An Ultraviolet Chiral Theory of the Top for the Fundamental Composite (Goldstone) Higgs

TL;DR

This paper proposes a new ultraviolet-complete chiral gauge theory that explains the top quark mass and predicts novel fractionally charged fermions, advancing the understanding of composite Higgs models without scalars.

Contribution

It introduces a scalar-less, anomaly-free chiral gauge theory as a UV completion for composite Higgs models, with mechanisms for top mass generation and bottom mass suppression.

Findings

Predicts new fractionally charged fermions

Identifies four-fermion operators relevant for top mass

Suggests distinctive phenomenology for new states

Abstract

We introduce a scalar-less anomaly free chiral gauge theory that serves as natural ultraviolet completion of models of fundamental composite (Goldstone) Higgs dynamics. The new theory is able to generate the top mass and furthermore features a built-in protection mechanism that naturally suppresses the bottom mass. At low energies the theory predicts new fractionally charged fermions, and a number of four-fermion operators that, besides being relevant for the generation of the top mass, also lead to an intriguing phenomenology for the new states predicted by the theory.