Sum rules for CP-violating operators of Weinberg type
High Energy Physics - Phenomenology
2020-12-10 v6
Abstract
We estimate the size of the hadronic matrix elements of CP-violating three-gluon and four-gluon Weinberg operators using sum-rule techniques. In the three-gluon case, we are able to reproduce the expressions given in earlier works, while the four-gluon results obtained in this article are new. Our paper therefore represents the first systematic study of contributions to the electric dipole moment of the neutron due to CP-violating dimension-six and dimension-eight operators. We provide many details on both the derivation of the sum rules as well as the analysis of the uncertainties that plague our final predictions.
Keywords
Cite
@article{arxiv.1909.08955,
title = {Sum rules for CP-violating operators of Weinberg type},
author = {Ulrich Haisch and Amando Hala},
journal= {arXiv preprint arXiv:1909.08955},
year = {2020}
}
Comments
28 pages, 4 figures; v6: discussion on the proton electric dipole moment clarified