Sequentially loop supressed fermion masses from a unique discrete symmetry

TL;DR

This paper introduces a renormalizable sequential loop suppression mechanism using a discrete symmetry to generate the fermion mass hierarchy in the Standard Model, including neutrinos, through loop-level mass generation.

Contribution

It presents a novel systematic approach that employs a discrete symmetry and sequential soft breaking to produce fermion mass hierarchies at different loop levels.

Findings

Successfully generates fermion mass hierarchy via loop suppression.

Provides a radiative type-I seesaw mechanism for neutrino masses.

Demonstrates a unified framework for fermion mass generation.

Abstract

We propose a systematic and renormalizable sequential loop suppression mechanism to generate the hierarchy of the Standard Model fermion masses from one discrete symmetry. The discrete symmetry is sequentially softly broken in order to generate one-loop level masses for the bottom, charm, tau and muon leptons and two-loop level masses for the lightest Standard Model charged fermions. The tiny masses for the light active neutrinos are produced from radiative type-I seesaw mechanism, where the Dirac mass terms are effectively generated at two-loop level.