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https://hdl.handle.net/2440/79920
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Type: | Journal article |
Title: | First observation of PeV-energy neutrinos with IceCube |
Author: | Aartsen, M. Hill, G. |
Citation: | Physical Review Letters, 2013; 111(2):1-7 |
Publisher: | American Physical Soc |
Issue Date: | 2013 |
ISSN: | 0031-9007 1079-7114 |
Statement of Responsibility: | M. G. Aartsen ... G. C. Hill ... et al. (IceCube Collaboration) |
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 ν(e,μ,τ) (ν̅ (e,μ,τ)) or charged-current ν(e) (ν̅ e) 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)₋₀.₀₅₇⁺⁰.⁰⁴¹ (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. |
Keywords: | IceCube Collaboration |
Rights: | © 2013 American Physical Society |
DOI: | 10.1103/PhysRevLett.111.021103 |
Grant ID: | ARC |
Published version: | http://dx.doi.org/10.1103/physrevlett.111.021103 |
Appears in Collections: | Aurora harvest Chemistry and Physics publications |
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