Neutrinos and Gauge Unification
High Energy Physics - Phenomenology
2009-10-31 v1
Abstract
The approximate unification of gauge couplings is the best indirect evidence for low-energy supersymmetry, although it is not perfect in its simplest realizations. Given the experimental evidence for small non-zero neutrino masses, it is plausible to extend the MSSM with three right-handed neutrino chiral multiplets, with large Majorana masses below the unification scale, so that a see-saw mechanism can be implemented. In this extended MSSM, the unification prediction for the strong gauge coupling constant at M_Z can be lowered by up to \sim 5%, bringing it closer to the experimental value at 1\sigma, therefore improving significantly the accuracy of gauge coupling unification.
Cite
@article{arxiv.hep-ph/0004166,
title = {Neutrinos and Gauge Unification},
author = {J. A. Casas and J. R. Espinosa and A. Ibarra and I. Navarro},
journal= {arXiv preprint arXiv:hep-ph/0004166},
year = {2009}
}
Comments
5 pages, LaTeX, 1 figure