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arXiv · 1805.06011

Dark Glueballs and their Ultralight Axions

James Halverson·Brent D. Nelson·Fabian Ruehle·Gustavo Salinas
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Abstract

Dark gauge sectors and axions are well-motivated in string theory. We demonstrate that if a confining gauge sector gives rise to dark glueballs that are a fraction of the dark matter, and the associated axion has a decay constant near the string scale, then this axion is ultralight and naturally realizes the fuzzy dark matter scenario with a modest tuning of a temperature ratio. Astrophysical observations constrain the size of the glueball component relative to the axionic component, while electric dipole moments constrain mixing with the QCD axion.

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James Halverson, Brent D. Nelson, Fabian Ruehle, Gustavo Salinas. 2018-05-15. Dark Glueballs and their Ultralight Axions. https://doi.org/10.1103/physrevd.98.043502

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