Gauge created top quark condensate and heavy top

TL;DR

This paper proposes a gauge theory-based approach to generate the scalar interaction in the top mode standard model, resulting in a heavy top quark while keeping other quarks massless, and extends the gauge symmetry to increase the top mass bound.

Contribution

It introduces a gauge extension to the top mode standard model that naturally produces a heavy top quark and relaxes the mass bound, reducing fine-tuning.

Findings

Top quark mass bound increased to ~270 GeV

Heavy top quark generated with gauge theory

Fine-tuning requirements are reduced

Abstract

The scalar interaction term of the top mode standard model can be generated by a gauge theory. It is emphasized that in this approach generalization to family space directly yields a heavy top quark while leaving all other quarks massless. By generating the new interaction from gauge extension to custodial $SU(2)$, the standard model bound $m_{top} \stackrel{<}{\sim} 200 GeV$ is pushed to $m_{top} \stackrel{<}{\sim} 270 GeV$, thereby significantly reducing the amount of finetuning required to match this number.