Technicolor Theories with Negative S
High Energy Physics - Phenomenology
2009-09-15 v2
Abstract
We show that the pseudo Nambu--Goldstone boson contribution to the Peskin--Takeuchi electroweak parameter can be negative in a class of technicolor theories. This negative contribution can be large enough to cancel the positive techni-hadron contribution, showing that electroweak precision tests alone cannot be used to rule out technicolor as the mechanism of electroweak symmetry breaking.
Cite
@article{arxiv.hep-ph/9209255,
title = {Technicolor Theories with Negative S},
author = {Markus A. Luty and Raman Sundrum},
journal= {arXiv preprint arXiv:hep-ph/9209255},
year = {2009}
}
Comments
(LBL-32893, UCB-PTH 92/34, 10 pages; we added a discussion of uncertainties, fine-tuning, and SU(2) asymptotic freedom; the conclusions are unchanged.)