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Classification of three-family flavoured DFSZ axion models that have no domain wall problem

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arxiv 2310.16348 v2 pith:LHQRCNTG submitted 2023-10-25 hep-ph

Peter Cox , Matthew J. Dolan , Maaz Hayat , Andrea Thamm , Raymond R. Volkas This is my paper · ORCID
classification hep-ph
keywords dfszflavourmodelsproblemaxionclassificationdomainthree-family
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We provide an exhaustive classification of three-family DFSZ axion models that have no cosmological domain wall problem. This result is obtained by making the Peccei-Quinn symmetry flavour dependent in certain specific ways, thus reinforcing a possible connection between the strong CP problem and the flavour puzzle. Known DFSZ flavour variants such as the top-specific model emerge as special cases. Key features of the phenomenology of these models are briefly discussed.

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  1. Using $\Delta N_{\rm eff}$ to constrain preferred axion model dark matter

    hep-ph 2024-11 conditional novelty 6.0 of 10

    In preferred axion models with slow heavy-quark decays, axions produced after decoupling form dark radiation that can exceed Planck's ΔNeff bound, excluding much of the parameter space of models D and E.

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