A minimal non-supersymmetric SO(10) model with Peccei--Quinn symmetry

Sofiane M. Boucenna; Tommy Ohlsson; Marcus Pernow

doi:10.1016/j.physletb.2019.03.045

paper

A minimal non-supersymmetric SO(10) model with Peccei--Quinn symmetry

arXiv:1812.10548 · doi:10.1016/j.physletb.2019.03.045

Abstract

We present a minimal non-supersymmetric SO(10) GUT breaking directly to the Standard Model gauge group. Precise gauge coupling unification is achieved due to the presence of two color-octet scalars, one of which is accessible to LHC searches. Proton lifetime is predicted to be below $4.5 \times 1 0^{34}$ years, which is within the projected five-year sensitivity of the proposed Hyper-Kamiokande experiment. We find that the Standard Model observables are reproduced to a reasonable accuracy in a numerical fit, which also predicts the unknown neutrino parameters. Finally, the two scalar representations stabilize the electroweak vacuum and the dark matter is comprised of axions.

7 pages, 3 figures. Final version published in Phys. Lett. B. Corrected units in Eq. (13)