Calculation of hard three-loop corrections of order mα7 to hyperfine splitting in muonium and positronium is reviewed. All these contributions are generated by the graphs with photon, electron and/or muon loop radiative insertions in the two-photon exchange diagrams. We calculate contributions of six gauge invariant sets of diagrams.
|Journal||International Journal of Modern Physics A|
|State||Published - Oct 20 2016|
Bibliographical noteFunding Information:
The work of V.S. was supported in part by the RFBR grant 14-02-00467.
© 2016 World Scientific Publishing Company.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Nuclear and High Energy Physics
- Astronomy and Astrophysics