New U(1) Gauge Extension of the Supersymmetric Standard Model

In extending the minimal standard model of quarks and leptons to include supersymmetry, the conservation of baryon and lepton numbers is no longer automatic. I show how the latter may be achieved with a new U(1) gauge symmetry and new supermultiplets at the TeV scale. Neutrino masses and a solution of the $\mu$ problem are essential features of this proposed extension.