Journal article
Atmospheric and astrophysical neutrinos above 1 TeV interacting in IceCube
Physical review. D, Particles, fields, gravitation, and cosmology, v 91(2), p022001
2015
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The IceCube Neutrino Observatory was designed primarily to search for high-energy (TeV-PeV) neutLrinos produced in distant astrophysical objects. A search for. greater than or similar to 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, Phi(v) = 2.06(-0.3)(+0.4) x 10(-18) (E-v = 10(5) GeV)-2.46 +/- 0.12GeV-1 cm(-2) sr(-1) s(-1) for 25 TeV < E-v < 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.
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Details
- Title
- Atmospheric and astrophysical neutrinos above 1 TeV interacting in IceCube
- Creators
- Maryon Ahrens - Oskar Klein-centrum för kosmopartikelfysik (OKC)Christian Bohm - Stockholm UniversityMatthias Danninger - Stockholm UniversityChad Finley - Stockholm UniversitySamuel Flis - Stockholm UniversityPer Olof Hulth - Stockholm UniversityKlas Hultqvist - Stockholm UniversityChristian Walck - Stockholm UniversityMartin Wolf - Oskar Klein-centrum för kosmopartikelfysik (OKC)Marcel Zoll - Stockholm UniversityIceCube Collaboration
- Publication Details
- Physical review. D, Particles, fields, gravitation, and cosmology, v 91(2), p022001
- Publisher
- Cold Spring Harbor Press
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000347924700001
- Scopus ID
- 2-s2.0-84926352976
- Other Identifier
- 991019168368304721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics
- Physics, Particles & Fields