Systematic U(1)_{B-L} Extensions of Loop-Induced Neutrino Mass Models with Dark Matter

TL;DR

This paper classifies U(1)_{B-L} extended models for neutrino masses and dark matter, showing how gauge symmetry remnants ensure dark matter stability and proposing collider tests for these models.

Contribution

It provides a systematic classification of one-loop Z_2 and two-loop Z_3 neutrino mass models with gauged U(1)_{B-L} symmetry, including their gauge symmetry breaking patterns.

Findings

Complete list of one-loop Z_2 neutrino mass models.

Complete list of two-loop Z_3 neutrino mass models.

Proposed collider signatures for gauge boson widths.

Abstract

We study the gauged U(1)_{B-L} extensions of the models for neutrino masses and dark matter. In this class of models, tiny neutrino masses are radiatively induced through the loop diagrams, while the origin of the dark matter stability is guaranteed by the remnant of the gauge symmetry. Depending on how the lepton number is violated in the neutrino mass diagrams, these models are systematically classified. We present a complete list for the one-loop Z_2 and the two-loop Z_3 neutrino mass models as examples of the classification. These underlying gauge symmetries and its breaking patterns can be probed at future high energy colliders by looking at the width of the new gauge boson.