Reevaluation of Neutron Electric Dipole Moment with QCD Sum Rules
High Energy Physics - Phenomenology
2012-07-17 v2
Abstract
We study the neutron electric dipole moment in the presence of the CP-violating operators up to the dimension five in terms of the QCD sum rules. It is found that the OPE calculation is robust when exploiting a particular interpolating field for neutron, while there exist some uncertainties on the phenomenological side. By using input parameters obtained from the lattice calculation, we derive a conservative limit for the contributions of the CP violating operators. We also show the detail of the derivation of the sum rules.
Keywords
Cite
@article{arxiv.1204.2653,
title = {Reevaluation of Neutron Electric Dipole Moment with QCD Sum Rules},
author = {Junji Hisano and Jeong Yong Lee and Natsumi Nagata and Yasuhiro Shimizu},
journal= {arXiv preprint arXiv:1204.2653},
year = {2012}
}
Comments
33 pages, 5 figures