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      Low-luminosity gamma-ray bursts as the sources of ultrahigh-energy cosmic ray nuclei

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          Observations and implications of the ultrahigh-energy cosmic rays

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            The Origin of Ultra-High-Energy Cosmic Rays

             A. M. Hillas (1984)
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              Is Open Access

              Evidence for High-Energy Extraterrestrial Neutrinos at the IceCube Detector

              We report on results of an all-sky search for high-energy neutrino events interacting within the IceCube neutrino detector conducted between May 2010 and May 2012. The search follows up on the previous detection of two PeV neutrino events, with improved sensitivity and extended energy coverage down to approximately 30 TeV. Twenty-six additional events were observed, substantially more than expected from atmospheric backgrounds. Combined, both searches reject a purely atmospheric origin for the twenty-eight events at the \(4\sigma\) level. These twenty-eight events, which include the highest energy neutrinos ever observed, have flavors, directions, and energies inconsistent with those expected from the atmospheric muon and neutrino backgrounds. These properties are, however, consistent with generic predictions for an additional component of extraterrestrial origin.
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                Author and article information

                Journal
                PRVDAQ
                Physical Review D
                Phys. Rev. D
                American Physical Society (APS)
                2470-0010
                2470-0029
                April 2018
                April 23 2018
                : 97
                : 8
                10.1103/PhysRevD.97.083010
                © 2018

                https://link.aps.org/licenses/aps-default-license

                https://link.aps.org/licenses/aps-default-accepted-manuscript-license

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