A letter titled "Demonstration of deuterium's enhanced sensitivity to symmetry violations governed by the Standard-Model Extension" has been submitted recently containing the main results of the PhD thesis of Amit Nanda.

Please find the preprints on the [arXiv].

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 non-relativistic proton coefficients of the Standard-Model Extension framework have been addressed. The spin-independent coefficients with momentum power =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 =2 and 4, respectively. Furthermore, we find a deuterium zero-field hyperfine splitting of 327.3843549(28) MHz. This is in agreement with the literature and presents the most precise in-beam measurement of this quantity.