Gauged Lepton Symmetry Model

TL;DR

This paper explores a gauged lepton number symmetry model where neutrino masses are generated at two-loop level, introducing exotic leptons that also serve as dark matter candidates, with testable predictions at future colliders.

Contribution

It presents a novel two-loop neutrino mass generation mechanism within a gauged lepton symmetry framework, including anomaly cancellation and dark matter implications.

Findings

Neutrino masses generated at two-loop level.

Existence of a dark matter candidate among exotic leptons.

Testable predictions for $Z'$ boson at ILC.

Abstract

We study a model with $U(1)$ gauged lepton number symmetry in which the active neutrino masses are generated at two-loop level through the spontaneous breaking of the lepton number symmetry. To cancel gauge anomalies some exotic leptons are introduced that also play an important role in generating neutrino masses and the lightest neutral one can be a dark matter candidate. We discuss a phenomenology of the neutral fermion sector including dark matter, lepton flavor violations, and an extra neutral gauge boson $Z'$ that can be tested by $e^+ e^-$ collision at the International Linear Collider (ILC).