Nonoblique Effects and Weak-Isospin Breaking from Extended Technicolor

Abstract

Several aspects of the flavor-diagonal extended technicolor (ETC) gauge boson are reviewed. Among them are an increase of $R_b$ that could explain the LEP $R_b$ excess, a sizable, positive correction to the $\tau$ asymmetry parameter $A_{\tau }$, and a contribution to the weak-isospin breaking $\rho$ parameter that is just barely acceptable by present data.

Talk given at the Top Quark Workshop, Iowa State University, May 25-26, 1995, 6 pages, use WSPRL.STY