Journal article
Evidence for High-Energy Extraterrestrial Neutrinos at the IceCube Detector
- Abstract:
- 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.
- Publication status:
- Published
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Authors
- Journal:
- Science More from this journal
- Volume:
- 342
- Issue:
- 6161
- Pages:
- 1242856
- Publication date:
- 2013-11-20
- DOI:
- EISSN:
-
1095-9203
- ISSN:
-
0036-8075
- Keywords:
- Pubs id:
-
pubs:440460
- UUID:
-
uuid:c434a7c8-1a86-4074-81b0-7b0f92704d12
- Local pid:
-
pubs:440460
- Source identifiers:
-
440460
- Deposit date:
-
2013-12-12
Terms of use
- Copyright date:
- 2013
- Notes:
-
Revised version corrects the energy threshold for figure 7 (bottom)
and one affiliation in the author list. The effective area (figure 7, top) is
not affected and remains unchanged. The correction does not influence any of
the results presented in the paper, and the text remains unchanged. Address
correspondence to: Claudio Kopper, Naoko Kurahashi, Nathan Whitehorn
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