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arXiv 0901.1750hep-ph
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来自惰性双重暗物质的中微子

Neutrinos from Inert Doublet Dark Matter

Sarah Andreas, Michel H. G. Tytgat, Quentin Swillens

摘要:

本文在惰性双态模型及其扩展的框架下,研究了地球、太阳和银河系中心WIMP暗物质湮灭过程中产生的中微子的特征。我们认为一个暗物质的候选人,我们采取的是一个额外的希格斯双重的中性成分之一,在三个不同的质量范围内,这都已被证明是一致的WMAP丰度和直接检测实验排除限制。具体来说,我们考虑一个质量在4到8 GeV之间的轻WIMP(低),一个质量在60-70 GeV左右的WIMP(中)和一个质量超过500 GeV的重WIMP(高)。在第一种情况下,我们表明,在太阳捕获可能会受到限制,使用超级神冈数据。在最后两种情况下,我们认为,通过中微子间接检测是具有挑战性的,但并不完全排除。对于中等质量,我们试图充分利用所谓的“铁共振”的接近性,这可能会增强地球对暗物质候选者的捕获。如果引入轻的右手马约拉纳中微子,来自地球的信号会进一步增强,在这种情况下,标量暗物质候选者可能会湮灭成单能中微子对。在高质量的情况下,如果暗物质的丰度大大增加,从银河系中心探测中微子是可能的。

英文摘要:

We investigate the signatures of neutrinos produced in the annihilation of WIMP dark matter in the Earth, the Sun and at the Galactic centre within the framework of the Inert Doublet Model and extensions. We consider a dark matter candidate, that we take to be one of the neutral components of an extra Higgs doublet, in three distinct mass ranges, which have all been shown previously to be consistent with both WMAP abundance and direct detection experiments exclusion limits. Specifically, we consider a light WIMP with mass between 4 and 8 GeV (low), a WIMP with mass around 60-70 GeV (middle) and a heavy WIMP with mass above 500 GeV (high). In the first case, we show that capture in the Sun may be constrained using Super-Kamiokande data. In the last two cases, we argue that indirect detection through neutrinos is challenging but not altogether excluded. For middle masses, we try to make the most benefit of the proximity of the so-called 'iron resonance' that might enhance the capture of the dark matter candidate by the Earth. The signal from the Earth is further enhanced if light right-handed Majorana neutrinos are introduced, in which case the scalar dark matter candidate may annihilate into pairs of mono-energetic neutrinos. In the case of high masses, detection of neutrinos from the Galactic centre might be possible, provided the dark matter abundance 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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