Viability of strongly-coupled scenarios with a light Higgs-like boson
Abstract
We present a one-loop calculation of the oblique S and T parameters within strongly-coupled models of electroweak symmetry breaking with a light Higgs-like boson. We use a general effective Lagrangian, implementing the chiral symmetry breaking SU(2)_L x SU(2)_R -> SU(2)_{L+R} with Goldstones, gauge bosons, the Higgs-like scalar and one multiplet of vector and axial-vector massive resonance states. Using a dispersive representation and imposing a proper ultraviolet behaviour, we obtain S and T at the next-to-leading order in terms of a few resonance parameters. The experimentally allowed range forces the vector and axial-vector states to be heavy, with masses above the TeV scale, and suggests that the Higgs-like scalar should have a WW coupling close to the Standard Model one. Our conclusions are generic and apply to more specific scenarios such as the minimal SO(5)/SO(4) composite Higgs model.
Keywords
Cite
@article{arxiv.1212.6769,
title = {Viability of strongly-coupled scenarios with a light Higgs-like boson},
author = {Antonio Pich and Ignasi Rosell and Juan Jose Sanz-Cillero},
journal= {arXiv preprint arXiv:1212.6769},
year = {2013}
}
Comments
4 pages, 3 figures