Implications of supersymmetric SO(10) grand unification

We investigate the properties of a class of supersymmetric SO(10) grand unified models with an intermediate mass scale

M_{R}

corresponding to the breaking of left-right symmetry. We consider the possibility that the supersymmetry-breaking scale

M_{S}

coincides with

M_{R}

and study the constraints imposed on the value of

M_{R}

by low-energy parameters such as

{sin}^{2} θ (M_{W})

and

α_{strong} (M_{W})

for different plausible scenarios for the mass spectrum of the supermultiplet fields. We find that the allowed values of

M_{R}

are greater than

10^{10}

GeV. If, however, the supersymmetry-breaking scale

M_{S} > M_{R}

and

M_{S}

is chosen as a free parameter, lower intermediate mass scales are possible. Some implications of our model are noted.

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