Relic Neutrino Background from Cosmic-Ray Reservoirs
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866929662254383104 |
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| author | De Marchi, Andrea Giovanni Granelli, Alessandro Nava, Jacopo Sala, Filippo |
| author_facet | De Marchi, Andrea Giovanni Granelli, Alessandro Nava, Jacopo Sala, Filippo |
| contents | We compute the flux of relic neutrino background (R$ν$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$ν$B up-scattered by UHECRs on their way to Earth, which we also compute. We find that IceCube excludes R$ν$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$ν$B fluxes for both cases of neutrino mass spectrum with normal and inverted ordering, providing new handles to possibly disentangle the up-scattered R$ν$B from cosmogenic neutrinos. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_04568 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Relic Neutrino Background from Cosmic-Ray Reservoirs De Marchi, Andrea Giovanni Granelli, Alessandro Nava, Jacopo Sala, Filippo High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Astrophysical Phenomena We compute the flux of relic neutrino background (R$ν$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$ν$B up-scattered by UHECRs on their way to Earth, which we also compute. We find that IceCube excludes R$ν$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$ν$B fluxes for both cases of neutrino mass spectrum with normal and inverted ordering, providing new handles to possibly disentangle the up-scattered R$ν$B from cosmogenic neutrinos. |
| title | Relic Neutrino Background from Cosmic-Ray Reservoirs |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2405.04568 |