Leading logarithmic contribution to the second-order Lamb shift induced by the loop-after-loop diagram

Details Leading logarithmic contribution to the second-order Lamb shift induced by the loop-after-loop diagram Leading logarithmic contribution to the second-order Lamb shift induced by the loop-after-loop diagram

2000-10-13

arxiv.org/abs/hep-ph/0010134v1

Phys.Rev.Lett. 86 (2001) 1990-1993

Physics

High Energy Physics

High Energy Physics - Phenomenology

RevTex, 9 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.86.1990

Contribution of order \alpha^2 (Z \alpha)^6 \ln^3(Z \alpha)^{-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 [JETP 76, 541 (1993)]. As a result, an agreement is achieved for this correction between different numerical and analytical methods.

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