Demonstration of Deuterium’s Enhanced Sensitivity to Symmetry Violations Governed by the Standard-Model Extension
Year: 2026
Type: article
Abstract: We have performed hyperfine spectroscopy of two transitions in ground-state deuterium and searched for violations of CPT and Lorentz symmetry that would manifest as sidereal variations of the observed transition frequencies. Several nonrelativistic proton coefficients of the Standard-Model extension framework have been addressed. The spin-independent coefficients with momentum power k=2, 4 are constrained for the first time. Bounds on spin-dependent coefficients are improved by exploiting a sensitivity enhancement originating from the relative momenta of the nucleons in the deuteron. The best previous constraints by hydrogen maser measurements are surpassed by 4 and 14 orders of magnitude for coefficients with k=2 and 4, respectively.
Source: Physical Review Letters
DOI: 10.1103/dqvd-15q4
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,750
Funders: TRIUMF, Agence Nationale de la Recherche, Österreichischen Akademie der Wissenschaften, Austrian Science Fund, Ministère de l'Education Nationale, de l'Enseignement Superieur et de la Recherche, Région Auvergne-Rhône-Alpes, Horizon 2020 Framework Programme, H2020 Marie Skłodowska-Curie Actions
OpenAlex ID: W4414938476