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Ultrahigh-energy cosmic-ray spectrum
Abstract
We analyze the evolution of the ultrahigh-energy cosmic-ray spectrum upon traversing the 2.7 \ifmmode^\circ\else\textdegree\fi{}K microwave background with respect to pion photoproduction, pair-production reactions, and cosmological effects. Our approach employs exact transport equations which manifestly conserve nucleon number and embody the laboratory details of these reactions. A spectrum enhancement appears around 6\ifmmode\times\else\texttimes\fi{}${10}^{19}$ eV due to the ``pile-up'' of energy-degraded nucleons, and a ``dip'' occurs around ${10}^{19}$ eV due to combined effects. Both of these features appear in the observational spectrum. We analyze the resulting neutrino spectrum and the effects of cosmological source distributions. We present a complete model of the ultrahigh-energy spectrum and anisotropy in reasonable agreement with observation and which predicts an observable electron-neutrino spectrum.
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Citations
Cited by
High-energy tests of Lorentz invariance
Coleman, S., & Glashow, S. L. (1999) · Physical Review D · doi:10.1103/physrevd.59.116008 · Cited by 1,149
Cosmic physics: the high energy frontier
Stecker, F. W. (2003) · Journal of Physics G: Nuclear and Particle Physics · doi:10.1088/0954-3899/29/10/201 · Cited by 48
Metadata
- Authors
- Hill, C. T., & Schramm, D. N.
- Venue
- Physical Review D
- Publisher
- American Physical Society (APS)
- Published
- 1985-02-01
- Volume
- 31
- Issue
- 3
- Pages
- 564-580
- ISSN
- 0556-2821 (ISSN-L)
- OpenAlex
- W2104948382
- Cited by
- 236
- References
- 0
- FWCI
- 3.26
- Type
- journal article
- Language
- en
- Open access
- closed
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- Hill, C. T., & Schramm, D. N. (1985). Ultrahigh-energy cosmic-ray spectrum. Physical Review D. https://doi.org/10.1103/physrevd.31.564
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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