Minimal flavour deconstruction
21 December 2023
High Energy Physics - Phenomenology
Presents two models with non-universal gauge groups broken at two high scales
Additional heavy vector bosons give mass to 2nd and 1st generation fermions
No unnaturally small Yukawa couplings needed to fit fermion masses
Lighter symmetry breaking scale could be ~10 TeV
Models extended to also explain neutrino masses
Minimal model for fermion mass hierarchies
This paper constructs two examples of gauge theories with non-universal flavor interactions that can explain the observed quark and lepton mass spectra without unnaturally small couplings. The models have additional heavy vector bosons at two high mass scales that sequentially break the non-universal gauge symmetries. The lighter scale, associated with the masses of the second generation fermions, may be as low as 10 TeV. Both models are extended to incorporate neutrino masses.
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