We construct the minimal left-right symmetric model by utilizing only the fields dictated by supersymmetry and automatic R-parity conservation. Allowing for nonrenormalizable operators in the superpotential, we show that parity can be spontaneously broken while preserving electromagnetic gauge invariance. The scale of parity breakdown is predicted in the intermediate region $M_R>{10}^{10}–{10}^{11}\mathrm{GeV},$ and R-parity remains exact. The theory contains a number of charged and doubly charged Higgs scalars with a low mass of order $M_R^2{/M}_{\mathrm{Planck}},$ accessible to experiment.

• Received 28 July 1997

DOI:https://doi.org/10.1103/PhysRevD.57.4174