A 125 GeV composite Higgs boson versus flavour and electroweak precision tests
Abstract
A composite Higgs boson of 125 GeV mass, only mildly fine-tuned, requires top partners with a semi-perturbative coupling and a mass not greater than about a TeV. We analyze the strong constraints on such picture arising from flavour and electroweak precision tests in models of partial compositeness. We consider different representations for the composite fermions and compare the case of an anarchic flavour structure to models with a U(3)^3 and U(2)^3 flavour symmetry. Although non trivially, some models emerge that look capable of accommodating a 125 GeV Higgs boson with top partners in an interesting mass range for discovery at the LHC as well as associated flavour signals.
Keywords
Cite
@article{arxiv.1211.5085,
title = {A 125 GeV composite Higgs boson versus flavour and electroweak precision tests},
author = {Riccardo Barbieri and Dario Buttazzo and Filippo Sala and David M. Straub and Andrea Tesi},
journal= {arXiv preprint arXiv:1211.5085},
year = {2015}
}
Comments
28 pages, 12 tables. v2: clarifications and references added, discussion in appendix E extended, numerical glitches in tables 4 and 8 corrected, conclusions unchanged