Dark Matter from Split Seesaw
Dark Matter from Split Seesaw
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DOI：
10.1016/j.physletb.2010.08.031
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发表时间：
2010-06
影响因子：
4.4
通讯作者：
A. Kusenko;F. Takahashi;T. Yanagida
中科院分区：
文献类型：
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作者：
A. Kusenko;F. Takahashi;T. Yanagida
具有额外维度的模型中的跷跷板机制被证明与大范围的马约拉纳质量大体一致。由此产生的尺度民主意味着，跷跷板机制可以自然地解释任意小的右旋中微子质量的中微子质量之小。如果跷跷板参数的尺度被分开，两个右手中微子处于高尺度，一个处于keV尺度，就可以解释宇宙的物质-反物质不对称性以及暗物质。暗物质候选者是质量为几 keV 的无菌右手中微子，可以解释观测到的脉冲星速度以及钱德拉 X 射线天文台的最新数据，这些数据表明存在 5 keV 的无菌右手中微子。
The seesaw mechanism in models with extra dimensions is shown to be generically consistent with a broad range of Majorana masses. The resulting democracy of scales implies that the seesaw mechanism can naturally explain the smallness of neutrino masses for an arbitrarily small right-handed neutrino mass. If the scales of the seesaw parameters are split, with two right-handed neutrinos at a high scale and one at a keV scale, one can explain the matter–antimatter asymmetry of the universe, as well as dark matter. The dark matter candidate, a sterile right-handed neutrino with mass of several keV, can account for the observed pulsar velocities and for the recent data from Chandra X-ray Observatory, which suggest the existence of a 5 keV sterile right-handed neutrino.