Lepton Flavour Violation in a radiative neutrino mass model with the asymmetric Yukawa structure

TL;DR

This paper introduces a simplified method to analyze lepton flavor violation in radiative neutrino mass models with asymmetric Yukawa matrices, exemplified by the Zee-Babu model, linking neutrino physics, flavor violation, and collider searches.

Contribution

It proposes a new prescription for analyzing the Yukawa structure in such models and applies it to the Zee-Babu model to explore its phenomenological implications.

Findings

The method clarifies the relationship between Yukawa matrices and neutrino masses.

Phenomenological analysis of the Zee-Babu model shows potential signals at colliders.

Constraints from lepton flavor violation are discussed in the context of the model.

Abstract

Though models with the radiative neutrino mass generation are phenomenologically attractive, the complicated relationship between the flavour structure of additional Yukawa matrices and the neutrino mass matrix sometimes is a barrier to explore the models. We introduce a simple prescription to analyze the relation in a class of models with the asymmetric Yukawa structure. We then apply the treatment to the Zee-Babu model as a concrete example of the class and discuss the phenomenological consequences of the model. The combined studies among the neutrino physics, the lepton flavour violation, and the search for the new particles at the collider experiments provide the anatomy of the Zee-Babu model.