标题： 使用IceCube大气中微子进行更新的地球层析成像 显示英文标题

标题： Updated Earth Tomography Using Atmospheric Neutrinos at IceCube

摘要： 冰立方中微子观测站在过去11年中，从地平线以下的所有方向观察到了一个高纯度的主要为大气的μ子中微子事件样本，能量范围覆盖500 GeV到100 TeV。 虽然这个样本最初用于eV量级的惰性中微子搜索，但其纯度和覆盖的参数空间也可用于进行地球断层扫描。 这些中微子通量穿过地球，并根据事件的能量和穿过的柱密度以不同的程度被衰减。 通过将地球参数化为多个恒定密度的壳层，冰立方可以测量上升中微子通量作为赤纬的函数，从而推断每个壳层的密度。 在本次报告中，展示了该分析的最新灵敏度以及与之前测量结果的比较。 此外，还解释了分析过程、数据样本的细节以及系统效应。 该分析是最新的一次由弱力驱动的非引力地球密度和质量测量。 显示英文摘要

摘要： The IceCube Neutrino Observatory has observed a sample of high purity, primarily atmospheric, muon neutrino events over 11 years from all directions below the horizon, spanning the energy range 500 GeV to 100 TeV. While this sample was initially used for an eV-scale sterile neutrino search, its purity and spanned parameter space can also be used to perform an earth tomography. This flux of neutrinos traverses the earth and is attenuated in varying amounts depending on the energy and traversed column density of the event. By parameterizing the earth as multiple constant--density shells, IceCube can measure the upgoing neutrino flux as a function of the declination, yielding an inference of the density of each shell. In this talk, the latest sensitivities of this analysis and comparisons with the previous measurement are presented. In addition, the analysis procedure, details about the data sample, and systematic effects are also explained. This analysis is one of the latest, weak-force driven, non-gravitational, measurements of the earth's density and mass.