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Searches for sterile neutrinos with IceCube DeepCore
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abstract
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.
Forward citations
Cited by 3 Pith papers
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A sterile neutrino with a novel density-dependent matter potential Vs resolves multiple oscillation anomalies when Vs is negative and mixing angles are small.
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An analytic effective theory of the sterile-active MSW resonance in the (3+1) model reveals that only three channels, P(νe→νe), P(ν̄e→ν̄e), and P(ν̄μ→ν̄τ), carry unsuppressed on-peak resonance effects.
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New parameter region in sterile neutrino searches: a scenario to alleviate cosmological neutrino mass bound and its testability at oscillation experiments
IceCube can test massless sterile neutrinos lighter than active neutrinos in the inverted-ordering regime, with sensitivity to sin^2 2theta24 ~ 10^-2 at |Delta m^2_41| ~ 0.2 eV^2, a region opened by the Farzan-Hannest...
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