Powerful Yukawas

TL;DR

This paper proposes a novel class of models where light fermion masses arise from higher-dimensional operators, leading to enhanced Higgs couplings to light fermions, with a UV completion based on collective symmetry breaking.

Contribution

It introduces the concept of Powerful Yukawas with a UV-complete framework using Sprouted Symmetry Breaking, advancing the understanding of fermion mass generation.

Findings

Enhanced Higgs couplings to light fermions predicted

A new UV-complete model with collective symmetry breaking

Potential implications for Higgs phenomenology

Abstract

We introduce a class of models where the masses of the light Standard Model fermions are due to an Effective Field Theory operator that appears beyond dimension-4 in the power counting expansion, resulting in a `Powerful Yukawa'. The effective Yukawa coupling structure is UV-completed using a collective symmetry breaking pattern in the flavour sector, which we dub `Sprouted Symmetry Breaking.' The irreducible signature is an enhanced Higgs coupling to the light Standard Model fermions.