Massive Dark Photons as Hot Dark Matter

TL;DR

This paper proposes that massive dark photons, arising from a broken abelian symmetry, could serve as hot dark matter candidates, with masses in the keV range linked to a weak symmetry breaking scale.

Contribution

It introduces a new model where massive dark photons originate from a broken U(1)' symmetry associated with weak number conservation, proposing them as hot dark matter candidates.

Findings

Dark photons can have keV-scale masses from weak symmetry breaking.

Such dark photons are viable candidates for hot dark matter.

The model links dark photon properties to a new abelian gauge symmetry.

Abstract

Motivated by the growing interest in the existence of new massive gauge bosons, we suggest that massive dark photons A0 can be a consequence of a broken new abelian symmetry U(1)'X. Such a dark symmetry U(1)'D is afterwards supposed to be associated with the conservation of the weak number W belonging to the Weakling Interacting Slim Particles U(1)'W, being a strong candidate for Hot Dark Matter. The latters correspond then to light dark photons m'A inf keV from a weak symmetry breaking scale sup 10keV.