Dark Matter-Induced Multi-Phase Dynamical Symmetry Breaking

TL;DR

This paper explores a scale-invariant Higgs-dilaton model extended with a dark matter scalar, revealing a close link between dark matter properties and Higgs phenomenology, with testable predictions for future experiments.

Contribution

It introduces a minimal dark matter extension to the Higgs-dilaton model, showing compatibility with observed relic abundance and making testable predictions for direct detection.

Findings

Model matches observed dark matter relic abundance.

Higgs boson remains light near phase boundary.

Predicted direct detection cross section is testable.

Abstract

We consider the classically scale invariant Higgs-dilaton model of dynamical symmetry breaking extended with an extra scalar field that plays the role of dark matter. The Higgs boson is light near a critical boundary between different symmetry breaking phases, where quantum corrections beyond the usual Gildener-Weinberg approximation become relevant. This implies a tighter connection between dark matter and Higgs phenomenology. The model has only three free parameters, yet it allows for the observed relic abundance of dark matter while respecting all constraints. The direct detection cross section mediated by the Higgs boson is determined by the dark matter mass alone and is testable at future experiments.