Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-09-09
Phys.Rev.D82:103012,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
submitted to Physical Review D
Scientific paper
10.1103/PhysRevD.82.103012
A search for extremely high energy cosmic neutrinos has been carried out with the IceCube Neutrino Observatory. The main signals in the search are neutrino-induced energetic charged leptons and their rate depends on the neutrino-nucleon cross section. The upper-limit on the neutrino flux has implications for possible new physics beyond the standard model such as the extra space-time dimension scenarios which lead to a cross section much higher than the standard particle physics prediction. In this study we constrain the neutrino-nucleon cross section at energies beyond $10^9$ GeV with the IceCube observation. The constraints are obtained as a function of the extraterrestrial neutrino flux in the relevant energy range, which accounts for the astrophysical uncertainty of neutrino production models.
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