Suppressing dimension-5 operators in general SU(5) models
Abstract
We discuss dimension-5 operators in supersymmetric models containing extra hypercharge 1/3 color-triplets. We derive a general formula relating dimension-5 operator to the color-triplet mass matrix. We show that certain zeros in the triplet mass-matrix together with some triplet coupling selection rules can lead to elimination of dimension-5 operators. In particular we focus on SU(5) models and show that (a) Dimension-5 operators can be eliminated in the standard SU(5) model by the introduction of an extra pair of 5+5b Higgses with specific couplings (b) Flipped SU(5) models with extra 10+10b Higgses are free of dimension-5 operators (c) Flipped SU(5) models with extra 5+5b and/or extra 10+10b Higgses can be made free of dimension-5 operators for a textured form of the triplet mass-matrix accompanied by constraints on the 5-plet couplings to matter. Our analysis is motivated by the recently put forward M-theory phenomenological framework that requires a strong string coupling and reintroduces the problem of eliminating dimension-5 operators.
Cite
@article{arxiv.hep-ph/9807289,
title = {Suppressing dimension-5 operators in general SU(5) models},
author = {M. E. Gomez and J. Rizos and K. Tamvakis},
journal= {arXiv preprint arXiv:hep-ph/9807289},
year = {2016}
}
Comments
10 pages, Latex2e, minor changes, references added