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arXiv 1107.3182astro-ph.HE
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利用中微子光谱信息增强对太阳中暗物质自湮灭的灵敏度

Enhanced Sensitivity to Dark Matter Self-annihilations in the Sun using Neutrino Spectral Information

Carsten Rott, Takayuki Tanaka, Yoshitaka Itow

摘要:

被太阳引力捕获的自湮灭暗物质可以在当前和下一代中微子探测器上产生可观测的中微子信号。通过利用这些信号,中微子探测器可以探测太阳中弱相互作用大质量粒子(WIMP)与核子的自旋相关散射。我们描述了一种方法,如何将中微子通量的限制转换为对WIMP-核子散射截面的限制。在这种方法中,所有的中微子味都可以用非常相似的方式处理。我们研究了中微子望远镜对太阳WIMP信号的灵敏度,发现这种探测通道在寻找低质量WIMP中特别重要。我们通过应用基本的光谱选择标准,获得了具有高度竞争力的灵敏度与所有中微子味通道的兆吨级探测器。最好的结果与电子中微子通道。我们讨论了相关的不确定性,并提供了一个程序,如何对待他们的分析一致的方式。

英文摘要:

Self-annihilating dark matter gravitationally captured by the Sun could yield observable neutrino signals at current and next generation neutrino detectors. By exploiting such signals, neutrino detectors can probe the spin-dependent scattering of weakly interacting massive particles (WIMPs) with nucleons in the Sun. We describe a method how to convert constraints on neutrino fluxes to a limit on the WIMP-nucleon scattering cross section. In this method all neutrino flavors can be treated in a very similar way. We study the sensitivity of neutrino telescopes for Solar WIMP signals using vertex contained events and find that this detection channel is of particular importance in the search for low mass WIMPs. We obtain highly competitive sensitivities with all neutrino flavor channels for a Megaton sized detector through the application of basic spectral selection criteria. Best results are obtained with the electron neutrino channel. We discuss associated uncertainties and provide a procedure how to treat them for analyses in a consistent way.

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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