Speaker
Description
The electron Yukawa coupling is among the smallest parameters in the Standard Model, making it highly sensitive to even the most modest new physics effects. A dedicated Higgs pole run at FCC-ee offers a potential avenue to directly measure this coupling, though with considerable experimental challenges. In this talk, I will explore the indirect phenomenological implications of modified lepton Yukawa couplings both from an EFT perspective and in terms of simplified UV models. I will map out which extensions of the Standard Model, along with their flavour structures, can enhance these couplings at tree or loop level without violating current constraints, and how to narrow in on flavoured operators and models with correlated future measurements.
