Upper Limits on the Cosmic Neutrino Background from Cosmic Rays
| Autor: | Císcar-Monsalvatje, Mar, Herrera, Gonzalo, Shoemaker, Ian M. |
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| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Phys. Rev. D 110, 063036 (2024) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevD.110.063036 |
| Popis: | Extragalactic and galactic cosmic rays scatter with the cosmic neutrino background during propagation to Earth, yielding a flux of relic neutrinos boosted to larger energies. If an overdensity of relic neutrinos is present in galaxies, and neutrinos are massive enough, this flux might be detectable by high-energy neutrino experiments. For a lightest neutrino of mass $m_{\nu} \sim 0.1$ eV, we find an upper limit on the local relic neutrino overdensity of $\sim 10^{13}$ and an upper limit on the relic neutrino overdensity at TXS 0506+056 of $\sim 10^{10}$. Future experiments like GRAND or IceCube-Gen2 could improve these bounds by orders of magnitude. Comment: Matches published version in PRD. Added comparison of experimentally measured neutrino-proton cross section with our analytical expression; added limits on CnuB overdensities from Galaxy clusters and the critical density of the Universe |
| Databáze: | arXiv |
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