PoS - Proceedings of Science
Volume 358 - 36th International Cosmic Ray Conference (ICRC2019) - NU - Neutrino
Constraints on sterile neutrino mixing usingIceCube atmospheric neutrino data
S. Razzaque,* L.S. Miranda
*corresponding author
Full text: pdf
Pre-published on: July 22, 2019
Published on:
Sterile neutrinos with $\sim 1$ eV mass scale can resolve anomalies reported in short-baseline neutrino oscillation experiments. The same sterile neutrinos can affect the atmospheric neutrino fluxes at the detectors such as IceCube in the TeV energy range. Recent IceCube search results for a sterile neutrino resulted in stringent constraints on its mass and mixing with active neutrinos, essentially excluding the parameter space favored by the short-baseline experiments. In our recent reanalysis of IceCube data we show that sterile-active neutrino mixing schemes affect interpretation of the excluded parameter regions. We present exclusion regions in the mixing angle range $0.01 \le \sin^2\theta_{24} \le 0.1$ and mass-squared difference range $0.1~{\rm eV}^2 \le \Delta m_{42}^2 \le 10~{\rm eV}^2$ for the mass-mixing and flavor-mixing schemes. We exclude the parameter space favored by recent MiniBooNE analysis at $\gtrsim 2\sigma$~CL for both schemes. Furthermore, we find that a prompt atmospheric neutrino flux contribution can relax the constraints on the sterile neutrino mass-squared difference for $\Delta m_{42}^2 \gtrsim 1~{\rm eV}^2$.
DOI: https://doi.org/10.22323/1.358.0987
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.