Higgs and Top quark coupled with a conformal gauge sector

TL;DR

This paper introduces a new beyond-standard-model scenario where a conformal gauge sector suppresses the Higgs mass correction and Yukawa couplings, predicting a heavy Higgs around 500 GeV while remaining consistent with precision measurements.

Contribution

It proposes a dynamical model with a conformal gauge sector that naturally suppresses Higgs mass corrections and Yukawa couplings, providing a novel mechanism for electroweak symmetry breaking.

Findings

Predicts a Higgs mass of about 500 GeV.

Shows compatibility with electroweak precision data.

Provides an explicit consistent model.

Abstract

We propose a dynamical scenario beyond the standard model, in which the radiative correction to the Higgs mass parameter is suppressed due to a large anomalous dimension induced through a conformal invariant coupling with an extra gauge sector. Then the anomalous dimension also suppresses the Yukawa couplings of the Higgs field. However, the large top Yukawa coupling can be generated effectively through mixing among top quarks and the fermions of the conformal gauge sector. This scenario is found to predict a fairly heavy Higgs mass of about 500 GeV. We present an explicit model and show consistency with the Electro-Weak precision measurements of the S and T parameters as well as the Z boson decay width.