Details

Autor(en) / Beteiligte

• Ackermann, M
• Aguilar, J A
• Altmann, D
• Bai, X
• Beatty, J J
• Becker, K-H
• Bell, M
• BenZvi, S
• Berdermann, J
• Berley, D
• Bernardini, E
• Bindig, D
• Blumenthal, J
• Boersma, D J
• Bose, D
• Böser, S
• Brown, A M
• Bruijn, R
• Chirkin, D
• Christy, B
• Cowen, D F
• Danninger, M
• Daughhetee, J
• Davis, J C
• De Clercq, C
• Díaz-Vélez, J C
• Eagan, R
• Evenson, P A
• Fadiran, O
• Feusels, T
• Finley, C
• Frantzen, K
• Gaisser, T K
• Glüsenkamp, T
• Grant, D
• Hallen, P
• Halzen, F
• Heereman, D
• Hickford, S
• Hill, G C
• Hoffman, K D
• Hoshina, K
• Jacobsen, J
• Jagielski, K
• Japaridze, G S
• Kaminsky, B
• Karg, T
• Kiryluk, J
• Klein, S R
• Kolanoski, H
• Koskinen, D J
• Kowalski, M
• Krasberg, M
• Landsman, H
• Lesiak-Bzdak, M
• Leute, J
• Madsen, J
• Maruyama, R
• Mase, K
• Matis, H S
• Meagher, K
• Miarecki, S
• Montaruli, T
• Nahnhauer, R
• Nowicki, S C
• Obertacke, A
• Olivas, A
• Paul, L
• Pepper, J A
• Pieloth, D
• Pinat, E
• Pirk, N
• Posselt, J
• Rädel, L
• Redl, P
• Ribordy, M
• Saba, S M
• Scheriau, F
• Schönwald, A
• Schukraft, A
• Schulte, L
• Sheremata, C
• Smith, M W E
• Stasik, A
• Strahler, E A
• Ström, R
• Ter-Antonyan, S
• Usner, M
• van Eijndhoven, N
• Wasserman, R
• Wellons, M
• Wendt, C
• Westerhoff, S
• Wiebusch, C H
• Williams, D R
• Wolf, M
• Xu, X W
• Yanez, J P
• Zarzhitsky, P
• Zierke, S

Titel

First observation of PeV-energy neutrinos with IceCube

Ist Teil von

• Physical review letters, 2013-07, Vol.111 (2), p.021103-021103, Article 021103

Ort / Verlag

United States

Erscheinungsjahr

2013

Link zum Volltext

Quelle

American Physical Society

Beschreibungen/Notizen

• 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 ν(e,μ,τ) (ν(e,μ,τ)) or charged-current ν(e) (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)(-0.057)(+0.041)(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.