Right-handed Neutrino Dark Matter, Neutrino Masses, and non-Standard Cosmology in a 2HDM

TL;DR

This paper investigates right-handed neutrino dark matter within a Two Higgs Doublet Model, highlighting unique detection signals, the role of non-standard cosmology, and the model's ability to address neutrino masses and flavor issues.

Contribution

It introduces a novel dark matter production mechanism involving non-standard cosmology and Abelian gauge symmetry in a 2HDM, linking neutrino masses and flavor problem solutions.

Findings

Dark matter scattering depends on dark matter spin, differing from standard models.

Non-standard cosmology enables new dark matter relic density mechanisms.

Parameter space satisfies collider, unitarity, and detection constraints.

Abstract

We explore the dark matter phenomenology of a weak-scale right-handed neutrino in the context of a Two Higgs Doublet Model. The expected signal at direct detection experiments is different from the usual spin-independent and spin-dependent classification since the scattering with quarks depends on the dark matter spin. The dark matter relic density is set by thermal freeze-out and in the presence of non-standard cosmology, where an Abelian gauge symmetry is key for the dark matter production mechanism. We show that such symmetry allows us to simultaneously address neutrino masses and the flavor problem present in general Two Higgs Doublet Model constructions. Lastly, we outline the region of parameter space that obeys collider, perturbative unitarity and direct detection constraints.