Electroweak symmetry breaking by extra dimensions

Abstract

Electroweak symmetry breaking may be naturally induced by the observed quark and gauge fields in extra dimensions without a fundamental Higgs field. We show that a composite Higgs doublet can arise as a bound state of $(t,b{)}_L$ and a linear combination of the Kaluza-Klein states of $t_R$, due to QCD in extra dimensions. The top quark mass depends on the number of active $t_R$ Kaluza-Klein modes, and is consistent with the experimental value.

Comments: 4 pages, LaTeX, talk presented at PASCOS99, Lake Tahoe, California