Standard Model Vacua in Heterotic M-Theory

Abstract

We present a class of N=1 supersymmetric ``standard'' models of particle physics, derived directly from heterotic M-theory, that contain three families of chiral quarks and leptons coupled to the gauge group SU(3)_C X SU(2)_L X U(1)_Y. These models are a fundamental form of ``brane world'' theories, with an observable and hidden sector each confined, after compactification on a Calabi--Yau threefold, to a BPS three-brane separated by a higher dimensional bulk space with size of the order of the intermediate scale. The requirement of three families, coupled to the fundamental conditions of anomaly freedom and supersymmetry, constrains these models to contain additional five-branes located in the bulk space and wrapped around holomorphic curves in the Calabi--Yau threefold.

10 pages, Latex file, no figures. Talk given at STRINGS'99, Potsdam, Germany, July 19-24, 1999

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