R. S. Gupta
Small instantons and the strong CP problem in composite Higgs models
Gupta, R. S.; Khoze, V. V.; Spannowsky, M.
Professor Valentin Khoze firstname.lastname@example.org
Professor Michael Spannowsky email@example.com
We show that QCD instantons can generate large effects at small length scales in the ultraviolet in standard composite Higgs models that utilize partial compositeness. This has important implications for possible solutions of the strong CP problem in these models. First we show that in the simplest known UV completions of composite Higgs models, if an axion is also present, it can have a mass much larger than the usual QCD axion. Even more remarkable is the case where there are no axions, but the strong CP problem can be solved by generating the up quark mass entirely from the contribution of instantons thus reviving the massless up-quark solution for these models. In both cases no additional field content is required apart from what is required to realize partial compositeness.
Gupta, R., Khoze, V., & Spannowsky, M. (2021). Small instantons and the strong CP problem in composite Higgs models. Physical Review D, 104(7), Article 075011. https://doi.org/10.1103/physrevd.104.075011
|Journal Article Type||Article|
|Acceptance Date||Sep 9, 2021|
|Online Publication Date||Oct 7, 2021|
|Publication Date||Oct 1, 2021|
|Deposit Date||Jan 19, 2022|
|Publicly Available Date||Jan 20, 2022|
|Journal||Physical Review D|
|Publisher||American Physical Society|
|Peer Reviewed||Peer Reviewed|
Published Journal Article (Advance online version)
Publisher Licence URL
Advance online version Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
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