From axion quality and naturalness problems to a high-quality ZN QCD relaxion

Abhishek Banerjee, Joshua Eby, Gilad Perez

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10 Citations (Scopus)

Abstract

We highlight general issues associated with quality and naturalness problems in theories of light QCD axions, axionlike particles, and relaxions. We show that the presence of Planck-suppressed operators generically lead to scalar coupling of axions with the Standard Model. We present a new class of ZN 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.

Original languageEnglish
Article number115011
JournalPhysical Review D
Volume107
Issue number11
DOIs
Publication statusPublished - 1 Jun 2023

Funding

Funding Information: We want to thank Javi Serra, Stelzl Stefan, and Andreas Weiler for critical comments on an early version of this work. We also want to thank Kfir Blum for useful discussions. A. B. and G. P. acknowledge MITP and the Aspen Center for Physics for their hospitality and support where the part of the work was performed. The work of A. B. is supported by the Azrieli foundation. The work of J. E. was supported by the World Premier International Research Center Initiative (WPI), MEXT, Japan, and by the JSPS KAKENHI Grants No. 21H05451 and No. 21K20366. The work of G. P. is supported by grants from BSF-NSF, Friedrich Wilhelm Bessel research award, GIF, ISF, Minerva, the SABRA Yeda-Sela WRC Program, the Estate of Emile Mimran, and the Maurice and Vivienne Wohl Endowment. Publisher Copyright: © 2023 authors. Published by the American Physical Society.

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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