We study imposing the condition that the standard model effective Higgs potential should have two approximately degenerate vacua, such that the vacuum we live in is just barely metastable: the one in which we live has a vacuum expectation value of 246 GeV and the other one should have a vacuum expectation value of the order of the Planck scale. Alone borderline metastability gives, using the experimental top quark mass 173.1±4.6 GeV, the Higgs boson mass prediction 121.8±11 GeV. The requirement that the second minimum be at the Planck scale already gave the prediction 173±4 GeV for the top quark mass according to our 1995 paper.
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Froggatt et al. (2001) studied this question.
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