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arXiv 1105.2073hep-phastro-ph.COastro-ph.GA
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暗原子:不对称性与直接探测

Dark Atoms: Asymmetry and Direct Detection

David E. Kaplan, Gordan Z. Krnjaic, Keith R. Rehermann, Christopher M. Wells

摘要:

我们提出了一个简单的原子暗物质(aDM)的紫外完成,其中重右手中微子衰变诱导暗和轻子数密度。这个模型解决了几个突出的宇宙学问题:物质/反物质不对称性,暗物质丰度,早期宇宙中光自由度的数量,以及小尺度结构的平滑。此外,这种aDM的实现可以使CoGeNT过量与最近公布的空结果相一致,并预测CRESST氧带中的信号。我们还发现,由于未屏蔽的长程相互作用,剩余的未重组的暗离子沉降到一个弥漫的等温晕。

英文摘要:

We present a simple UV completion of Atomic Dark Matter (aDM) in which heavy right-handed neutrinos decay to induce both dark and lepton number densities. This model addresses several outstanding cosmological problems: the matter/anti-matter asymmetry, the dark matter abundance, the number of light degrees of freedom in the early universe, and the smoothing of small-scale structure. Additionally, this realization of aDM may reconcile the CoGeNT excess with recently published null results and predicts a signal in the CRESST Oxygen band. We also find that, due to unscreened long-range interactions, the residual un recombined dark ions settle into a diffuse isothermal halo.

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