Flat-Directions in Grand Unification With $U(1)_R$ Symmetry
High Energy Physics - Phenomenology
2007-05-23 v1
Abstract
It is shown that in SO(10) and SU(5) models having a symmetry, the requirement of breaking the unified group to the Standard Model leads to flat directions in the scalar potential. These can lead to a ``cosmological modulus problem". This is relevant to grand unified models of inflation, where symmetries are often used to insure the flatness of the inflaton potential. A way that the modulus problem might be avoided is discussed.
Cite
@article{arxiv.hep-ph/0511097,
title = {Flat-Directions in Grand Unification With $U(1)_R$ Symmetry},
author = {S. M. Barr and Bumseok Kyae and Qaisar Shafi},
journal= {arXiv preprint arXiv:hep-ph/0511097},
year = {2007}
}
Comments
1+17 pages, 1 eps figure