First observation of PeV-energy neutrinos with IceCube
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Authors
Aartsen, M.
Abbasi, R.
Abdou, Y.
Ackermann, M.
Adams, J.
Aguilar, J.
Ahlers, M.
Altmann, D.
Auffenberg, J.
Bai, X.
Baker, M.
Barwick, S.
Baum, V.
Bay, R.
Beatty, J.
Bechet, S.
Becker Tjus, J.
Becker, K.
Bell, M.
Benabderrahmane, M.
Benzvi, S.
Berdermann, J.
Berghaus, P.
Berley, D.
Bernardini, E.
Bernhard, A.
Bertrand, D.
Besson, D.
Binder, G.
Bindig, D.
Bissok, M.
Blaufuss, E.
Blumenthal, J.
Boersma, D.
Bohaichuk, S.
Bohm, C.
Bose, D.
Böser, S.
Botner, O.
Brayeur, L.
Bretz, H.
Brown, A.
Bruijn, R.
Brunner, J.
Carson, Michael
Casey, J.
Casier, M.
Chirkin, D.
Christov, A.
Christy, B.
Clark, K.
Clevermann, F.
Coenders, S.
Cohen, S.
Cowen, D.
Cruz Silva, A.
Danninger, M.
Daughhetee, J.
Davis, J.
De Clercq, C.
De Ridder, S.
Desiati, P.
De With, M.
Deyoung, T.
Díaz-Vélez, J.
Dunkman, M.
Eagan, R.
Eberhardt, B.
Eisch, J.
Ellsworth, R.
Euler, S.
Evenson, P.
Fadiran, O.
Fazely, A.
Fedynitch, A.
Feintzeig, J.
Feusels, T.
Filimonov, K.
Finley, C.
Fischer-Wasels, T.
Flis, S.
Franckowiak, A.
Franke, R.
Frantzen, K.
Fuchs, T.
Gaisser, T.
Gallagher, J.
Gerhardt, L.
Gladstone, L.
Glüsenkamp, T.
Goldschmidt, A.
Golup, G.
Gonzalez, J.
Goodman, J.
Góra, D.
Grant, D.
Date
2013Type
Journal Article
Metadata
Show full item recordCitation
Aartsen, M. and Abbasi, R. and Abdou, Y. and Ackermann, M. and Adams, J. and Aguilar, J. and Ahlers, M. et al. 2013. First observation of PeV-energy neutrinos with IceCube. Physical Review Letters. 111 (2).
Source Title
Physical Review Letters
ISSN
School
Department of Exploration Geophysics
Collection
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 νe,μ,τ (ν¯e,μ,τ) or charged-current νe (ν¯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)+0.041−0.057(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.
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