Flavorful two-Higgs-doublet models with a twist
Flavorful two-Higgs-doublet models with a twist
We explore two-Higgs-doublet models with nonstandard flavor structures. In analogy to the four well-studied models with natural flavor conservation (type 1, type 2, lepton-specific, and flipped), we identify four models that preserve an approximate $U(2{)}^{5}$ flavor symmetry acting on the first two generations. In all four models, the couplings of …