SU(5) Unification without Proton Decay
High Energy Physics - Phenomenology
2017-12-15 v2 High Energy Physics - Theory
Abstract
We construct a four-dimensional SU(5) grand unified theory in which the proton is stable. The Standard Model leptons reside in the 5 and 10 irreps of SU(5), whereas the quarks live in the 40 and 50 irreps. The SU(5) gauge symmetry is broken by the vacuum expectation values of the scalar 24 and 75 irreps. All non-Standard Model fields are heavy. Stability of the proton requires three relations between the parameters of the model to hold. However, abandoning the requirement of absolute proton stability, the model fulfills current experimental constraints without fine-tuning.
Keywords
Cite
@article{arxiv.1706.08535,
title = {SU(5) Unification without Proton Decay},
author = {Bartosz Fornal and Benjamin Grinstein},
journal= {arXiv preprint arXiv:1706.08535},
year = {2017}
}
Comments
5 pages; v2: accepted by Physical Review Letters