Back to the doublet-triplet splitting problem

R. Barbieri, G. Dvali, M. Moretti

    Research output: Contribution to journalArticlepeer-review


    Examples of supersymmetric grand unified models are explicitly illustrated, in which the Higgs doublets are identified, at the tree level, with the massless degrees of freedom describing an "accidental" degeneracy of the vacuum at the first stage of gauge symmetry breaking. This degeneracy occurs as a consequence either of the gauge symmetry or of a discrete exact symmetry. The effect of radiative corrections, which lift the vacuum degeneracy and break the SU (2) ⊗ U (1) group, is discussed, showing that the consistency of the theory, at low energy, only sets a rather weak and mt-dependent lower bound on the lightest Higgs mass, with no constraint on the top-quark itself.

    Original languageEnglish (US)
    Pages (from-to)137-142
    Number of pages6
    JournalPhysics Letters B
    Issue number1-2
    StatePublished - Aug 5 1993

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics


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