Work

Two-loop electron self-energy in the bound-electron g factor: Diagrams in momentum-coordinate representation

Year: 2025

Type: article

Abstract: The two-loop electron self-energy correction is one of the most problematic QED effects and, for a long time, was the dominant source of uncertainty in the theoretical prediction of the bound-electron g factor in hydrogenlike ions. A major breakthrough was recently achieved by B. Sikora [], who calculated this effect without any expansion in the nuclear binding strength parameter Z α (where Z is the nuclear charge number and α is the fine-structure constant). In this paper we describe our calculations of one of the most difficult parts of the two-loop self-energy, represented by Feynman diagrams that are treated in the mixed momentum-coordinate representation.

Source: Physical Review A

DOI: 10.1103/yflg-7wz4

Authors: V. A. Yerokhin, B. Sikora, Z. Harman, C. H. Keitel

Institution: Max Planck Institute for Nuclear Physics

Language: English

Topic: Atomic and Molecular Physics

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,675

Funder: Deutsche Forschungsgemeinschaft