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arXiv · 2404.00997

Magnetic axion vortex and very light QCD axions

Deog Ki Hong·Stephen J. Lonsdale
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Abstract

We show that a stable vortex soliton, carrying a constant magnetic flux, exists in the homogeneous medium of axions with a constant time-derivative. Axions can be bound in the vortex, having energy less than the axion mass. If the observed magnetic fields in galaxies are those of the vortex, the axion-photon coupling has to be smaller than $10^{-17}\,{\rm GeV^{-1}}$. Otherwise, axions decay too quickly to constitute dark matter in galaxies.

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Deog Ki Hong, Stephen J. Lonsdale. 2024-04-01. Magnetic axion vortex and very light QCD axions. https://arxiv.org/abs/2404.00997

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