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arXiv · 2508.21820

QCD axion from chiral gauge theories

Ryosuke Sato·Shonosuke Takeshita
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Abstract

We present models of axion based on supersymmetric chiral gauge theories. In these models, the PQ symmetry is spontaneously broken by the non-perturbative dynamics of chiral gauge theory. Thanks to supersymmetry, IR dynamics of the models are calculable. We also present an example of a QCD axion model that is compatible with SU(5) grand unification. We find that in order to realize the gauge coupling unification with a certain precision, the GUT scale is the same with the PQ breaking scale, and the SUSY breaking scale is ${\cal O} (10^9)~{\rm GeV} $.

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Ryosuke Sato, Shonosuke Takeshita. 2025-08-29. QCD axion from chiral gauge theories. https://arxiv.org/abs/2508.21820

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