Measurement of the Diffuse Astrophysical Muon-Neutrino Spectrum with Ten Years of IceCube Data

2019/08/26 by Stettner, Joeran
#FOS: Physical sciences #High Energy Astrophysical Phenomena (astro-ph.HE)

paper · doi:10.48550/arxiv.1908.09551

Abstract

The IceCube Neutrino Observatory measured a flux of high-energy astrophysical neutrinos in several detection channels. The energy spectrum is fitted as unbroken power-law, but different best-fit parameters were obtained in the various analyses covering different energy ranges between few TeV to 10 PeV. Here, we present an update to the analysis of through-going muon-neutrinos from the Northern Hemisphere. It was extended to almost ten years of data and an improved treatment of systematic uncertainties on the atmospheric fluxes was implemented. The updated best-fit parameters for the astrophysical flux assuming a power-law energy spectrum are Φ_astro=1.44 and γ_astro=2.28. We will present the results of the spectral fit and discuss how the measured flux compares to other IceCube results.

Related

• A Combined Fit of the Diffuse Neutrino Spectrum using IceCube Muon Tracks and Cascades
• Probing the PeV Region in the Astrophysical Neutrino Spectrum using ν_μ from the Southern Sky
• Improved measurements of the TeV--PeV extragalactic neutrino spectrum from joint analyses of IceCube tracks and cascades
• Searching for High Energy Diffuse Astrophysical Muon Neutrinos with IceCube
• Searches for and Characterization of Astrophysical Neutrinos using Starting Track Events in IceCube