Searches for sterile neutrinos with IceCube DeepCore

Details Searches for sterile neutrinos with IceCube DeepCore Searches for sterile neutrinos with IceCube DeepCore

2012-03-24

arxiv.org/abs/1203.5406v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

PDFLaTeX, 6 pages, 6 PDF figures, minor comments added, accepted in Phys. Rev. D

Scientific paper

We show that study of the atmospheric neutrinos in the 10--100 GeV energy range by DeepCore sub-array of the IceCube Neutrino Observatory can substantially constrain the mixing of sterile neutrinos of mass $\sim 1$ eV with active neutrinos. In the scheme with one sterile neutrino we calculate $\nu_\mu-$ and $\bar{\nu}_\mu-$ oscillation probabilities as well as zenith angle distributions of $\nu_\mu^{CC}$ events in different energy intervals in DeepCore. The distributions depend on the mass hierarchy of active neutrinos. Therefore, in principle, the hierarchy can be identified, if $\nu_s$ exists. After a few years of exposure the DeepCore data will allow to exclude the mixing $|U_{\mu 4}|^2 \geq 0.02$ indicated by the LSND/MiniBooNE results. Combination of the DeepCore and high energy IceCube data will further improve sensitivity to $\nu_s$ mixing parameters.

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