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Search for sterile neutrino mixing using three years of IceCube DeepCore data
Univ Adelaide, Dept Phys, Adelaide, SA 5005, Australia..
DESY, D-15735 Zeuthen, Germany..
Univ Canterbury, Dept Phys & Astron, Private Bag 4800, Christchurch, New Zealand..
Univ Libre Bruxelles, Sci Fac, CP230, B-1050 Brussels, Belgium..
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2017 (English)In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 95, no 11, 112002Article in journal (Refereed) Published
Abstract [en]

We present a search for a light sterile neutrino using three years of atmospheric neutrino data from the DeepCore detector in the energy range of approximately 10-60 GeV. DeepCore is the low-energy subarray of the IceCube Neutrino Observatory. The standard three-neutrino paradigm can be probed by adding an additional light (Delta m(41)(2) similar to 1 eV(2)) sterile neutrino. Sterile neutrinos do not interact through the standard weak interaction and, therefore, cannot be directly detected. However, their mixing with the three active neutrino states leaves an imprint on the standard atmospheric neutrino oscillations for energies below 100 GeV. A search for such mixing via muon neutrino disappearance is presented here. The data are found to be consistent with the standard three-neutrino hypothesis. Therefore, we derive limits on the mixing matrix elements at the level of vertical bar U mu(4)vertical bar(2) < 0.11 and vertical bar U-tau 4 vertical bar(2) < 0.15 (90% C. L.) for the sterile neutrino mass splitting Delta m(41)(2) = 1.0 eV(2).

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2017. Vol. 95, no 11, 112002
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:uu:diva-329671DOI: 10.1103/PhysRevD.95.112002ISI: 000403356700001OAI: oai:DiVA.org:uu-329671DiVA: diva2:1145373
Available from: 2017-09-28 Created: 2017-09-28 Last updated: 2017-09-28Bibliographically approved

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Botner, OlgaBurgman, AlexanderEuler, SebastianHallgren, Allande los Heros, CarlosStröm, RickardTaavola, HenricUnger, E.
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