  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 sample, we perform an unbinned likelihood
analysis, searching for a signal based on a possible DM-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.
