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PreprintarXiv licencearXiv

Minimal Flavoured DFSZ Axion Models: Predictive Yukawa Textures and Flavour Constraints

  • Peter Cox
  • Maaz Hayat
  • Raymond R. Volkas
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Abstract

We study a predictive class of flavoured DFSZ axion models in which the Peccei--Quinn symmetry is fully horizontal and the domain wall number is unity. These Minimal F-DFSZ models simultaneously resolve the strong CP problem and avoid the post-inflationary domain wall problem, while enforcing a predictive set of texture-zero quark mass matrices. Remarkably, the entire quark Yukawa sector can be reconstructed in terms of the measured quark masses and Cabibbo--Kobayashi--Maskawa parameters. We derive analytic expressions for the resulting flavour-violating Higgs and axion couplings, thereby making explicit how the new-physics effects are determined by Standard Model observables. We then analyse the full flavour phenomenology of the framework and obtain bounds on the scale of new physics from precision flavour observables.

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Cite

BibTeXRIS
BibTeX
@misc{cox2026minimal,
  title = {{Minimal Flavoured DFSZ Axion Models: Predictive Yukawa Textures and Flavour Constraints}},
  author = {Peter Cox and Maaz Hayat and Raymond R. Volkas},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.12635},
  eprint = {2609.12635},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.12635},
}
RIS
TY  - UNPB
TI  - Minimal Flavoured DFSZ Axion Models: Predictive Yukawa Textures and Flavour Constraints
AU  - Peter Cox
AU  - Maaz Hayat
AU  - Raymond R. Volkas
PY  - 2026
DA  - 2026/09/11
PB  - arXiv
DO  - 10.48550/arxiv.2609.12635
UR  - https://arxiv.org/abs/2609.12635
AB  - We study a predictive class of flavoured DFSZ axion models in which the Peccei--Quinn symmetry is fully horizontal and the domain wall number is unity. These Minimal F-DFSZ models simultaneously resolve the strong CP problem and avoid the post-inflationary domain wall problem, while enforcing a predictive set of texture-zero quark mass matrices. Remarkably, the entire quark Yukawa sector can be reconstructed in terms of the measured quark masses and Cabibbo--Kobayashi--Maskawa parameters. We derive analytic expressions for the resulting flavour-violating Higgs and axion couplings, thereby making explicit how the new-physics effects are determined by Standard Model observables. We then analyse the full flavour phenomenology of the framework and obtain bounds on the scale of new physics from precision flavour observables.
ER  -