An N=2 SUSY gauge model for dynamical breaking of the grand unified SU(5) symmetry

We construct an extension of the recently proposed dynamical model for the breaking of SU(5)_{\rm GUT} gauge symmetry, in which a pair of massless chiral supermultiplets for Higgs doublets are naturally obtained. We point out that a model at a specific point in the parameter space of superpotential is regarded as a low-energy effective theory of an N=2 supersymmetric gauge model for the strongly interacting hypercolor sector