Oblique Corrections from Higgsless Models in Warped Space
Abstract
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 x SU(2)_R x 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.
Cite
@article{arxiv.hep-ph/0401160,
title = {Oblique Corrections from Higgsless Models in Warped Space},
author = {Giacomo Cacciapaglia and Csaba Csaki and Christophe Grojean and John Terning},
journal= {arXiv preprint arXiv:hep-ph/0401160},
year = {2010}
}
Comments
18 pages, LaTeX, 2 figures included