References & Citations
High Energy Physics - Phenomenology
Title: Light Sterile Neutrinos and a High-Quality Axion from a Holographic Peccei-Quinn Mechanism
(Submitted on 29 Jul 2021 (v1), last revised 29 Mar 2022 (this version, v2))
Abstract: We present a 5D axion-neutrino model that explains the Standard Model fermion mass hierarchy and flavor structure, while simultaneously generating a high-quality axion. The axion and right-handed neutrinos transform under a 5D Peccei-Quinn gauge symmetry, and have highly suppressed profiles on the UV brane where the symmetry is explicitly broken. This setup allows neutrinos to be either Dirac, or Majorana with hierarchically small sterile neutrino masses. The axion decay constant originates from the IR scale, which in the holographically dual 4D description corresponds to the confinement scale of some new strong dynamics with a high-quality global Peccei-Quinn symmetry that produces a composite axion and light, composite sterile neutrinos. The sterile neutrinos could be observed in astrophysical or laboratory experiments, and the model predicts specific axion--neutrino couplings.
Submission history
From: Peter Cox [view email][v1] Thu, 29 Jul 2021 14:29:02 GMT (313kb,D)
[v2] Tue, 29 Mar 2022 04:17:31 GMT (309kb,D)
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