Evidence for High-Energy Extraterrestrial Neutrinos at the IceCube Detector

6533b7dafe1ef96bd126e38b

RESEARCH PRODUCT

Evidence for High-Energy Extraterrestrial Neutrinos at the IceCube Detector

I Collaboration Mg Aartsen R Abbasi Y Abdou M Ackermann J Adams J Aguilar M Ahlers D Altmann J Auffenberg X Bai M Baker S Barwick V Baum R Bay J Beatty S Bechet J Tjus K Becker M Benabderrahmane S Benzvi P Berghaus D Berley E Bernardini A Bernhard D Bertrand D Besson G Binder D Bindig M Bissok E Blaufuss J Blumenthal D Boersma S Bohaichuk C Bohm D Bose S Böser O Botner L Brayeur H Bretz A Brown R Bruijn J Brunner M Carson J Casey M Casier D Chirkin A Christov B Christy K Clark F Clevermann S Coenders S Cohen D Cowen A Silva M Danninger J Daughhetee J Davis M Day C Clercq S Ridder P Desiati K Vries Md With T Deyoung J Díaz-vélez M Dunkman R Eagan B Eberhardt B Eichmann J Eisch R Ellsworth S Euler P Evenson O Fadiran A Fazely A Fedynitch J Feintzeig T Feusels K Filimonov C Finley T Fischer-wasels S Flis A Franckowiak K Frantzen T Fuchs T Gaisser J Gallagher L Gerhardt L Gladstone T Glüsenkamp A Goldschmidt G Golup J Gonzalez J Goodman D Góra D Grandmont D Grant A Groß C Ha A Ismail P Hallen A Hallgren F Halzen K Hanson D Heereman D Heinen K Helbing R Hellauer S Hickford G Hill K Hoffman R Hoffmann A Homeier K Hoshina W Huelsnitz P Hulth K Hultqvist S Hussain A Ishihara E Jacobi J Jacobsen K Jagielski G Japaridze K Jero O Jlelati B Kaminsky A Kappes T Karg A Karle J Kelley J Kiryluk J Kläs Sr Klein J Köhne G Kohnen H Kolanoski L Köpke C Kopper S Kopper D Koskinen M Kowalski M Krasberg K Krings G Kroll J Kunnen N Kurahashi T Kuwabara M Labare H Landsman M Larson M Lesiak-bzdak M Leuermann J Leute J Lünemann J Madsen G Maggi R Maruyama K Mase H Matis F Mcnally K Meagher M Merck T Meures S Miarecki E Middell N Milke J Miller L Mohrmann T Montaruli R Morse R Nahnhauer U Naumann H Niederhausen S Nowicki Dr Nygren A Obertacke S Odrowski A Olivas A O'murchadha L Paul J Pepper C Heros C Pfendner D Pieloth E Pinat J Posselt P Price G Przybylski L Rädel M Rameez K Rawlins P Redl R Reimann E Resconi W Rhode M Ribordy M Richman B Riedel J Rodrigues C Rott T Ruhe B Ruzybayev D Ryckbosch S Saba T Salameh H Sander M Santander S Sarkar K Schatto F Scheriau T Schmidt M Schmitz S Schoenen S Schöneberg A Schönwald A Schukraft L Schulte O Schulz D Seckel Y Sestayo S Seunarine R Shanidze C Sheremata M Smith D Soldin G Spiczak C Spiering M Stamatikos T Stanev A Stasik T Stezelberger R Stokstad A Stößl E Strahler R Ström G Sullivan H Taavola I Taboada A Tamburro A Tepe S Ter-antonyan G Tešić S Tilav P Toale S Toscano E Unger M Usner N Eijndhoven A Overloop J Santen M Vehring M Voge M Vraeghe C Walck T Waldenmaier M Wallraff C Weaver M Wellons C Wendt S Westerhoff N Whitehorn K Wiebe C Wiebusch Dr Williams H Wissing M Wolf T Wood K Woschnagg D Xu X Xu J Yanez G Yodh S Yoshida P Zarzhitsky J Ziemann S Zierke M Zoll

subject

Particle physics Cosmology and Nongalactic Astrophysics (astro-ph.CO)General Science & Technology Physics::Instrumentation and Detectors Solar neutrino Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences ddc:500.2 Astrophysics IceCube Collaboration 01 natural sciences 7. Clean energy High Energy Physics - Experiment IceCube Neutrino Observatory IceCube High Energy Physics - Experiment (hep-ex)MD Multidisciplinary 0103 physical sciences 010303 astronomy & astrophysics astro-ph.HE Physics High Energy Astrophysical Phenomena (astro-ph.HE)Multidisciplinary hep-ex 010308 nuclear & particles physics High Energy Physics::Phenomenology neutrinos Solar neutrino problem KM3NeT Neutrino detector 13. Climate action astro-ph.CO Measurements of neutrino speed High Energy Physics::Experiment ddc:500 Neutrino Neutrino astronomy Astrophysics - High Energy Astrophysical Phenomena physics Astrophysics - Cosmology and Nongalactic Astrophysics

description

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.

year	journal	country	edition	language
2013-11-22	Science

10.1126/science.1242856 http://arxiv.org/abs/arXiv:1311.5238