Suppression of Proton Decay in the Missing-Partner Model for Supersymmetric SU(5) GUT
Abstract
The Peccei-Quinn symmetric extension of the missing-partner model in the supersymmetric SU(5) grand unified model is consistent with the observed stability of the proton, even in the large β region ( 50-60) expected from the Yukawa unification. Moreover, the SU(5) gauge coupling constant remains small enough for the perturbative description of GUT's below the gravitational scale.
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