Dynamical Gauge Symmetry Breaking in $SU(3{)}_L\otimes U(1{)}_X$ Extension of the Standard Model

Abstract

We study the $SU(3{)}_L\otimes U(1{)}_X$ extension of the Standard model with a strong U(1) coupling. We argue that current experiments limit this coupling to be relatively large. The model is dynamically broken to the Standard $SU(2{)}_L\otimes U(1)$ model at the scale of a few TeV with all the extra gauge bosons and the exotic quarks acquiring masses much larger than the scale of electroweak symmetry breaking. Furthermore we find that the model leads to large dynamical mass of the top quark and hence also breaks the electroweak gauge symmetry. It therefore leads to large dynamical effects within the Standard model and can partially replace the Higgs interactions.

Comments: 4 pages, revtex, no figures; revised version predicting realistic mass spectrum