Precision Experiments, Grand Unification, and Compositeness

Abstract

Precision electroweak data allow one to test the standard model, constrain its parameters, and search for the effects of some kinds of new physics. The results of the most recent data from LEP, SLC, and elsewhere are described, as are their predictions for $m_t$, $M_H$, and $α_s$. The implications for the two major classes of extensions of the standard model, supersymmetry/unification and compositeness, are described.

Invited talk presented at {\it SUSY-95}, Palaiseau, France, May 1995. 19 pages, Latex, 6 figures, not included; postscript file with embedded figures by anonymous ftp at ftp://dept.physics.upenn.edu/pub/Langacker/paris.ps