g Factor of Lithiumlike Silicon: New Challenge to Bound-State QED
Abstract
The recently established agreement between experiment and theory for the g factors of lithiumlike silicon and calcium ions manifests the most stringent test of the many-electron bound-state quantum electrodynamics (QED) effects in the presence of a magnetic field. In this Letter, we present a significant simultaneous improvement of both theoretical gth=2.000 889 894 4 (34 ) and experimental gexp=2.000 889 888 45 (14 ) values of the g factor of lithiumlike silicon 28Si11 + . The theoretical precision now is limited by the many-electron two-loop contributions of the bound-state QED. The experimental value is accurate enough to test these contributions on a few percent level.
- Publication:
-
Physical Review Letters
- Pub Date:
- October 2019
- DOI:
- 10.1103/PhysRevLett.123.173001
- Bibcode:
- 2019PhRvL.123q3001G