A composite light scalar, electro-weak symmetry breaking and the recent LHC searches

TL;DR

This paper presents a holographic model of electroweak symmetry breaking driven by a strongly coupled sector, predicting a spectrum of light and heavy resonances consistent with current LHC constraints.

Contribution

It introduces a five-dimensional holographic model for electroweak symmetry breaking with a light dilaton and detailed resonance spectrum analysis.

Findings

Identifies parameter regions compatible with precision electroweak tests.

Predicts a spectrum with light states and a tower of resonances up to 2-3 TeV.

Provides insights into LHC search prospects for new resonances.

Abstract

We construct a model in which electro-weak symmetry breaking is induced by a strongly coupled sector, which is described in terms of a five-dimensional model in the spirit of the bottom-up approach to holography. We compute the precision electro-weak parameters, and identify regions of parameter space allowed by indirect tests. We compute the spectrum of scalar and vector resonances, which contains a set of parametrically light states that can be identified with the electroweak gauge bosons and a light dilaton. There is then a little desert, up to 2-3 TeV, where towers of resonances of the vector, axial-vector and scalar particles appear.