We present a complete three-loop calculation of the electric dipole moment of the u and d quarks in the Standard Model. For the d quark, more relevant for the experimentally important neutron electric dipole moment, we find cancellations which lead to an order of magnitude suppression compared with previous estimates.
Cite
@article{arxiv.hep-ph/9704355,
title = {Neutron Electric Dipole Moment In The Standard Model: Valence Quark Contributions},
author = {Andrzej Czarnecki and Bernd Krause},
journal= {arXiv preprint arXiv:hep-ph/9704355},
year = {2014}
}