The electric dipole moment (EDM) of an atom could arise also from $P$-odd and $T$-odd electron-nucleon couplings. In this work we investigate a general class of dimension-6 electron-nucleon ($e\text{−}N$) nonminimal interactions mediated by Lorentz-violating (LV) tensors of rank ranging from 1 to 4. The possible couplings are listed as well as their behavior under $C$, $P$, and $T$, allowing us to select the couplings compatible with EDM physics. The unsuppressed contributions of these couplings to the atom’s Hamiltonian can be read as EDM-equivalent. The LV coefficients’ magnitudes are limited using EDM experimental data to the level of $3.2\times {10}^{-13}{(\mathrm{GeV})}^{-2}$ or $1.6\times {10}^{-15}{(\mathrm{GeV})}^{-2}$.

• Received 28 February 2019

DOI:https://doi.org/10.1103/PhysRevD.100.015046

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

Published by the American Physical Society