Electroweak observables in a general 5D background

Abstract

Warped extra dimensions provide a new playground to study electroweak brea-king and the nature of the higgs field. In this paper we reanalyze the electroweak observables in theories with one extra dimension and a completely general warp factor. We demonstrate that, regardless of the 5D background, SU(2)R is needed in order to avoid excessive contributions to the T parameter. For higgsless theories cancellations between different contributions to the S parameter are needed. © SISSA 2007.