Ema Yohei, Sala Filippo, Sato Ryosuke
DESY, Notkestraße 85, D-22607 Hamburg, Germany.
KEK Theory Center, Tsukuba 305-0801, Japan.
Phys Rev Lett. 2019 May 10;122(18):181802. doi: 10.1103/PhysRevLett.122.181802.
Sub-GeV dark matter particles up-scattered by cosmic rays gain enough kinetic energy to pass the thresholds of large volume detectors on Earth. We then use public Super-Kamiokande and MiniBooNE data to derive a novel limit on the scattering cross section of dark matter with electrons that extends down to sub-keV masses, closing a previously allowed wide region of parameter space. We finally discuss search strategies and prospects at existing and planned neutrino facilities.
被宇宙射线向上散射的亚GeV暗物质粒子获得足够的动能，从而能够越过地球上大型探测器的阈值。然后，我们利用公开的超级神冈探测器和MiniBooNE数据，得出暗物质与电子散射截面的新限制，该限制延伸到亚keV质量，填补了之前允许的一个广阔参数空间区域。我们最后讨论了现有和计划中的中微子设施的搜索策略和前景。
