First observation of PeV-energy neutrinos with IceCube
| dc.contributor.author | Aartsen, M. | |
| dc.contributor.author | Hill, G. | |
| dc.date.issued | 2013 | |
| 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 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. | |
| dc.description.statementofresponsibility | M. G. Aartsen ... G. C. Hill ... et al. (IceCube Collaboration) | |
| dc.identifier.citation | Physical Review Letters, 2013; 111(2):1-7 | |
| dc.identifier.doi | 10.1103/PhysRevLett.111.021103 | |
| dc.identifier.issn | 0031-9007 | |
| dc.identifier.issn | 1079-7114 | |
| dc.identifier.uri | http://hdl.handle.net/2440/79920 | |
| dc.language.iso | en | |
| dc.publisher | American Physical Soc | |
| dc.relation.grant | ARC | |
| dc.rights | © 2013 American Physical Society | |
| dc.source.uri | https://doi.org/10.1103/physrevlett.111.021103 | |
| dc.subject | IceCube Collaboration | |
| dc.title | First observation of PeV-energy neutrinos with IceCube | |
| dc.type | Journal article | |
| pubs.publication-status | Published |