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We present a novel analysis method and performance studies to determine the neutrino-nucleon deep-inelastic scattering cross section at high energies. The analysis uses atmospheric and extraterrestrial neutrino-induced electromagnetic and hadronic showers (cascades) in the TeV-PeV energy range, and assumes that the extraterrestrial neutrino flux is isotropic. Signal samples are separated into two groups, "down-going" (from the Southern Hemisphere) and "up-going" (from the Northern Hemisphere). Since up-going events may interact and be absorbed by the Earth while down-going event rate remains unaffected, the ratio of down-going events and up-going events for certain energy range is correlated with the cross section value. At the energies in this study, the yields are sensitive to the neutrino-nucleon cross section and nucleon structure in a region of kinematic overlap with HERA and with the LHC.We present the method for the neutrino-nucleon cross section measurement in the TeV-PeV energy range using neutrino induced cascades with the complete IceCube detector. In addition, we will test the hypothesis of a North-South anisotropy in astrophysical neutrino flux, assuming the knowledge of the neutrino-nucleon cross section from the electroweak physics.

Measurement of High Energy Neutrino–Nucleon Cross Section and Astrophysical Neutrino Flux Anisotropy Study of Cascade Channel with IceCube