Neutrino Mass Matrix with Two Zeros and Leptogenesis

Details Neutrino Mass Matrix with Two Zeros and Leptogenesis Neutrino Mass Matrix with Two Zeros and Leptogenesis

2002-10-10

arxiv.org/abs/hep-ph/0210155v2

Phys.Lett. B551 (2003) 127-136

Physics

High Energy Physics

High Energy Physics - Phenomenology

A few small corrections, references are added

Scientific paper

10.1016/S0370-2693(02)03012-5

The leptogenesis is studied in the neutrino mass matrix with two zeros, which reduces the number of independent phases of the CP violation. These texture zeros are decomposed into the Dirac neutrino mass matrix and the right-handed Majorana one in the see-saw mechanism. It is found that there are six textures for the Dirac neutrino mass matrix, among which one texture with three zeros has three phases, three textures with four zeros have two phases, and two textures with five zeros have only one phase in the basis with the real right-handed Majorana mass matrix. The relation between the leptogenesis and the low energy CP violation is discussed in typical textures. It is remarked that the leptogenesis is linked strongly with the CP violation in the neutrino oscillations. The predicted baryon asymmetry of the universe is consistent with the observed value.

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