Radiative charged-lepton masses with more than one Higgs doublet

TL;DR

This paper explores how charged-lepton masses can be generated in multi-Higgs doublet models via renormalization group effects, showing quantum corrections can be comparable to tree-level values and discussing implications for models with right-handed neutrinos.

Contribution

It demonstrates a mechanism for charged-lepton mass generation in NHDMs through quantum corrections, with explicit examples and analysis of their significance.

Findings

Quantum corrections to Yukawa couplings can be as large as tree-level values.

Electron and muon masses can be generated via RG running in 2- and 3-Higgs-doublet models.

Implications for models with right-handed neutrinos are briefly discussed.

Abstract

We discuss how charged-lepton masses can be induced in multi-Higgs doublet models (NHDMs) through renormalization group running of Yukawa couplings. Examples of electron and muon mass generation are presented within scenarios with two- and three-Higgs-doublet models. We also show that quantum corrections to the Yukawa couplings can be naturally of the same order as the tree-level values. The impact of such corrections in NHDMs with right-handed neutrinos is briefly commented.