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From axion quality and naturalness problems to a high-quality $\mathbb{Z}_{N}$ QCD relaxion

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arxiv 2210.05690 v3 pith:QVVXIH6O submitted 2022-10-11 hep-ph hep-th

Abhishek Banerjee , Joshua Eby , Gilad Perez This is my paper · ORCID
classification hep-phhep-th
keywords qualityrelaxionclassmathbbmodelsnaturalnessproblemproblems
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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 Standard model. We present a new class of $\mathbb Z_{N}$ 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.

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  1. Accidental Peccei-Quinn Symmetry From Gauged U(1) and a High Quality Axion

    hep-ph 2024-12 conditional novelty 6.0 of 10

    Three explicit axion models are built where a gauged axial U(1) makes the Peccei-Quinn symmetry accidental, preserving axion quality against quantum gravity and giving domain wall number one.

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