Minimal U(1) two-Higgs-doublet models for quark and lepton flavour

• DOI: 10.48550/arxiv.2406.03331
• Publication Date: 2024-06-05
• Authors: J. R. Rocha; H. B. Câmara; R. González Felipe; F. R. Joaquim
• Keywords: Flavour

In the context of 2HDM, and assuming that neutrinos acquire masses via Weinberg operator, we perform a systematic analysis to determine minimal quark lepton flavour patterns, compatible with masses, mixing CP violation data, realisable by Abelian symmetries. We four models for quarks, where number independent parameters matches observables. For sector, three predictive are identified. Namely, find scenarios preference upper/lower octant $\theta_{23}$ atmospheric angle, exhibit lower bounds on lightest neutrino currently probed cosmology testable at future neutrinoless double beta decay experiments, even normally-ordered masses. investigate phenomenology each model taking into account all relevant theoretical, electroweak precision observables, scalar sector constraints, as well stringent processes such $\overline{B} \rightarrow X_s \gamma$, $B_s \mu^- \mu^+$ meson oscillations, charged flavour-violating decays $e_\alpha^{-} e_\beta^{-} e_\gamma^{+} e_\delta^{-}$ $e_\alpha e_\beta \gamma$. show that, in some cases, symmetries provide natural framework suppress flavour-changing neutral couplings lead featuring heavy neutral/charged below TeV scale within reach current experiments.