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Suppression of Proton Decay in the Missing-Partner Model for Supersymmetric SU(5) GUT

J. Hisano·T. Moroi·K. Tobe·T. Yanagida
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Abstract

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 $\sim2.4\times 10^{18}\GEV$. 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 $\tanβ_H$ ($\sim$ 60) scenario which has been recently suggested to explain the observed value of the $m_b/m_τ$ ratio.

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J. Hisano, T. Moroi, K. Tobe, T. Yanagida. 1994-06-29. Suppression of Proton Decay in the Missing-Partner Model for Supersymmetric SU(5) GUT. https://doi.org/10.1016/0370-2693(94)01342-a

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