Towards a Realistic Model of Higgsless Electroweak Symmetry Breaking

We present a 5D gauge theory in warped space based on a bulk $\mathrm{SU}(2{)}_L\times \mathrm{SU}(2{)}_R\times \mathrm{U}(1{)}_{B-L}$ gauge group where the gauge symmetry is broken by boundary conditions. The symmetry breaking pattern and the mass spectrum resemble that in the standard model (SM). To leading order in the warp factor the $\rho$ parameter and the coupling of the $Z$ ($S$ parameter) are as in the SM, while corrections are expected at the level of a percent. From the anti–de Sitter (AdS) conformal field theory point of view the model presented here can be viewed as the AdS dual of a (walking) technicolorlike theory, in the sense that it is the presence of the IR brane itself that breaks electroweak symmetry, and not a localized Higgs on the IR brane (which should be interpreted as a composite Higgs model). This model predicts the lightest $W$, $Z$, and $\gamma$ resonances to be at around 1.2 TeV, and no fundamental (or composite) Higgs particles.