Abstract
Standard model violation associated with the phase of the Cabibbo-Kobayashi-Maskawa quark mixing matrix is known to give small answers for the electric dipole moment (EDM) observables. Moreover, predictions for the EDMs of neutrons and diamagnetic atoms suffer from considerable uncertainties. We point out that the -violating observables associated with the electron spin (paramagnetic EDMs) are dominated by the combination of the electroweak penguin diagrams and weak transitions in the baryon sector, and are calculable within chiral perturbation theory. The predicted size of the semileptonic operator is , which corresponds to the equivalent electron EDM . While still far from the current observational limits, this result is 3 orders of magnitude larger than previously believed.
- Received 14 March 2022
- Accepted 5 October 2022
DOI:https://doi.org/10.1103/PhysRevLett.129.231801
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