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Updated: Apr 19, 2026

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
New confining force solution of the QCD axion domain-wall problem
1Department of Physics and Astronomy, Bartol Research Institute, University of Delaware, Newark, Delaware 19716, USA.
Abstract:
The serious cosmological problems created by the axion-string-axion-domain-wall system in standard axion models are alleviated by positing the existence of a new confining force. The instantons of this force can generate an axion potential that erases the axion strings long before QCD effects become important, thus preventing QCD-generated axion walls from ever appearing. Axion walls generated by the new confining force would decay so early as not to contribute significantly to the energy in axion dark matter.
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