We systematically study the minimal supersymmetric Pati-Salam theory, paying special attention to the unification constraints. We find that the SU(4)c scale Mc and the left-right scale MR lie in the range 10¹⁰GeV<Mc<10¹⁴GeV, 10³GeV<MR<10¹⁰GeV (with single-step breaking at 10¹⁰GeV), giving a potentially accessible scale of parity breaking. The theory includes the possibility of having doubly charged supermultiplets at the supersymmetry breaking scale, color octet states with a mass ~MR²/Mc, magnetic monopoles of intermediate mass that do not conflict with cosmology, and a ``clean'' (type I) form for the seesaw mechanism of the neutrino mass.
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Melfo et al. (2003) studied this question.
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