Probing Non-Standard Interaction of Neutrinos with IceCube and DeepCore

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 the 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( )|≲ 6 × 10(−3) and |ϵ ( )μμ( ) − ϵ ( )ττ( )| ≲ 3 × 10(−2) (90% C.L.) have been obtained. Future measurements of the zenith angle distributions by DeepCore in several energy bins will allow to improve the bounds by factor 2–3. We discuss the signatures of NSI in the zenith angle and energy distributions of events which allow to discriminate them from the effects of sterile neutrinos.

Note:

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

neutrino: interaction
neutrino: oscillation
neutrino: sterile
neutrino: atmosphere
neutrino: energy: high
confidence limit
IceCube
PINGU
numerical calculations
new physics

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