Anomaly-free Abelian gauge symmetries with Dirac seesaws
Abstract
We perform a systematic analysis of Standard Model extensions with an additional anomaly-free gauge symmetry, to generate tree-level Dirac neutrino masses. An anomaly-free symmetry demands nontrivial conditions on the charges of the unavoidable new states. An intensive scan was performed, looking for solutions generating neutrino masses by the type-I and type-II tree-level Dirac seesaw mechanism, via operators with dimension 5 and 6, that correspond to active or dark symmetries. Special attention was paid to the cases featuring no extra massless chiral fermions or multicomponent dark matter with unconditional stability.
Keywords
Cite
@article{arxiv.2108.05907,
title = {Anomaly-free Abelian gauge symmetries with Dirac seesaws},
author = {Nicolás Bernal and Diego Restrepo},
journal= {arXiv preprint arXiv:2108.05907},
year = {2022}
}
Comments
13+3 pages, 2 figures. V2: Typos corrected. Matches version accepted for publication in EPJC. arXiv admin note: substantial text overlap with arXiv:2102.06211