标题： 用 tau 中微子照亮地球上的非常重的暗物质 显示英文标题

标题： Illuminating Very Heavy Dark Matter in the Earth with Tau Neutrinos

摘要： 暗物质在地球上积累，因为地球穿越银河系中的暗物质晕。通过间接探测暗物质湮灭为标准模型粒子的可能性可以进行研究。在可能的信使中，中微子因其能够逃离密集区域而独特理想。因此，具有大体积和广泛能量覆盖的中微子望远镜为从地球中心搜索暗物质信号提供了新的机会。然而，由于地球对超高能中微子变得不透明，此类研究被限制在低于$\sim$ PeV 的暗物质质量范围内。在本研究中，我们证明如果暗物质湮灭为τ中微子或τ轻子，运行在TeV-PeV能区的中微子望远镜可以探测到非常重的暗物质粒子。在这里，我们报告了使用7.5年IceCube高能起始事件观测数据得到的自旋无关暗物质-核子散射截面的上限，针对的是1$10^5$ GeV 和 1$10^{10}$ GeV之间的质量范围。我们的结果激励了对IceCube及其他即将在北半球运行的中微子望远镜进行详细分析。 显示英文摘要

摘要： Dark matter accumulates in the center of the Earth as the planet plows through the dark matter halo in the Milky Way. Possible annihilation of dark matter to Standard Model particles can be probed in indirect dark matter searches. Among possible messengers, neutrinos are uniquely ideal as they can escape dense regions. Therefore, neutrino telescopes, with their large volume and broad energy exposures, offer new opportunities to search for dark matter signals from the center of the Earth. However, such studies have been restricted to dark matter masses below $\sim$ PeV as the Earth becomes opaque to very-high-energy neutrinos. In this study, we demonstrate that neutrino telescopes operating at TeV-PeV energies can probe very heavy dark matter particles if they annihilate to tau neutrinos or tau leptons. Here, we report upper limits on the spin-independent dark matter-nucleon cross section for masses between $10^5$ GeV and $10^{10}$ GeV by using 7.5 years of IceCube high-energy starting event observations. Our results motivate detailed analyses in IceCube and other upcoming neutrino telescopes in the Northern Hemisphere.