R-parity Violating Contribution to Neutron EDM at One-loop Order
Abstract
We present the full result for the down squark mass-squared matrix in the complete theory of supersymmetry without R-parity where all kind of R-parity violating terms are admitted without bias. An optimal parametrization, the single-VEV parametrization, is used. The major result is a new contribution to squark mixing, involving both bilinear and trilinear R-parity violating couplings. Among other things, the latter leads to neutron electric dipole moment at one-loop level. Similiar mechanism leading to electron electric dipole moment at the same level. We present here a short report on major features of neutron electric dipole moment from supersymmetry without R-parity and give the interesting constraints obtained.
Keywords
Cite
@article{arxiv.hep-ph/0004110,
title = {R-parity Violating Contribution to Neutron EDM at One-loop Order},
author = {Y. -Y. Keum and Otto C. W. Kong},
journal= {arXiv preprint arXiv:hep-ph/0004110},
year = {2009}
}
Comments
11 Revtex pages with 2 figures incoporated; original discussion compressed with some further result (beyond gluino diagram) included; version accepted to be published in Phys. Rev. Lett