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arXiv 1105.4546hep-ph
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伴随SU中中微子质量和轻子生成的新解(5)

New Solution for Neutrino Masses and Leptogenesis in Adjoint SU(5)

Kristjan Kannike, Dmitry Zhuridov

摘要:

在可重正化伴随SU(5)理论的背景下,我们研究了通过轻子生成的重子生成和通过I型+III型跷跷板+单圈机制的中微子质量和混合的产生。一个轻中微子保持无质量,因为三个重的马约拉纳费米子ρ_0,ρ_3和ρ_8对中微子质量矩阵的贡献不是线性独立的。然而,这些重费米子都没有与中微子质量的产生解耦。这为成功的leptogenesis打开了一个新的参数空间范围,特别是允许中微子质量的倒置层次。

英文摘要:

We investigate baryogenesis via leptogenesis and generation of neutrino masses and mixings through the Type I plus Type III seesaw plus an one-loop mechanism in the context of Renormalizable Adjoint SU(5) theory. One light neutrino remains massless, because the contributions of three heavy Majorana fermions ρ_0, ρ_3 and ρ_8 to the neutrino mass matrix are not linearly independent. However none of these heavy fermions is decoupled from the generation of neutrino masses. This opens a new range in parameter space for successful leptogenesis, in particular, allows for inverted hierarchy of the neutrino masses.

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