Renormalization Group Constraints in Two-higgs Theories*
نویسنده
چکیده
We use the SU(3) x SU(2) x U(1) renormalization group equations to constrain fermion masses and charged-scalar couplings in two-Higgs grand unified theories. We find upper bounds on the sum of all quark (or lepton) masses and show that the Cabibbo mixings of heavy quarks tend to be small. We bound the vacuum expectation values of the Higgs fields, and use these limits to place strong restrictions on the couplings of the charged Higgs scalar.
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