Acceleration and propagation of ultra high energy cosmic rays

Abstract

We review the physics of the highest energy cosmic rays. The discovery of their sources, still unknown, will reveal the most energetic astrophysical objects in the universe and could unveil new physics beyond the standard model of particle physics. We discuss the details of propagation of these high energy particles, their interaction with astrophysical photon backgrounds and intergalactic magnetic fields, and the production of secondary cosmogenic particles associated to their transport. We examine different models of acceleration, reviewing the principal astrophysical objects that could energise cosmic rays until the highest energies. Given the uncertainties in the observed mass composition, we review the two alternative scenarios of a composition made only by protons or by protons and heavier nuclei; discussing the consequences of the two scenarios in terms of sources, acceleration mechanisms and production of secondary cosmogenic gamma rays and neutrinos.

Solicited review paper accepted for publication by Progress of Theoretical and Experimental Physics. 40 pages, 20 figures. arXiv admin note: substantial text overlap with arXiv:1707.06147

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Cited by in corpus (7)

• Active Galactic Nuclei as potential Sources of Ultra-High Energy Cosmic Rays
• Mass Composition of UHECRs from $X_{\max }$ Distributions Recorded by the Pierre Auger and Telescope Array Observatories
• Magnetic Suppression of Cosmic Rays' Flux in $\mathbf{f}(\mathbf{R})$ and $\mathbf{f}(\mathbf{Q})$ Theories of Gravity
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• UHECRs Propagation and their Multimessengers: Upper limits and the Impact of the Extragalactic Magnetic Field
• Ultra-high energy cosmic rays with UFA-15 source model in Bumblebee gravity theory
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