$T_7$ Flavor Model in Three Loop Seesaw and Higgs Phenomenology

TL;DR

This paper introduces a novel radiative neutrino mass model combining three-loop and tree-level mechanisms, utilizing a $T_7$ flavor symmetry to align with experimental data and predict collider signatures.

Contribution

It presents a new three-loop radiative seesaw model with $T_7$ flavor symmetry that avoids universal Higgs-lepton couplings and is consistent with current collider data.

Findings

Model successfully explains neutrino masses and mixings.

Predicts multi-muon events as a collider signature.

Compatible with current LHC constraints.

Abstract

We propose a new type of radiative seesaw model in which observed neutrino masses are generated through a three-loop level diagram in combination with tree-level type-II seesaw mechanism in a renormalizable theory. We introduce a Non-abelian flavor symmetry $T_7$ in order to constrain the form of Yukawa interactions and Higgs potential. Although several models based on a Non-abelian flavor symmetry predict the universal coupling constants among the standard model like Higgs boson and charged leptons, which is disfavored by the current LHC data, our model can avoid such a situation. We show a benchmark parameter set that is consistent with the current experimental data, and we discuss multi-muon events as a key collider signature to probe our model.