Abstract
A solution of the doublet-triplet splitting problem in the supersymmetric SU(6) gauge theory is suggested. The ‘missing doublet’ multiplet - 175-plet of the SU(6) group as well as the custodial SU(2) cus global symmetry play crucial role for achieving the doublet-triplet hierarchy. Two examples in which the doublet-triplet splitting occurs naturally are presented.
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