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Measurement of the Atmospheric nu(e) Spectrum with IceCube
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2015 (English)In: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 91, no 12, 122004Article in journal (Refereed) Published
Abstract [en]

We present a measurement of the atmospheric nu(e) spectrum at energies between 0.1 and 100 TeV using data from the first year of the complete IceCube detector. Atmospheric nu(e) originate mainly from the decays of kaons produced in cosmic-ray air showers. This analysis selects 1078 fully contained events in 332 days of live time, and then identifies those consistent with particle showers. A likelihood analysis with improved event selection extends our previous measurement of the conventional v(e) fluxes to higher energies. The data constrain the conventional nu(e) flux to be 1.3(-0.3)(+0.4) times a baseline prediction from a Honda's calculation, including the knee of the cosmic-ray spectrum. A fit to the kaon contribution (xi) to the neutrino flux finds a kaon component that is xi = 1.3(-0.4)(+0.5) times the baseline value. The fitted/measured prompt neutrino flux from charmed hadron decays strongly depends on the assumed astrophysical flux and shape. If the astrophysical component follows a power law, the result for the prompt flux is 0.0(-0.0)(+3.0) times a calculated flux based on the work by Enberg, Reno, and Sarcevic.

Place, publisher, year, edition, pages
2015. Vol. 91, no 12, 122004
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Physical Sciences
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URN: urn:nbn:se:uu:diva-258762DOI: 10.1103/PhysRevD.91.122004ISI: 000357027100002OAI: oai:DiVA.org:uu-258762DiVA: diva2:842514
Available from: 2015-07-20 Created: 2015-07-20 Last updated: 2017-12-04Bibliographically approved

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Boersma, David J.Botner, OlgaEuler, SebastianHallgren, AllanPerez de los Heros, CarlosStröm, RickardTaavola, Henric

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