Abstract
We investigate the properties of a class of supersymmetric SO(10) grand unified models with an intermediate mass scale M/sub R/ corresponding to the breaking of left-right symmetry. We consider the possibility that the supersymmetry-breaking scale M/sub S/ coincides with M/sub R/ and study the constraints imposed on the value of M/sub R/ by low-energy parameters such as sin/sup 2/theta(M/sub W/) and ..cap alpha../sub strong/(M/sub W/) for different plausible scenarios for the mass spectrum of the supermultiplet fields. We find that the allowed values of M/sub R/ are greater than 10/sup 10/ GeV. If, however, the supersymmetry-breaking scale M/sub S/>M/sub R/ and M/sub S/ is chosen as a free parameter, lower intermediate mass scales are possible. Some implications of our model are noted.
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