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arXiv 0911.0540hep-ph
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惰性双重暗物质的中微子特征

Neutrino signature of Inert Doublet Dark Matter

Sarah Andreas

摘要:

在惰性双重模型及其推广的框架下,给出了地球、太阳和银河系中心暗物质湮灭产生的中微子的特征。该模型包含一个额外的希格斯双重态,其中一个中性成分被选为暗物质候选者。有三个不同的质量范围,可以获得与WMAP丰度和直接搜索的一致性:低(4 - 8 GeV),中(60 - 70 GeV)和高(500 - 1500 GeV)WIMP质量范围。第一种情况是有趣的,因为我们表明,该模型可以在同一时间给出正确的WMAP丰度和帐户的积极DAMA结果,而不矛盾的其他直接搜索。我们提出了如何在太阳捕获可以进一步限制这种情况下使用超级神冈数据。通过中微子的间接探测对于中等和高质量范围是具有挑战性的。对于前者,所谓的“铁共振”的存在引起了更大的中微子通量的WIMP质量约60 - 70 GeV,因为地球的捕获增强。在模型的粒子内容中加入轻右手马约拉纳中微子进一步增加了信号,因为它打开了一个直接湮灭通道进入单能量中微子。如果银河系中心的暗物质密度大幅提高,那么来自银河系中心的中微子可能会被检测到,成为重WIMP。

英文摘要:

In the framework of the Inert Doublet Model and extensions, the signature of neutrinos from dark matter annihilation in the Earth, the Sun and at the Galactic centre is presented. The model contains an extra Higgs doublet, a neutral component of which is chosen as dark matter candidate. There are three distinct mass ranges for which consistency both with WMAP abundance and direct searches can be obtained: a low (4 - 8 GeV), a middle (60 - 70 GeV) and a high (500 - 1500 GeV) WIMP mass range. The first case is of interest as we showed that the model can at the same time give the correct WMAP abundance and account for the positive DAMA results without contradicting other direct searches. We present how capture in the Sun can further constrain this scenario using Super-Kamiokande data. Indirect detection through neutrinos is challenging for the middle and high mass ranges. For the former, the presence of the so-called 'iron resonance' gives rise to larger neutrino fluxes for WIMP masses around 60 - 70 GeV since capture by the Earth is enhanced. The addition of light right-handed Majorana neutrinos to the particle content of the model further increases the signal since it opens a direct annihilation channel into mono-energetic neutrinos. Neutrinos from the Galactic centre might be detected for heavy WIMPs if the dark matter density at the Galactic centre is substantially boosted.

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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