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Measurement of the astrophysical diffuse neutrino flux in a combined fit of IceCube's high energy neutrino data

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arxiv 2308.00191 v1 pith:E2ELMPX7 submitted 2023-07-31 astro-ph.HE

Richard Naab , Erik Ganster , Zelong Zhang (for the IceCube Collaboration) This is my paper · ORCID
classification astro-ph.HE
keywords neutrinoastrophysicaldiffusecombineddatafluxchannelsdetection
verification ladder T0 review T1 audit T2 compute T3 formal
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The IceCube Neutrino Observatory has discovered a diffuse neutrino flux of astrophysical origin and measures its properties in various detection channels. With more than 10 years of data, we use multiple data samples from different detection channels for a combined fit of the diffuse astrophysical neutrino spectrum. This leverages the complementary information of different neutrino event signatures. For the first time, we use a coherent modelling of the signal and background, as well as the detector response and corresponding systematic uncertainties. The detector response is continuously varied during the simulation in order to generate a general purpose Monte Carlo set, which is central to our approach. We present a combined fit yielding a measurement of the diffuse astrophysical neutrino flux properties with unprecedented precision.

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Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Can Quasi-periodic Eruptions Produce Detectable High Energy Neutrinos?

    astro-ph.HE 2025-09 conditional novelty 6.0 of 10

    Quasi-periodic eruptions could accelerate protons to tens of TeV, but their 10-year neutrino fluences and IceCube event rates are too low for individual detection except for very nearby sources.

  2. All-flavor Time-dependent Search for Transient Neutrino Sources

    astro-ph.HE 2025-07 accept novelty 6.0 of 10

    A new IceCube search combines all flavor channels, yielding ~10-15% better sensitivity to short transient neutrino flares and showing that power-law fits can miss cutoff spectra.

  3. TAMBO: A Deep-Valley Neutrino Observatory

    astro-ph.HE 2025-07 conditional novelty 6.0 of 10

    A mountain-valley array of 5,000 particle detectors could detect Earth-skimming tau neutrinos in the PeV to EeV range with high cosmic purity and an aperture larger than IceCube's above 2 PeV.

  4. Measurement of the diffuse astrophysical neutrino flux over six seasons using cascade events from the Baikal-GVD expanding telescope

    astro-ph.HE 2025-07 conditional novelty 6.0 of 10

    Baikal-GVD detects the diffuse astrophysical neutrino flux at 5.1 sigma, with spectral index 2.64 and per-flavor normalization 4.42e-18 GeV^-1 cm^-2 s^-1 sr^-1 at 100 TeV.

  5. The ultra-high-energy event KM3-230213A within the global neutrino landscape

    astro-ph.HE 2025-02 conditional novelty 6.0 of 10

    A single ultra-high-energy neutrino seen by KM3NeT is in 2.5-3 sigma tension with non-observations by IceCube and Pierre Auger, but global data do not yet require a spectral break.

  6. On the Blueprint of Active Galaxies Producing Neutrinos

    astro-ph.HE 2026-07 conditional novelty 4.0 of 10

    Neutrinos from active galaxies are produced in compact X-ray-bright coronae within about ten Schwarzschild radii of the black hole, and such sources may supply the diffuse neutrino flux.

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