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arXiv 1409.6311hep-phastro-ph.CO
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无菌中微子暗物质和3.5 keV生产线的生产

Production of Sterile Neutrino Dark Matter and the 3.5 keV line

Alexander Merle, Aurel Schneider

摘要:

最近观测到的一条能量为3.5 keV的X射线线主要来自星系团,这引发了一场关于我们是否可能看到了暗物质信号的讨论。如果得到证实,这个信号可能来自一个质量为7.1 keV的衰变无菌中微子。这样的粒子可以构成所有的暗物质,但尚不清楚它是如何在早期宇宙中产生的。在这封信中,我们表明,这是可能的区别不同的生产机制与当今的天文数据。最严格的限制来自莱曼-α森林,似乎不赞成所有的,但在文献中提出的主要产生机制之一,这是通过衰变的重标量单态的生产。确定产生机制将有助于确定X射线信号是否确实包含暗物质的间接探测。

英文摘要:

The recent observation of an X-ray line at an energy of 3.5 keV mainly from galaxy clusters has initiated a discussion about whether we may have seen a possible dark matter signal. If confirmed, this signal could stem from a decaying sterile neutrino of a mass of 7.1 keV. Such a particle could make up all the dark matter, but it is not clear how it was produced in the early Universe. In this letter we show that it is possible to discriminate between different production mechanisms with present-day astronomical data. The most stringent constraint comes from the Lyman-α forest and seems to disfavor all but one of the main production mechanisms proposed in the literature, which is the production via decay of heavy scalar singlets. Pinning down the production mechanism will help to decide whether the X-ray signal indeed comprises an indirect detection of dark matter.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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