Key points are not available for this paper at this time.
Upper limits on the mass m₅ of a fermion in the Glashow-Weinberg-Salam model were previously found by requiring that our vacuum be an absolute minimum of the one-loop Higgs potential; for a Higgs-boson mass m₇150 GeV, it was found that m₅100 GeV. We note that including the effect of running couplings in the one-loop term enlarges the range of allowed masses based on this constraint. Requiring only that the universe arrive in our vacuum and stay there for over 10^10 yr further increases this bound to m₅200 GeV.
Flores et al. (Fri,) studied this question.