Type II seesaw models with modular $A_4$ symmetry
Abstract
We discuss type-II seesaw models adopting modular symmetry in supersymmetric framework. In our approach, the models are classified by the assignment of representations and modular weights for leptons and triplet Higgs fields. Then neutrino mass matrix is characterized by modulus and two free parameters. Carrying out numerical analysis, we find allowed parameter sets which can fit the neutrino oscillation data. For the allowed parameter sets, we obtain the predictions in neutrino sector such as CP violating phases and the lightest neutrino mass. Finally we also show the predictions for the branching ratios of doubly charged scalar boson focusing on the case where the doubly charged scalar boson dominantly decays into charged leptons.
Cite
@article{arxiv.1912.00637,
title = {Type II seesaw models with modular $A_4$ symmetry},
author = {Tatsuo Kobayashi and Takaaki Nomura and Takashi Shimomura},
journal= {arXiv preprint arXiv:1912.00637},
year = {2020}
}
Comments
33pages, 16 figures, new figures added, some figures replaced and major revision in text to the reflect changes