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Relic Neutrino Background from Cosmic-Ray Reservoirs

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arxiv 2405.04568 v2 pith:N6VGOQDO submitted 2024-05-07 hep-ph astro-ph.COastro-ph.HE

classification hep-phastro-ph.COastro-ph.HE
keywords up-scatteredneutrinobackgroundclusterscomputefluxlargerrelic
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

We compute the flux of relic neutrino background (R$\nu$B) up-scattered by ultra-high-energy (UHE) cosmic rays (CRs) in clusters that act as CR-reservoirs. The long trapping times of UHECRs make this flux larger than that of R$\nu$B up-scattered by UHECRs on their way to Earth, which we also compute. We find that IceCube excludes R$\nu$B weighted overdensities larger than $10^{10}$ in clusters, and that PUEO, RNO-G, GRAND and IceCube-Gen2 will test values down to $10^{8}$. Our treatment incorporates the momentum transfer dependence of the neutrino-nucleus cross section, deep inelastic scattering, a mixed UHECR composition, and flavour information on the up-scattered R$\nu$B fluxes for both cases of neutrino mass spectrum with normal and inverted ordering, providing new handles to possibly disentangle the up-scattered R$\nu$B from cosmogenic neutrinos.

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Cited by 2 Pith papers

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

  1. The Cosmic Neutrino Background is within Reach of Future Neutrino Telescopes

    hep-ph 2026-01 conditional novelty 6.0 of 10

    Including deep-inelastic scattering makes cosmic-ray-boosted relic neutrinos bright enough for IceCube to bound the CνB overdensity to ~100–1000, and future networks could reach the ΛCDM value.

  2. High-Energy Neutrinos from Cosmic-Ray Scatterings with Supernova Neutrinos

    hep-ph 2025-08 conditional novelty 5.0 of 10

    Cosmic-ray boosted supernova neutrinos could be detectable in optimistic astrophysical scenarios and yield a bound of about 30 TeV on the extra-dimensional scale.

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