Higgs Boson Yukawa Form Factors from Supersymmetric Radiative Fermion Masses

TL;DR

This paper explores how supersymmetric models with radiatively generated light fermion masses can alter Higgs-fermion couplings and potentially explain the muon g-2 anomaly, with implications for future collider measurements.

Contribution

It analyzes the Higgs-fermion Yukawa form factors in supersymmetric models where light fermion masses are radiatively generated, highlighting their impact on Higgs couplings and muon magnetic moments.

Findings

Radiative fermion mass models predict non-standard Higgs-fermion couplings.

Potential large contributions to the muon anomalous magnetic moment are possible.

Future collider experiments can test these deviations with high precision.

Abstract

The recent discovery of the Higgs-like resonance at $125\,\rm{GeV}$ has opened up new avenues in the search for beyond standard model physics. Hints of such extensions could manifest themselves as modifications in the Higgs-fermion couplings and other Higgs related observables. In this work, we study aspects of a class of models where the light fermion masses are radiatively generated. Specifically, we consider models where the light fermion masses, partially or completely, arise from chiral violation in the soft supersymmetry-breaking sector. In these models, the radiatively generated Higgs-fermion Yukawa form factors have non-trivial characteristics and will modify Higgs-fermion couplings from their standard model expectations. A radiatively generated fermion mass could also potentially contribute to large anomalous magnetic moments; this is particularly interesting in the case of the muon where a persistent discrepancy, at the level of around $3\,\sigma$, has existed between experiment and theory. Deviations in the Higgs-fermion couplings will eventually be probed to high accuracy in the near future, at the LHC and the planned ILC, to less than a percent. The prospect of a large, unknown contribution to the muon anomalous magnetic moment could be reaffirmed as well, in future experiments. All these reasons make it worthwhile to revisit models of radiatively generated fermion masses, and investigate some of their general characteristics in these contexts.