closed fermion loops for the n=1 and n=2 states of H-like ions and for a wide range of the nuclear charge numbers Z=1-100. The calculation is performed to all orders in the binding-strength parameter (Z \alpha), with the exception that in a few cases the free-loop approximation is employed in the treatment of the fermion loops. Detailed comparison is made with previous (Z \alpha)-expansion calculations and the higher-order remainder term to order \alpha^2 (Z \alpha)^6 is identified.
Keywords
Cite
@article{arxiv.0803.4305,
title = {Two-loop QED corrections with closed fermion loops},
author = {V. A. Yerokhin and P. Indelicato and V. M. Shabaev},
journal= {arXiv preprint arXiv:0803.4305},
year = {2009}
}
Comments
Analysis of the finite nuclear size effect is extended in the revised version. 12 pages, 5 figures, 4 tables