Dimension-Five Operators in Grand Unified Theories
High Energy Physics - Phenomenology
2008-11-26 v3
Abstract
Extensions of the standard model with low-energy supersymmetry generically allow baryon- and lepton-number violating operators of dimension four and five, yielding rapid proton decay. The dimension-four operators are usually forbidden by matter parity. We investigate to what extent the appearance of dimension-five operators at the Planck scale may be constrained by the different grand-unified gauge groups. Dimension-five operators are suppressed in models based on E_6 and SU(3)_C x SU(3)_L x SU(3)_R, where four matter fields do not form a gauge singlet. An intermediate scale offers the possibility to sufficiently suppress these dimension-five operators.
Cite
@article{arxiv.hep-ph/0605293,
title = {Dimension-Five Operators in Grand Unified Theories},
author = {Joshua Sayre and Soren Wiesenfeldt and Scott Willenbrock},
journal= {arXiv preprint arXiv:hep-ph/0605293},
year = {2008}
}
Comments
4 pages, v3: version to appear in PRD