Probing Non-Standard Interaction of Neutrinos with IceCube and DeepCore

Abstract

We consider effects of the Non-Standard Interactions (NSI) on oscillations of the high energy atmospheric neutrinos. The ν_μ-oscillograms are constructed and their dependence on the NSI strength parameters ε_{αβ} studied. We computed zenith angle distributions of the ν_μ-events in the presence of NSI in different energy regions. The distributions are confronted with the IceCube-79 (high energy sample) and the DeepCore (low energy sample) data and constraints on the strength parameters |ε_{μτ}| < 6x10^-3 and |ε_{μμ}-ε_{ττ}| < 3x10^-2 (90% C.L.) have been obtained. Future measurements of the zenith angle distributions by DeepCore in smaller energy bins will allow to improve the bounds by factor 2 - 3. We discuss the signatures of NSI in zenith angle and energy distributions of events which allow to discriminate them from the effects of sterile neutrinos.

30 pages, 15 figures; v2: Typos corrected, several comments added

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