Composite Dark Matter from Strongly-Interacting Chiral Dynamics

TL;DR

This paper explores a class of chiral gauge theories where pseudo Nambu-Goldstone bosons serve as dark matter candidates, with all scales generated dynamically and potential collider signatures.

Contribution

It introduces a new class of minimal, calculable models with strongly-interacting chiral dynamics producing dark matter and predicts associated collider and astrophysical signals.

Findings

Dark matter candidate is a SM singlet with charged partners.

All new scales, including DM mass, are generated dynamically.

Models predict correlated signals for astrophysical and collider experiments.

Abstract

A class of chiral gauge theories is studied with accidentally-stable pseudo Nambu-Goldstone bosons playing the role of dark matter (DM). The gauge group contains a vector-like dark color factor that confines at energies larger than the electroweak scale, and a ${\rm U}(1)_D$ factor that remains weakly coupled and is spontaneously broken. All new scales are generated dynamically, including the DM mass, and the IR dynamics is fully calculable. We analyze minimal models of this kind with dark fermions transforming as non-trivial vector-like representations of the Standard Model (SM) gauge group. In realistic models, the DM candidate is a SM singlet and comes along with charged partners that can be discovered at high-energy colliders. The phenomenology of the lowest-lying new states is thus characterized by correlated predictions for astrophysical observations and laboratory experiments.