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Updated: Aug 5, 2026

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Demonstration of Deuterium's Enhanced Sensitivity to Symmetry Violations Governed by the Standard-Model Extension
A Nanda1,2, D Comparat3, O Dulieu3
1Stefan Meyer Institute for Subatomic Physics, Dominikanerbastei 16, 1010 Vienna, Austria.
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.
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