Within a systematic approach based on dimensionally regularized nonrelativistic quantum electrodynamics, we derive a complete result for the two-loop correction to order (bullet 2(b1)4 for the factor of an electron bound in an state of a hydrogenlike ion. The results obtained significantly improve the accuracy of the theoretical predictions for the hydrogenlike carbon and oxygen ions and influence the value of the electron mass inferred from par-factor measurements.
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|Publication status||Published - Aug 1 2005|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics