Probing new physics signals with symmetry-restored Yukawa textures.

We implement a symmetry violation guideline into a two-Higgs-doublet model embedded with three right-handed neutrinos, and exploit the generic Yukawa structures of the model via a hypothetical symmetry restoration of a global U Q (1) 3 × U L (1) 3 symmetry. We then apply a mass-powered parametrization to construct the phenomenologically motivated Yukawa interactions, which enables us to incorporate correlatively the neutrino mass, dark matter, as well as the lepton-flavor universality violations in R K (∗) and R D (∗) . Specifically, two atmospheric-scale neutrino masses are generated by a low-scale seesaw mechanism, while the much lighter one, being of O (10 - 6) eV , is fixed by a 7.1 keV sterile neutrino dark matter produced primordially by the freeze-in mechanism. On the other hand, the neutrino and the charged-lepton mass hierarchies encoded in the mass-powered textures can naturally account for the R K (∗) and the R D (∗) anomalies, respectively. As a further application, a milder discrepancy of the muon g - 2 is observed, which has also been implied by the recently refined lattice results. [ABSTRACT FROM AUTHOR]