keV Neutrino Model Building

TL;DR

This paper reviews the theoretical frameworks and model building strategies for keV sterile neutrinos as dark matter candidates, covering cosmological, astrophysical, and experimental considerations.

Contribution

It provides a comprehensive, pedagogical overview of existing keV neutrino models, highlighting specific challenges and methods unique to this dark matter candidate.

Findings

Summarizes current neutrino data relevant to keV sterile neutrinos.

Reviews various models proposed in the literature for keV neutrino dark matter.

Discusses the cosmological and astrophysical constraints on keV neutrino models.

Abstract

We review the model building aspects for keV sterile neutrinos as Dark Matter candidates. After giving a brief discussion of some cosmological and astrophysical aspects, we first discuss the currently known neutrino data and observables. We then explain the purpose and goal of neutrino model building, and review some generic methods used. Afterwards certain aspects specific for keV neutrino model building are discussed, before reviewing the bulk of models in the literature. We try to keep the discussion on a pedagogical level, while nevertheless pointing out some finer details where necessary and useful. Ideally, this review should enable a grad student or an interested colleague from cosmology or astrophysics with some prior experience to start working on the field.