Evidence for High-Energy Extraterrestrial Neutrinos at the IceCube Detector
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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 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 4σ 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.
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The record
- Venue
- Science
- Topic
- Astrophysics and Cosmic Phenomena
- Field
- Physics and Astronomy
- Canadian institutions
- —
- Funders
- Office of Polar ProgramsBundesministerium für Bildung und ForschungMarsden FundJapan Society for the Promotion of ScienceHelmholtz Alliance for Astroparticle PhysicsU.S. Department of EnergyUniversity of Wisconsin-MadisonVetenskapsrådetNatural Sciences and Engineering Research Council of CanadaKnut och Alice Wallenbergs StiftelseNational Research Foundation of KoreaFonds Wetenschappelijk OnderzoekNational Science FoundationBelgian Federal Science Policy OfficeDeutsche ForschungsgemeinschaftScience and Technology Facilities CouncilNational Research FoundationWestern Canada Research GridVlaamse regeringUniversity of OxfordCompute CanadaFonds De La Recherche Scientifique - FNRSPolarforskningssekretariatetSchweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
- Keywords
- NeutrinoPhysicsExtraterrestrial lifeSkyMuonNeutrino astronomyNeutrino detectorEnergy (signal processing)DetectorParticle physicsAstronomyAstrophysicsNeutrino oscillation
- Has abstract in OpenAlex
- yes