Two-loop self-energy contribution to the Lamb shift in H-like ions

Abstract

The two-loop self-energy correction is evaluated to all orders in Zαfor the ground-state Lamb shift of H-like ions with Z >= 10, where Z is the nuclear charge number and αis the fine structure constant. The results obtained are compared with the analytical values for the Zα-expansion coefficients. An extrapolation of the all-order numerical results to Z=1 is presented and implications of our calculation for the hydrogen Lamb shift are discussed.

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• On the rms-radius of the proton
• Two-Loop Bethe Logarithms
• Perturbation Approach to the Self Energy of non-S Hydrogenic States

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