Leading Logarithmic Contribution to the Second-Order Lamb Shift Induced by the Loop-After-Loop Diagram
- 5 March 2001
- journal article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 86 (10) , 1990-1993
- https://doi.org/10.1103/physrevlett.86.1990
Abstract
The contribution of order alpha(2)(Zalpha)(6)ln (3)(Zalpha)(-2) to the ground-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, 541 (1993)]. As a result, agreement is achieved for this correction between different numerical and analytical methods.Keywords
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