Neutrino masses: hierarchy without hierarchy
High Energy Physics - Phenomenology
2007-05-23 v1
Abstract
A large hierarchy of the Dirac masses can result in a small hierarchy for the low energy masses of the active neutrinos. This can happen even if the Majorana masses of right-handed neutrinos are all equal. A realistic description of the observed neutrino masses and mixing can be obtained starting from a large hierarchy in the Dirac masses. A large mixing for solar neutrinos results from the neutrino sector. The small value of the MNS matrix element U_e3 is a natural consequence of the scheme. The masses of the two lighter neutrinos are related to the solar neutrino mixing angle: mu_1/mu_2 = tan^2 theta_sol.
Cite
@article{arxiv.hep-ph/0205234,
title = {Neutrino masses: hierarchy without hierarchy},
author = {M. Jezabek},
journal= {arXiv preprint arXiv:hep-ph/0205234},
year = {2007}
}
Comments
7 pages, no figures. Dedicated to Stefan Pokorski on his 60th birthday. To appear in Acta Physica Polonica B