Bounds on neutrino masses from leptogenesis in type-II see-saw models

Details Bounds on neutrino masses from leptogenesis in type-II see-saw models Bounds on neutrino masses from leptogenesis in type-II see-saw models

2004-06-05

arxiv.org/abs/hep-ph/0406065v3

Phys.Rev. D71 (2005) 013006

Physics

High Energy Physics

High Energy Physics - Phenomenology

minor typos corrected, references added, match with published version

Scientific paper

10.1103/PhysRevD.71.013006

The presence of the triplet $\Delta_{L}$ in left-right symmetric theories leads to type-II see-saw mechanism for the neutrino masses. In these models, assuming a normal mass hierarchy for the heavy Majorana neutrinos, we derive a lower bound on the mass of the lightest of heavy Majorana neutrino from the leptogenesis constraint. From this bound we establish a consistent picture for the hierarchy of heavy Majorana neutrinos in a class of left right symmetric models in which we identify the neutrino Dirac mass matrix with that of Fritzsch type charged lepton mass matrix. It is shown that these values are compatible with the current neutrino oscillation data.

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