Electroweak symmetry breaking as a consequence of compact dimensions

Abstract

It has been shown recently that the Higgs doublet may be composite, with the left-handed top-bottom doublet and a new right-handed anti-quark as constituents bound by some four-quark operators with nonperturbative coefficients. I show that these operators are naturally induced if there are extra space dimensions with a compactification scale in the multi-TeV range. The Higgs compositness is due mainly to the Kaluza-Klein modes of the gluons, while flavor symmetry breaking may be provided by various fields propagating in the compact dimensions. I comment briefly on the embedding of this scenario in string theory.

Comments: 10 pages, latex. Two paragraphs, on the nature of the phase transition (page 4) and flavor symmetry breaking (page 5), are expanded