We present a massive Majorana neutrino model and see how it is constrained from the solar and atmospheric neutrino deficit experiments. This model incorporates the seesaw mechanism and Peccei-Quinn symmetry. Its consequence to the neutrinoless double beta decay is also discussed.
@article{arxiv.hep-ph/9702253,
title = {Mass Matrix of Majorana Neutrinos},
author = {T. Fukuyama and H. Nishiura},
journal= {arXiv preprint arXiv:hep-ph/9702253},
year = {2007}
}