125 GeV Higgs from a chiral-techniquark model

TL;DR

This paper investigates how four-fermion interactions in a strongly coupled gauge theory can significantly lower the mass of an isosinglet scalar resonance, potentially explaining the 125 GeV Higgs within a technicolor framework.

Contribution

It introduces a large-N analysis of a chiral-techniquark model including four-fermion interactions, showing these can reduce the scalar mass to the observed Higgs value.

Findings

Four-fermion interactions can substantially lower scalar resonance mass.

Large-N summation reveals potential reduction from TeV scale to 125 GeV.

Supports technicolor models as viable Higgs candidates.

Abstract

We consider the spin-zero spectrum of a strongly coupled gauge theory. In particular, we focus on the dynamical mass of the isosinglet scalar resonance in the presence of a four-fermion interaction external to the gauge dynamics. This is motivated by the extended technicolor framework for dynamical electroweak symmetry breaking. Applying the large-$N$ limit, we sum all the leading-order contributions, and find that the corrections to the mass of the isosinglet scalar resonance can be large, potentially reducing its value from ${\cal O}(1)$ TeV to the observed value of 125 GeV.