Multi-Component Dark Matter Systems and Their Observation Prospects
Multi-Component Dark Matter Systems and Their Observation Prospects
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DOI：
10.1103/physrevd.86.076015
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发表时间：
2012-07
影响因子：
5
通讯作者：
M. Aoki;M. Duerr;J. Kubo;H. Takano
中科院分区：
文献类型：
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作者：
M. Aoki;M. Duerr;J. Kubo;H. Takano
在三分量暗物质系统中，除了标准的暗物质湮灭之外，还考虑了暗物质粒子的转换和半湮灭。我们发现DM的残余丰度对这些非标准DM湮灭过程非常敏感，这是最近发现的双组分DM系统。为了考虑一个三分量DM系统的具体模型，我们在Ma的辐射跷跷板模型中加入一个Majorana费米子chi和一个真实的标量玻色子phi，得到一个Z2\times Z '2 DM稳定对称性，其中DM粒子是惰性的Higgs玻色子chi和phi.它示出了如何允许的参数空间，以前获得的\chi和\phi的情况下，变化。这个模型中的半湮灭过程产生单色中微子。本文估计了冰立方对这些来自太阳的单色中微子的观测率。来自太阳的高能单色中微子的观测可能表明一个多组分DM系统。
Conversions and semi-annihilations of dark matter (DM) particles in addition to the standard DM annihilations are considered in a three-component DM system. We find that the relic abundance of DM can be very sensitive to these non-standard DM annihilation processes, which has been recently found for two-component DM systems. To consider a concrete model of a three-component DM system, we extend the radiative seesaw model of Ma by adding a Majorana fermion \chi and a real scalar boson \phi, to obtain a Z_2 \times Z'_2 DM stabilizing symmetry, where we assume that the DM particles are the inert Higgs boson, \chi and \phi. It is shown how the allowed parameter space, obtained previously in the absence of \chi and \phi, changes. The semi-annihilation process in this model produces monochromatic neutrinos. The observation rate of these monochromatic neutrinos from the Sun at IceCube is estimated. Observations of high energy monochromatic neutrinos from the Sun may indicate a multi-component DM system.