V,W and X in Technicolour Models
High Energy Physics - Phenomenology
2009-10-22 v1
Abstract
Light techni-fermions and pseudo Goldstone bosons that contribute to the electroweak radiative correction parameters V,W and X may relax the constraints on technicolour models from the experimental values of the parameters S and T. Order of magnitude estimates of the contributions to V,W and X from light techni-leptons are made when the the techni-neutrino has a small Dirac mass or a large Majorana mass. The contributions to V,W and X from pseudo Goldstone bosons are calculated in a gauged chiral Lagrangian. Estimates of V,W and X in one family technicolour models suggest that the upper bounds on S and T should be relaxed by between 0.1 and 1 depending upon the precise particle spectrum.
Cite
@article{arxiv.hep-ph/9311375,
title = {V,W and X in Technicolour Models},
author = {Nick Evans},
journal= {arXiv preprint arXiv:hep-ph/9311375},
year = {2009}
}
Comments
19 pages + 2 pages of ps figs, SWAT/16