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arXiv 1208.0834hep-ph
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抑制太阳中WIMP湮灭的一种新方法:MeV中微子

A novel way of constraining WIMPs annihilations in the Sun: MeV neutrinos

Nicolas Bernal, Justo Martin-Albo, Sergio Palomares-Ruiz

摘要:

积累在太阳中的暗物质粒子湮灭会产生高能中微子流,中微子望远镜和探测器探测的前景已经在文献中广泛讨论。然而,对于湮灭成标准模型粒子,也会有一个在MeV范围内的中微子通量,来自μ子和带正电的π子的静止衰变。这些低能中微子以前从未被考虑过,它们也为将太阳中的暗物质湮灭限制为e+e-、mu+mu-或轻夸克提供了可能性。在这里,我们进行了详细的分析,使用最近的超级神冈数据在几十兆电子伏的范围内设置限制的WIMP-核子散射截面为不同的湮灭通道和计算WIMP的蒸发率从太阳的散射截面的所有值在一个一致的方式。

英文摘要:

Annihilation of dark matter particles accumulated in the Sun would produce a flux of high-energy neutrinos whose prospects of detection in neutrino telescopes and detectors have been extensively discussed in the literature. However, for annihilations into Standard Model particles, there would also be a flux of neutrinos in the MeV range from the decays at rest of muons and positively charged pions. These low-energy neutrinos have never been considered before and they open the possibility to also constrain dark matter annihilation in the Sun into e+e-, mu+mu- or light quarks. Here we perform a detailed analysis using the recent Super-Kamiokande data in the few tens of MeV range to set limits on the WIMP-nucleon scattering cross section for different annihilation channels and computing the evaporation rate of WIMPs from the Sun for all values of the scattering cross section 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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