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Evidence for High-Energy Extraterrestrial Neutrinos at the IceCube Detector
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
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2013 (English)In: Science, ISSN 0036-8075, E-ISSN 1095-9203, Vol. 342, no 6161, 947-+ p.Article in journal (Refereed) Published
Abstract [en]

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 about 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 28 events at the 4 sigma level. These 28 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.

Place, publisher, year, edition, pages
2013. Vol. 342, no 6161, 947-+ p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-98083DOI: 10.1126/science.1242856ISI: 000327223500034OAI: oai:DiVA.org:su-98083DiVA: diva2:682511
Funder
Swedish Research CouncilKnut and Alice Wallenberg Foundation
Note

AuthorCount:277;

Available from: 2013-12-27 Created: 2013-12-27 Last updated: 2017-12-06Bibliographically approved

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Bohm, ChristianDanninger, MatthiasFinley, ChadFlis, SamuelHulth, Per-OlofHultqvist, KlasWalck, ChristianWolf, MartinZoll, Marcel
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