Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/100897
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Type: Journal article
Title: Atmospheric and astrophysical neutrinos above 1 TeV interacting in IceCube
Author: Aartsen, M.
Ackermann, M.
Adams, J.
Aguilar, J.
Ahlers, M.
Ahrens, M.
Altmann, D.
Anderson, T.
Arguelles, C.
Arlen, T.
Auffenberg, J.
Bai, X.
Barwick, S.
Baum, V.
Bay, R.
Beatty, J.
Becker Tjus, J.
Becker, K.
Benzvi, S.
Berghaus, P.
et al.
Citation: Physical Review D: Particles, Fields, Gravitation and Cosmology, 2015; 91(2):022001-1-022001-16
Publisher: American Physical Society
Issue Date: 2015
ISSN: 1550-7998
1550-2368
Statement of
Responsibility: 
M. G. Aartsen ... G. C. Hill ... S. Robertson ... B. J. Whelan ... et al. (IceCube Collaboration)
Abstract: The IceCube Neutrino Observatory was designed primarily to search for high-energy (TeV-PeV) neutrinos produced in distant astrophysical objects. A search for ≳100  TeV neutrinos interacting inside the instrumented volume has recently provided evidence for an isotropic flux of such neutrinos. At lower energies, IceCube collects large numbers of neutrinos from the weak decays of mesons in cosmic-ray air showers. Here we present the results of a search for neutrino interactions inside IceCube’s instrumented volume between 1 TeV and 1 PeV in 641 days of data taken from 2010–2012, lowering the energy threshold for neutrinos from the southern sky below 10 TeV for the first time, far below the threshold of the previous high-energy analysis. Astrophysical neutrinos remain the dominant component in the southern sky down to a deposited energy of 10 TeV. From these data we derive new constraints on the diffuse astrophysical neutrino spectrum, Φν=2.06+0.4−0.3×10−18(Eν/105  GeV)−2.46±0.12GeV−1 cm−2 sr−1 s−1 for 25  TeV<Eν<1.4  PeV, as well as the strongest upper limit yet on the flux of neutrinos from charmed-meson decay in the atmosphere, 1.52 times the benchmark theoretical prediction used in previous IceCube results at 90% confidence.
Rights: © 2015 American Physical Society
DOI: 10.1103/PhysRevD.91.022001
Grant ID: ARC
Published version: http://dx.doi.org/10.1103/PhysRevD.91.022001
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