Minimal SU(5) Resuscitated by Higgs Coupling Fixed Points
Abstract
Description
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, $SU(3) \otimes SU(2) \otimes U(1)$ gauge couplings converge to a common point $\sim 2.65 \times 10^{15}$ GeV ($τ_p \sim 10^{34 \pm 1}$ 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.
13 pages, RevTex, 1 ps Figure (missing figure now included)
13 pages, RevTex, 1 ps Figure (missing figure now included)