Ultraviolet completion of pseudo-Nambu-Goldstone dark matter with a hidden U(1) gauge symmetry

TL;DR

This paper introduces a simpler ultraviolet completion model for pseudo-Nambu-Goldstone dark matter with a hidden U(1) gauge symmetry, suppressing direct detection signals and analyzing various phenomenological constraints.

Contribution

It presents a novel, simplified UV completion framework for pseudo-Nambu-Goldstone dark matter with a hidden U(1), addressing detection constraints and decay mechanisms.

Findings

Dark matter scattering off nucleons is highly suppressed.

The ultraviolet scale must exceed 10^{10} GeV to ensure dark matter stability.

Phenomenological constraints from Higgs measurements and relic density are satisfied.

Abstract

We propose an ultraviolet completion model for pseudo-Nambu-Goldstone dark matter with a hidden $\mathrm{U}(1)$ gauge symmetry. Compared to previous studies, this setup is simpler, introducing less interactions. Dark matter scattering off nucleons is highly suppressed by the ultraviolet scale and direct detection constraints can be easily evaded. The kinetic mixing between the hidden $\mathrm{U}(1)$ and the $\mathrm{U}(1)_\mathrm{Y}$ gauge fields would lead to dark matter decays. We find that the current bound on the dark matter lifetime implies that the ultraviolet scale should be higher than $10^{10}~\mathrm{GeV}$. The phenomenological constraints from the 125 GeV Higgs measurements, the dark matter relic density, and indirect detection of dark matter annihilation are also investigated.