Electric dipole moments from CP-violating scalar leptoquark interactions
We analyze the implications of CP-violating scalar leptoquark (LQ) interactions for experimental probes of parity- and time-reversal violating properties of polar molecules. These systems are predominantly sensitive to the electric dipole moment (EDM) of the electron and nuclear-spin-independent (NSID) electron–nucleon interaction. The LQ model can generate both a tree-level NSID interaction as well as the electron EDM at one-loop order. Including both interactions, we find that the NSID interaction can dominate the molecular response. For moderate values of couplings, the current experimental results give roughly two orders of magnitude stronger limits on the electron EDM than one would otherwise infer from a sole-source analysis.
Additional Information© 2018 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3. Received 21 April 2018, Revised 13 October 2018, Accepted 12 November 2018, Available online 22 November 2018. We are grateful to Timothy Chupp for useful discussions and Vincenzo Cirigliano for detailed analytic results on the leptoquark interactions. KF thanks Hao-Lin Li, Hiren Patel and Jiang-Hao Yu for several helpful conversations. This work was supported in part under U.S. Department of Energy contract DE-SC0011095.
Published - 1-s2.0-S0370269318308566-main.pdf
Submitted - 1804.01137.pdf