Ultra-high energy cosmic rays and new physics
Cosmic rays with energies beyond the Greisen-Zatsepin-Kuzmin `cutoff' at $\sim 4 \times 10^{10}$ GeV pose a conundrum, the solution of which requires either drastic revision of our astrophysical understanding, or new physics beyond the Standard Model. Nucleons of such energies must originate wi...
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| Format: | Report |
| Language: | unknown |
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arXiv
2002
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| Online Access: | https://dx.doi.org/10.48550/arxiv.hep-ph/0202013 https://arxiv.org/abs/hep-ph/0202013 |