title: R parity from the heterotic string.
abstract: In T-duality invariant effective supergravity with gaugino condensation as the mechanism for supersymmetry breaking, there is a residual discrete symmetry that could play the role of R parity in supersymmetric extensions of the standard model.
authors.affiliation: Department of Physics, University of California, Berkeley, California 94720, USA.
authors.forename: Mary K
authors.initials: MK
authors.lastname: Gaillard