Work

Fermion-Selective Tests of New Physics with the Bound-Electron g Factor

Year: 2025

Type: article

Abstract: The use of high-precision measurements of the g factor of single-electron ions is considered as a detailed probe for physics beyond the standard model. The contribution of the exchange of a hypothetical force-carrying scalar boson to the g factor is calculated for the ground state of H-like ions and used to derive bounds on the parameters of that force. Similarly to the isotope shift, we employ the nuclide shift, i.e., the difference for elements with different proton and/or neutron numbers, in order to increase the experimental sensitivity to the new physics contribution. In particular we find, combining available measurements with current precision with different ions, that the coupling constant for the interaction between an electron and a proton can be constrained up to 3 orders of magnitude better than with the best current atomic data and theory.

Source: Physical Review Letters

DOI: 10.1103/zyb6-lvy8

Authors: M. Moretti, C. H. Keitel, Z. Harman

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: $3,750

Funder: Deutsche Forschungsgemeinschaft