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28 April 2024

» arxiv » 2210.05690

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From axion quality and naturalness problems to a high-quality $mathbb{Z}_{4mathcal{N}}$ QCD relaxion
Abhishek Banerjee ; Joshua Eby ; Gilad Perez ;
Date:	11 Oct 2022
Abstract:	We highlight general issues associated with quality and naturalness problems in theories of light QCD-axions, axion-like particles, and relaxions. We show the presence of Planck-suppressed operators generically lead to scalar coupling of axions with the SM. We present a new class of $mathbb{Z}_{4mathcal{N}}$ QCD relaxion models that can address both the QCD relaxion CP problem as well as its quality problem. This new class of models also leads to interesting experimental signatures, which can be searched for at the precision frontier.
Source:	arXiv, 2210.05690
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