PoS - Proceedings of Science
Volume 301 - 35th International Cosmic Ray Conference (ICRC2017) - Session Neutrino. NU-astrophysical neutrinos
Measurement of High Energy Neutrino–Nucleon Cross Section and Astrophysical Neutrino Flux Anisotropy Study of Cascade Channel with IceCube
Y. Xu* on behalf of the IceCube Collaboration
*corresponding author
Full text: pdf
Pre-published on: August 16, 2017
Published on: August 03, 2018
Abstract
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.
DOI: https://doi.org/10.22323/1.301.0978
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