Year: 2018
Type: article
Abstract: We discuss fermionic dark matter in non-supersymmetric E6 Grand Unification. The fundamental representation of E6 contains, in addition to the standard model fermions, exotic fermions and we argue that one of them is a viable, interesting dark matter candidate. Its stability is guaranteed by a discrete remnant symmetry, which is an unbroken subgroup of the E6 gauge symmetry. We compute the symmetry breaking scales and the effect of possible threshold corrections by solving the renormalization group equations numerically after imposing gauge coupling unification. Since the Yukawa couplings of the exotic and the standard model fermions have a common origin, the mass of the dark matter particles is constrained. We find a mass range of 3 · 109 GeV ≲ mDM ≲ 1 · 1013 GeV for our E6 dark matter candidate, which is within the reach of next-generation direct detection experiments.
Source: Journal of High Energy Physics
Author: Jakob Schwichtenberg
Institution: Karlsruhe Institute of Technology
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2607322126