WIMP Dark Matter and Neutrino Mass from Peccei-Quinn Symmetry

TL;DR

This paper explores how the Peccei-Quinn symmetry can simultaneously address the strong CP problem, generate neutrino masses, and provide a stable dark matter candidate, with testable predictions for experiments.

Contribution

It proposes two models linking Peccei-Quinn symmetry to dark matter and neutrino mass, predicting detectable signals in current experiments.

Findings

Stable WIMP dark matter candidates identified.

Neutrino masses generated radiatively.

Testable signals at direct detection experiments and LHC.

Abstract

The Peccei-Quinn anomalous global U(1)_{PQ} symmetry is important not only for solving the strong CP problem with a cosmologically relevant axion, but it may also be the origin of a residual Z_2 symmetry. This new symmetry may be responsible for a second component of dark matter composed of an absolutely stable Weakly Interacting Massive Particle, as well as for generating radiative neutrino mass. Two specific realizations of this idea are proposed. In these scenarios, dark matter detection is guaranteed at existing direct detection experiments or axion searches. Observable signals at the Large Hadron Collider are discussed.