Dark matter and neutrino masses from a scale-invariant multi-Higgs portal

TL;DR

This paper proposes a scale-invariant extension of the Standard Model with a dark sector, incorporating right-handed neutrinos and scalars, to explain dark matter and neutrino masses, and assesses its testability through collider and detection experiments.

Contribution

It introduces a novel scale-invariant model with a dark gauge group, right-handed neutrinos, and scalar fields, analyzing its phenomenology and experimental viability.

Findings

Dark matter mass range consistent with current limits

Model can be tested by collider and direct detection experiments

Relic abundance and scattering cross sections computed

Abstract

We consider a classically scale invariant version of the Standard Model, extended by an extra dark $SU(2)_X$ gauge group. Apart from the dark gauge bosons and a dark scalar doublet which is coupled to the Standard Model Higgs through a portal coupling, we incorporate right-handed neutrinos and an additional real singlet scalar field. After symmetry breaking \`a la Coleman-Weinberg, we examine the multi-Higgs sector and impose theoretical and experimental constraints. In addition, by computing the dark matter relic abundance and the spin-independent scattering cross section off a nucleon we determine the viable dark matter mass range in accordance with present limits. The model can be tested in the near future by collider experiments and direct detection searches such as XENON 1T.