Higgs-dependent Yukawa couplings

TL;DR

This paper explores a model where Yukawa couplings depend on the Higgs field, resulting in significant changes to Higgs decay patterns, flavor violation, and top quark decays, with implications testable at the LHC.

Contribution

It introduces a Higgs-dependent Yukawa coupling framework that explains fermion mass hierarchy and predicts observable phenomena at collider experiments.

Findings

Modified Higgs branching ratios

Enhanced flavor-violating processes

Observable top quark decay t-> hc

Abstract

We consider the possibility that the Yukawa couplings depend on the Higgs field, with the motivation of generating the fermion mass hierarchy through appropriate powers of the Higgs vacuum expectation value. This leads to drastic modifications of the Higgs branching ratios, new Higgs contributions to various flavor-violating processes, and observable rates for the top quark decay t-> hc. The underlying flavor dynamics must necessarily appear at the TeV scale and is within the reach of the LHC.