Evidence for "sterile neutrino" dark matter?
Evidence for "sterile neutrino" dark matter?
复制标题
“惰性中微子”暗物质的证据？
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
P. Gondolo
中科院分区：
文献类型：
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作者：
P. Gondolo
我表明，也许可以解释目前的证据，即银晕的伽马射线发射是由于晕WIMP湮灭所致。不仅可以匹配晕发射的强度和空间模式，而且候选WIMP的遗迹密度也可以在宇宙学感兴趣的领域内。经过与模型无关的分析以了解合适候选者的性质后，我提出了一个工作模型：扩展希格斯扇区的模型中的一个不育中微子。两个例子表明，在模型参数空间中存在一个有趣的区域，在该区域满足目前的观测和实验约束，并且重现伽马射线发射。
I show that it may be possible to explain the present evidence for a gamma-ray emission from the galactic halo as due to halo WIMP annihilations. Not only the intensity and spatial pattern of the halo emission can be matched but also the relic density of the candidate WIMP can be in the cosmologically interesting domain. After a model-independent analysis to learn about the properties of a suitable candidate, I present a working model: a sterile neutrino in a model with an extended Higgs sector. Two examples indicate the existence of an interesting region in the model parameter space where present observational and experimental constraints are satisfied and the gamma-ray emission is reproduced.