Search for sterile neutrino mixing using three years of IceCube DeepCore data
Name
PhysRevD.95.112002.pdf
Size
1.23 MB
Format
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Checksum (MD5)
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Author(s)
Aartsen, M. G.
Ackermann, M.
Adams, J.
Aguilar, J. A.
Ahlers, M.
Ahrens, M.
Al Samarai, I.
Altmann, D.
Andeen, K.
Anderson, T.
Date Issued
June 2017
Journal
Physical Review D
Publisher
American Physical Society
Citation
Aartsen, M.G. et al. “Search for Sterile Neutrino Mixing Using Three Years of IceCube DeepCore Data.” Physical Review D 95.11 (2017): n. pag. © 2017 American Physical Society
Version
Final published version
Abstract
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 (Δm[subscript 41][superscript 2] ∼1 eV[superscript 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 |U[subscript μ4]|[superscript 2]<0.11 and |U[subscript τ4]|[superscript 2]<0.15 (90% C.L.) for the sterile neutrino mass splitting Δm[subscript 41][superscript 2]=1.0 eV[superscript 2].
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.95.112002
