Back to the doublet-triplet splitting problem

R. Barbieri, G. Dvali, M. Moretti

    Research output: Contribution to journalArticle

    Abstract

    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, Section B: Nuclear, Elementary Particle and High-Energy Physics
    Volume312
    Issue number1-2
    DOIs
    StatePublished - Aug 5 1993

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    vacuum
    symmetry
    broken symmetry
    degrees of freedom
    quarks
    energy

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    Cite this

    Back to the doublet-triplet splitting problem. / Barbieri, R.; Dvali, G.; Moretti, M.

    In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 312, No. 1-2, 05.08.1993, p. 137-142.

    Research output: Contribution to journalArticle

    Barbieri, R. ; Dvali, G. ; Moretti, M. / Back to the doublet-triplet splitting problem. In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 1993 ; Vol. 312, No. 1-2. pp. 137-142.
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