WIMP Dark Matter and Neutrino Mass from Peccei-Quinn Symmetry

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.

5 pages, with 3 figures and 2 tables, v2: Comments on U(1) breaking to Z_2, references added

References in corpus (6)

• Gauge Singlet Scalars as Cold Dark Matter
• Precise Relic WIMP Abundance and its Impact on Searches for Dark Matter Annihilation
• Update on scalar singlet dark matter
• Goldstone Bosons as Fractional Cosmic Neutrinos
• Update of axion CDM energy density
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