Common source for scalars: Flavored axion-Higgs unification

We propose a unified model of scalar particles that addresses the flavor hierarchies, solves the strong CP problem, delivers a dark matter candidate, and provides the trigger for electroweak symmetry breaking. Besides furnishing a unification of the recently proposed axiflavon with a Goldstone-Higgs...

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Bibliographic Details
Published in:Physical review. D 2019-01, Vol.99 (1), p.015028, Article 015028
Main Authors: Alanne, Tommi, Blasi, Simone, Goertz, Florian
Format: Article
Language:English
Subjects:
Broken symmetry
Dark matter
Decay
Flavor (particle physics)
Hierarchies
Neutrinos
Scalars
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Summary:We propose a unified model of scalar particles that addresses the flavor hierarchies, solves the strong CP problem, delivers a dark matter candidate, and provides the trigger for electroweak symmetry breaking. Besides furnishing a unification of the recently proposed axiflavon with a Goldstone-Higgs sector, the scenario can also be seen as adding a model of flavor (and strong CP conservation along with axion dark matter) to elementary Goldstone-Higgs setups. In particular, we derive bounds on the axion decay constant from the need to generate a Standard-Model-like Higgs potential at low energies, which we confront with constraints from flavor physics. In the minimal implementation, we find that the axion decay constant is restricted to a thin stripe of fa ≈ (1011–1012) GeV, while adding right-handed neutrinos allows to realize a heavy-axion model at lower energies, down to fa ∼ 10 TeV.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.99.015028