Search for sterile neutrino mixing using three years of IceCube DeepCore data
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Issue Date
2017-06-15Author
IceCube Collaboration
Publisher
American Physical Society
Type
Article
Article Version
Scholarly/refereed, publisher version
Rights
© 2017 American Physical Society
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Show full item recordAbstract
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 (Δm241∼1 eV2) 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 |Uμ4|2<0.11 and |Uτ4|2<0.15 (90% C.L.) for the sterile neutrino mass splitting Δm241=1.0 eV2.
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Citation
iceCube Collaboration. "Search for sterile neutrino mixing using three years of IceCube DeepCore data”, Physical review D. (2017) 95:11. https://doi.org/10.1103/PhysRevD.95.112002
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