Higgs Assisted Q-balls from Pseudo-Nambu-Goldstone Bosons

TL;DR

This paper demonstrates that stable, large Q-balls can form from light pseudo-Nambu-Goldstone bosons in models with strong TeV-scale dynamics, with potential implications for dark matter and Higgs physics.

Contribution

It introduces a novel mechanism for Q-ball formation from pNGB fields in Higgs-related models, analyzing their properties and stability conditions.

Findings

Stable Q-balls exist over a range of parameters.

Q-balls are weakly bound and parametrically large.

Interactions with the Higgs are determined by scale symmetry breaking.

Abstract

Motivated by recent constructions of TeV-scale strongly-coupled dynamics, either associated with the Higgs sector itself as in pseudo-Nambu-Goldstone boson (pNGB) Higgs models or in theories of asymmetric dark matter, we show that stable solitonic Q- balls can be formed from light pion-like pNGB fields carrying a conserved global quantum number in the presence of the Higgs field. We focus on the case of thick-wall Q-balls, where solutions satisfying all constraints are shown to exist over a range of parameter values. In the limit that our approximations hold, the Q-balls are weakly bound and parametrically large, and the form of the interactions of the light physical Higgs with the Q-ball is determined by the breaking of scale symmetry.