First Observation of PeV-Energy Neutrinos with IceCube

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dc.contributor.author Santander, Marcos
dc.date.accessioned 2019-07-03T13:14:12Z
dc.date.available 2019-07-03T13:14:12Z
dc.date.issued 2013-07-08
dc.identifier.citation Aartsen, M.G., et al. (2013): First Observation of PeV-Energy Neutrinos with IceCube. Physical Review Letters, 111(2). DOI: http://dx.doi.org/10.1103/PhysRevLett.111.021103 en_US
dc.identifier.uri http://ir.ua.edu/handle/123456789/5884
dc.description.abstract We report on the observation of two neutrino-induced events which have an estimated deposited energy in the IceCube detector of 1.04±0.16 and 1.14±0.17  PeV, respectively, the highest neutrino energies observed so far. These events are consistent with fully contained particle showers induced by neutral-current νe,μ,τ (ν̅e,μ,τ) or charged-current νe (ν̅e) interactions within the IceCube detector. The events were discovered in a search for ultrahigh energy neutrinos using data corresponding to 615.9 days effective live time. The expected number of atmospheric background is 0.082±0.004(stat)+0.041−0.057(syst). The probability of observing two or more candidate events under the atmospheric background-only hypothesis is 2.9×10⁻³ (2.8σ) taking into account the uncertainty on the expected number of background events. These two events could be a first indication of an astrophysical neutrino flux; the moderate significance, however, does not permit a definitive conclusion at this time. en_US
dc.format.mimetype application/pdf en_US
dc.language English en_US
dc.subject Neutrino, muon, pion, and other elementary particles; cosmic rays en_US
dc.subject Neutrino, muon, pion, and other elementary particle detectors; cosmic ray detectors en_US
dc.subject Cosmic rays en_US
dc.title First Observation of PeV-Energy Neutrinos with IceCube en_US
dc.type text en_US


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