Minimal SU(5) Resuscitated by Higgs Coupling Fixed Points
P. Q. Hung
Abstract
The issue of gauge unification in the (non-supersymmetric) Standard Model is reinvestigated. It is found that with just an additional fourth generation of quarks and leptons, SU(3) SU(2) U(1) gauge couplings converge to a common point 2.65 × 1015 GeV (τp 1034 1 years) provided the Higgs boson has a mass of at least 210 GeV. The presence of ultraviolet fixed points for the Yukawa and Higgs quartic couplings is found to be the origin of such unification.
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