The S parameter for a light composite Higgs: a dispersion relation approach
Open Access
- 5 June 2013
- journal article
- Published by Springer Science and Business Media LLC in Journal of High Energy Physics
- Vol. 2013 (6), 1-22
- https://doi.org/10.1007/jhep06(2013)014
Abstract
We derive a dispersion relation for the S parameter in the SO(5)/SO(4) Minimal Composite Higgs model. This generalizes the Peskin-Takeuchi formula to the case when a light Higgs boson is present in the spectrum. Our result combines an IR effect due to the reduction in the Higgs boson couplings with a UV contribution from the strong sector. It also includes a finite matching term, achieving a very good relative accuracy O(m h /m ρ ). We apply our formula in several toy examples, modeling the UV spectral density via Vector Meson Dominance.Other Versions
This publication has 42 references indexed in Scilit:
- First Glimpses at Higgs’ faceJournal of High Energy Physics, 2012
- Is the resonance at 125 GeV the Higgs boson?Physics Letters B, 2012
- Higgs discovery: the beginning or the end of natural EWSB?Journal of High Energy Physics, 2012
- Global analysis of the Higgs candidate with mass ~ 125 GeVJournal of High Energy Physics, 2012
- The strongly-interacting light HiggsJournal of High Energy Physics, 2007
- The minimal composite Higgs modelNuclear Physics B, 2005
- Electroweak symmetry breaking after LEP1 and LEP2Nuclear Physics B, 2004
- Estimation of oblique electroweak correctionsPhysical Review D, 1992
- Composite Higgs scalarsPhysics Letters B, 1984
- SU(2) × U(1) breaking by vacuum misalignmentPhysics Letters B, 1984