Superstring Extension of the Standard Model and Gravitation

Abstract

Some of the four-dimensional Superstring solutions provide a consistent framework for a Supersymmetric Unification of all interactions including gravity. A class of them extends successfully the validity of the standard model up to the string scale $\mathcal{O}(10^{17})GeV$. We stress the importance of string corrections which are relevant for low energy $\mathcal{O}(1)TeV$ predictions of gauge and Yukawa couplings as well as the spectrum of the supersymmetric particles after supersymmetry breaking.

plain LATEX, no figures, 22 pages