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Electroweak Symmetry Breaking and Extra Dimensions

Hsin-Chia Cheng, Bogdan A. Dobrescu, Christopher T. Hill

hep-pharXiv:hep-ph/9912343

Abstract

Electroweak symmetry can be naturally broken by observed quark and gauge fields in various extra-dimensional configurations. No new fundamental fields are required below the quantum gravitational scale ( 10 - 100 TeV). We examine schemes in which the QCD gauge group alone, in compact extra dimensions, forms a composite Higgs doublet out of (t,b)L and a linear combination of the Kaluza-Klein modes of tR. The effective theory at low energies is the Standard Model. The top-quark mass is controlled by the number of active tR Kaluza-Klein modes below the string scale, and is in agreement with experiment.

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