Froggatt-Nielsen hierarchy and the neutrino mass matrix
High Energy Physics - Phenomenology
2008-05-12 v1
Abstract
We study the neutrino mass matrix derived from the seesaw mechanism in which the neutrino Yukawa couplings and the heavy Majorana neutrino mass matrix are controlled by the Froggatt-Nielsen mechanism. In order to obtain the large neutrino mixings, two Froggatt-Nielsen fields are introduced with a complex vacuum expectation values. As a by-product, CP violation is systematically induced even if the order one couplings of FN fields are real. We show several predictions of this model, such as theta_{13}, the Dirac CP phase, two Majorana CP phases, the effective mass of the neutrinoless double beta decay and the leptogenesis. The prediction of the branching ratio of mu to e+gamma is also given in SUSY model.
Keywords
Cite
@article{arxiv.0805.1338,
title = {Froggatt-Nielsen hierarchy and the neutrino mass matrix},
author = {Hiroshi Kamikado and Tetsuo Shindou and Eiichi Takasugi},
journal= {arXiv preprint arXiv:0805.1338},
year = {2008}
}
Comments
17 pages, 1 figure