Higgs Multiplets of the Quark-Lepton Family Group
M.A. Ajaib, S.M. Barr

TL;DR
This paper demonstrates that realistic models with non-abelian family group Higgs multiplets can successfully fit quark and lepton masses and mixing angles, while constraining flavor-changing interactions with few parameters.
Contribution
It introduces models where the Standard Model Higgs is part of a non-trivial multiplet of a non-abelian family group, providing a new approach to flavor physics.
Findings
Successfully fits quark and lepton masses and mixing angles.
Determines flavor-changing operator coefficients with few parameters.
Shows consistency of models with observed particle properties.
Abstract
It is shown that realistic models can be constructed in which the Standard Model Higgs field is in a non-trivial multiplet of a non-abelian family group of the quarks and leptons. It is shown that the observed quark and lepton masses and mixing angles can be fit, while the coefficients of flavor-changing four-fermion operators mediated by the extra Higgs doublets are determined in terms of only a few unknown parameters.
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