Examining the Geometrical Model with Inverted Mass Hierarchy for Neutrinos

Details Examining the Geometrical Model with Inverted Mass Hierarchy for Neutrinos Examining the Geometrical Model with Inverted Mass Hierarchy for Neutrinos

2007-01-11

arxiv.org/abs/hep-ph/0701083v2

Phys.Rev.D75:096005,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 10 figures, a reference is added, minor change in introduction

Scientific paper

10.1103/PhysRevD.75.096005

The comprehensive analyses are presented in the model with the inverted mass hierarchy for neutrinos, which follows from a geometrical structure of a (1+5) dimensional space-time where two extra dimensions are compactified on the T^2/Z_3 orbifold. The model gives two large lepton flavor mixings due to the S3 structure in the (1+5) dimensional space-time. It also predicts the lightest neutrino mass as m_3=(1-50)\times 10^{-5}eV and the effective neutrino mass responsible for neutrinoless double beta decays as _{ee}\simeq 50 meV. The low energy CP violation, J_{CP} could be 0.02. On the other hand, the observed baryon asymmetry in the present universe is produced by the non-thermal leptogenesis, which works even at the reheating temperature TR=10^{4}-10^{6}GeV. The correlation between the baryon asymmetry and the low energy CP violation is examined in this model.

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