# Revisiting constraints on 3+1 active-sterile neutrino mixing using IceCube data

## TL;DR

This paper reanalyzes IceCube data to refine constraints on 3+1 sterile neutrino mixing, addressing tensions with other experiments and exploring different mixing schemes and atmospheric neutrino flux effects.

## Contribution

It provides new exclusion regions for sterile neutrino parameters using IceCube data under two mixing schemes, clarifying tensions with MiniBooNE and other experiments.

## Key findings

- Exclusion regions in parameter space for sterile neutrino mixing.
- Mass-mixing scheme excludes certain allowed regions at >3σ.
- Including atmospheric prompt flux relaxes constraints for Δm²₄₂ > 1 eV².

## Abstract

Recent IceCube search results for sterile neutrino increased tension between the combined appearance and disappearance experiments. On the other hand, MiniBooNE latest data confirms at $4.9\sigma$ CL the short-baseline oscillation anomaly. We analyze published IceCube data based on two different active-sterile mixing schemes using one additional sterile neutrino flavor. We present exclusion regions in the parameter ranges $0.01 \le \sin^2 \theta_{24} \le 0.1$ and $0.1~{\rm eV}^2 \le \Delta m^2_{42} \le 10~{\rm eV}^2$ for the mass-mixing and flavor-mixing schemes. Under the more conservative mass-mixing scheme, $3\sigma$ CL allowed regions for the appearance experiment and MiniBooNE latest result are excluded at $\gtrsim 3\sigma$ CL. In case of less-restrictive flavor-mixing scheme, results from the appearance experiments are excluded at $\gtrsim 2\sigma$ CL. We also find that including prompt component of the atmospheric neutrino flux relaxes constraints on sterile mixing for $\Delta m^2_{42} \gtrsim 1~{\rm eV}^2$.