Neutron Electric Dipole Moment In The Standard Model: Valence Quark Contributions
Andrzej Czarnecki, Bernd Krause
Abstract
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.
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