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Search for sterile neutrino mixing using three years of IceCube DeepCore data
Journal article   Open access   Peer reviewed

Search for sterile neutrino mixing using three years of IceCube DeepCore data

Maryon Ahrens, Christian Bohm, Jonathan P. Dumm, Chad Finley, Samuel Flis, Klas Hultqvist, Christian Walck, Martin Wolf, Marcel Zoll and IceCube Collaboration
Physical review. D, v 95(11)
2017
DOI: https://doi.org/10.1103/PhysRevD.95.112002
url
https://doi.org/10.1103/physrevd.95.112002View
Accepted (AM)Open Access (Publisher-Specific),  Open

Abstract

Fysik Naturvetenskap Natural Sciences Physical Sciences
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).

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Domestic collaboration
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Astronomy & Astrophysics
Physics, Particles & Fields
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