Leading logarithmic contribution to the second-order lamb shift induced bythe loop-after-loop diagram

Authors
Yerokhin, VA
Citation
Va. Yerokhin, Leading logarithmic contribution to the second-order lamb shift induced bythe loop-after-loop diagram, PHYS REV L, 86(10), 2001, pp. 1990-1993
Citations number
14
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
86
Issue
10
Year of publication
2001
Pages
1990 - 1993
Database
ISI
SICI code
0031-9007(20010305)86:10<1990:LLCTTS>2.0.ZU;2-Z
Abstract
The contribution of order alpha (2)(Z alpha)(6)ln(3)(Z alpha)(-2) to the gr ound-state Lamb shift in hydrogen induced by the loop-after-loop diagram is evaluated analytically. An additional contribution of this order is found compared to the previous calculation by Karshenboim [Sov. Phys. JETP 76, 51 1 (1993)]. As a result, agreement is achieved for this correction between d ifferent numerical and analytical methods.