Corrections to Hyperfine Splitting and Lamb Shift Induced by the Overlapping Two-Loop Electron Self-Energy Insertion in the Electron Line
Eides, M. I. · Karshenboim, S. G. · Shelyuto, V. A.
Original · EN
Contributions to HFS and to the Lamb shift intervals of order α²(Zα)⁵ induced by the graph with the two-loop overlapping electron self-energy diagram inserted in the electron line are considered. Explicit expression for the overlapping two-loop self-energy diagram in the Fried-Yennie gauge is obtained. Contributions both to HFS and Lamb shift induced by the diagram containing such subgraph are calculated.
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