While there is evidence for the existence of dark matter, its properties have yet to be discovered. Simultaneously, the nature of high-energy astrophysical neutrinos detected by IceCube remains unresolved. If dark matter and neutrinos are coupled to each other, they may exhibit a non-zero elastic scattering cross section. Such an interaction between an isotropic extragalactic neutrino flux and dark matter would be concentrated in the Galactic Centre, where the dark matter column density is greatest. This scattering would attenuate the flux of high-energy neutrinos, which could be observed in IceCube. Using the seven-year Medium Energy Starting Events, we perform an unbinned likelihood analysis, searching for a signal based on a possible dark matter-neutrino interaction scenario. We search for a suppression of the high-energy astrophysical neutrino flux in the direction of the Galactic Centre, and compare these constraints to complementary low-energy information from large scale structure surveys and the cosmic microwave background.

虽然有暗物质存在的证据，但其性质尚未被发现。同时，冰立方探测到的高能天体物理中微子的性质仍未得到解决。如果暗物质和中微子相互耦合，它们可能表现出非零弹性散射截面。各向同性的河外中微子通量和暗物质之间的这种相互作用将集中在暗物质柱密度最大的银河系中心。这种散射会减弱高能中微子的通量，这可以在冰立方中观察到。使用 7 年中等能量起始事件，我们执行未分类的似然分析，搜索基于可能的暗物质 - 中微子相互作用场景的信号。