Supersymmetric Radiative Flavour

TL;DR

This paper explores how supersymmetric models can generate the Standard Model's flavor structure through radiative corrections, focusing on 2-loop effects and analyzing compatibility with experimental constraints.

Contribution

It introduces a novel mechanism for radiative Yukawa coupling generation via 2-loop vertex renormalisation in supersymmetric models and constructs models demonstrating this effect.

Findings

Radiative generation of Yukawa couplings is possible through 2-loop effects.

Models show tension with low-energy flavor constraints, except for Dirac neutrino masses.

The mechanism offers a new approach to flavor structure in supersymmetry.

Abstract

We examine possibilities for the radiative generation of the Yukawa couplings and flavour structure in supersymmetric models in the supersymmetric phase. Not withstanding the non-renormalisation of the Wilsonian superpotential, this can occur through the 2-loop vertex renormalisation of the physical 1PI couplings. We describe this effect and construct models in which this occurs. For models attempting to reproduce the full flavour structure of the Standard Model, we analyse the tension between such models and constraints from low-energy flavour observables. We note that the tension is weakest for the case of generating Dirac neutrino masses.