Oblique Corrections from Higgsless Models in Warped Space

We calculate the tree-level oblique corrections to electroweak precision observables generated in higgless models of electroweak symmetry breaking with a 5D SU(2)L×SU(2)R ×U(1)B−L gauge group on a warped background. In the absence of brane induced kinetic terms (and equal left and right gauge couplings) we find the S parameter to be ∼ 1.15, while T ∼ U ∼ 0, as in technicolor theories. Planck brane induced kinetic terms and unequal left-right couplings can lower S, however for sufficiently low values of S tree-level unitarity will be lost. A kinetic term localized on the TeV brane for SU(2)D will generically increase S, however an induced kinetic term for U(1)B−L on the TeV brane will lower S. With an appropriate choice of the value of this induced kinetic term S ∼ 0 can be achieved. In this case the mass of the lowest Z′ mode will be lowered to about 300 GeV.