A Lepton-specific Universal Seesaw Model with Left-Right Symmetry

TL;DR

This paper introduces a left-right symmetric model with a universal seesaw mechanism, generating Standard Model fermion masses via heavy vector-like fermions, and predicts lepton-specific collider signatures.

Contribution

It develops a novel lepton-specific universal seesaw framework with a softly broken Z2 symmetry, leading to unique collider signatures not previously explored.

Findings

Predicts lepton-specific collider signatures at LHC and future colliders.

Provides a mechanism for fermion mass generation via heavy vector-like fermions.

Introduces a softly broken Z2 symmetry distinguishing lepton and quark sectors.

Abstract

We propose a left-right symmetric framework with universal seesaw mechanism for the generation of masses of the Standard Model quarks and leptons. Heavy vector-like singlet quarks and leptons are required for generation of Standard Model-like quark and lepton masses through seesaw mechanism. A softly broken $Z_2$ symmetry distinguishes the lepton sector and the quark sector of the model. This leads to the presence of some lepton-specific interactions that can produce unique collider signatures which can be explored at the current Large Hadron Collider run and also future colliders.