Bounds on non-standard interactions of neutrinos from IceCube DeepCore data

TL;DR

This paper uses three years of IceCube DeepCore atmospheric neutrino data to set new bounds on non-standard neutrino interactions, especially in the mu-tau and electron neutrino sectors.

Contribution

It provides the first comprehensive constraints on non-standard neutrino interactions using IceCube DeepCore data, improving previous bounds significantly.

Findings

Stricter bounds on mu-tau non-standard interactions.

Constraints on flavor-changing interactions involving electron neutrinos.

Demonstrates IceCube DeepCore's capability to probe new physics in neutrino propagation.

Abstract

New physics in neutrino sector can reveal itself via non-standard neutrino interactions which can result in modification of the standard picture of neutrino propagation in matter. Experiments with atmospheric neutrinos has been used to probe this scenario. Using publicly available three-year low energy data in IceCube DeepCore we place bounds on the parameters $\epsilon_{\alpha\beta}$ of non-standard neutrino interactions in propagation. We obtain restrictive constraints not only for $\mu\tau$ sector but also for flavor changing interactions involving electron neutrinos.