First observation of PeV-energy neutrinos with IceCube
- 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.
DOIAbstract
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 in...
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