Sterile Neutrinos and B-L Symmetry
Abstract
We revisit the relation between the neutrino masses and the spontaneous breaking of the B-L gauge symmetry. We discuss the main scenarios for Dirac and Majorana neutrinos and point out two simple mechanisms for neutrino masses. In this context the neutrino masses can be generated either at tree level or at quantum level and one predicts the existence of very light sterile neutrinos with masses below the eV scale. The predictions for lepton number violating processes such as mu to e and mu to e gamma are discussed in detail. The impact from the cosmological constraints on the effective number of relativistic degree of freedom is investigated.
Keywords
Cite
@article{arxiv.1708.02247,
title = {Sterile Neutrinos and B-L Symmetry},
author = {Pavel Fileviez Perez and Clara Murgui},
journal= {arXiv preprint arXiv:1708.02247},
year = {2018}
}
Comments
v2 new section for the LFV processes, minor corrections, main conclusion unchanged, version to appear in Physics Letters B