Axion-Higgs Unification

Abstract

In theories with no fundamental scalars, one gauge group can become strong at a large scale Lambda and spontaneously break a global symmetry, producing the Higgs and the axion as composite pseudo-Nambu-Goldstone bosons. We show how KSVZ and DFSZ axion models can be naturally realised. The assumption Lambda around 10^{11} GeV is phenomenologically favoured because: a) The axion solves the QCD theta problem and provides the observed DM abundance; b) The observed Higgs mass is generated via RGE effects from a small Higgs quartic coupling at the compositeness scale, provided that the Higgs mass term is fine-tuned to be of electroweak size; c) Lepton, quark as well as neutrino masses can be obtained from four-fermion operators at the compositeness scale. d) The extra fermions can unify the gauge couplings.

19 pages. Refs. added and eq. 3.6 fixed

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Cited by in corpus (13)

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• Composite Accidental Axions
• The Higgs mass from a String-Theoretic Perspective
• The Minimal Flavour Violating Axion
• A Composite Higgs with a Heavy Composite Axion
• Implications of Higgs Discovery for the Strong CP Problem and Unification
• Dark Matter, Dark Radiation and Gravitational Waves from Mirror Higgs Parity
• WIMPs and Un-Naturalness
• A Common Source for Scalars: Axiflavon-Higgs Unification
• Sterile Neutrino Dark Matter and Leptogenesis in Left-Right Higgs Parity
• The Minimal Axion Minimal Linear $\sigma$ Model
• Dark Matter Detection, Standard Model Parameters, and Intermediate Scale Supersymmetry