High quality QCD axion in the Standard Model
Abstract
Although the axion is the most compelling solution to the strong C P problem, the introduced global Peccei-Quinn symmetry suffers from a severe fine-tuning problem known as the . In this letter, we show that the discrete gauge symmetry Z 4 × Z 3 motivated from the internal structure of the standard model can naturally predict a high-quality axion, leading to a distinct and testable parameter space. Remarkably, this minimal framework simultaneously accounts for neutrino masses, baryon asymmetry, and dark matter.
Fields of Study & Subjects
Particle physics theoretical and experimental studies
Dark Matter and Cosmic Phenomena
Computational Physics and Python Applications
Publication details
- Journal / source
- Physical review. D/Physical review. D.
- Publisher
- American Physical Society (APS)
- Volume
- 113
- Issue
- 5
- Publication date
- 11 February 2026
- Language
- EN