Six Higgs Doublets Model for Dark Matter

TL;DR

This paper proposes a six Higgs doublet extension of the Standard Model that unifies gauge couplings without supersymmetry and introduces a stable dark matter candidate consistent with current experimental constraints.

Contribution

It introduces a novel six Higgs doublet model that achieves gauge coupling unification and provides a viable dark matter candidate stabilized by a discrete symmetry.

Findings

Model unifies gauge couplings without supersymmetry.

Dark matter candidate satisfies relic density and detection constraints.

Viability confirmed at a specific benchmark point.

Abstract

We consider an extension of the Higgs sector in the standard model (SM) with six Higgs doublets. The gauge couplings are unified without supersymmetry in this model. The lightest of the extra Higgs particles, being stabilized by a discrete symmetry imposed from the outset, presents a plausible candidate for dark matter. For a specific acceptable benchmark point, we show that the model is viable regarding the constraints of relic density, direct detection and invisible Higgs decay. We comment on the mean free path of the dark matter candidate.