Suppression of proton decay in the missing-partner model for supersymmetric SU(5) GUT

We construct a missing-partner model for supersymmetric SU(5) GUT assuming the Peccei-Quinn symmetry, in which the SU(5) gauge coupling constant remains in the perturbative regime below the gravitational scale ∼ 2.4 × 10 18 GeV. The Peccei-Quinn symmetry suppresses the dangerous dimension-five opera...

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Bibliographic Details
Published inPhysics letters. B Vol. 342; no. 1; pp. 138 - 144
Main Authors Hisano, J., Moroi, T., Tobe, K., Yanagida, T.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.01.1995
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Summary:We construct a missing-partner model for supersymmetric SU(5) GUT assuming the Peccei-Quinn symmetry, in which the SU(5) gauge coupling constant remains in the perturbative regime below the gravitational scale ∼ 2.4 × 10 18 GeV. The Peccei-Quinn symmetry suppresses the dangerous dimension-five operators for the nucleon decay much below the limit from the present proton-decay experiments. We also stress that due to this suppression mechanism our model can accommodate even the large tan β H (∼ 60) scenario which has been recently suggested to explain the observed value of the m b m τ ratio.
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(94)01342-A