Direct search for right-handed neutrinos and neutrinoless double beta decay

被引:26
作者
Asaka, Takehiko [1 ]
Eijima, Shintaro [2 ]
机构
[1] Niigata Univ, Dept Phys, Niigata 9502181, Japan
[2] Niigata Univ, Grad Sch Sci & Technol, Niigata 9502181, Japan
来源
PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS | 2013年 / 2013卷 / 11期
关键词
DARK-MATTER; LEPTOGENESIS; BARYOGENESIS; NONCONSERVATION; ORIGIN; VMSM;
D O I
10.1093/ptep/ptt094
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We consider an extension of the Standard Model by two right-handed neutrinos, especially with masses lighter than the charged K meson. This simple model can realize the seesaw mechanism for neutrino masses and also baryogenesis by flavor oscillations of right-handed neutrinos. We summarize the constraints on right-handed neutrinos from direct searches as well as big bang nucleosynthesis. It is then found that the possible range for the quasi-degenerate mass of right-handed neutrinos is M-N >= 163 MeV for the normal hierarchy of neutrino masses, while M-N = 188-269 MeV and M-N >= 285 MeV for the inverted hierarchy case. Furthermore, we find in the latter case that the possible value of the Majorana phase is restricted for M-N = 188-350 MeV, which leads to the fact that the rate of neutrinoless double beta decay is also limited.
引用
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页数:10
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