Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-04-18
Phys.Rev.D65:073009,2002
Physics
High Energy Physics
High Energy Physics - Phenomenology
16 pages, 4 figures
Scientific paper
10.1103/PhysRevD.65.073009
As an extension of our previous work in the seesaw mechanism, we analyze the influence of $U_{e3}$ on the properties (masses and mixing) of the RH Majorana neutrinos in three flavors. The quasidegenerate light neutrinos case is also considered. Assuming the hierarchical Dirac neutrino masses, we find the heavy Majorana neutrino mass spectrum is either hierarchical or partial degenerate if $\theta_{23}^{\nu}$ is large. We show that degenerate RH Majorana masses correspond to maximal RH mixing angle while hierarchical ones correspond to the RH mixing angles which scale linearly with the mass ratios of the Dirac neutrino masses. An interesting analogue with the behavior of the matter-enhanced neutrino conversion is also presented.
Cheng Guang
Pan Haijun
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