Ultra High Energy Cosmic Rays: Origin, Composition and Spectrum. (arXiv:1812.10750v1 [astro-ph.HE])
<a href="http://arxiv.org/find/astro-ph/1/au:+Aloisio_R/0/1/0/all/0/1">Roberto Aloisio</a>

The physics of Ultra High Energy Cosmic Rays will be reviewed, discussing the
latest experimental results and theoretical models aiming at explaining the
observations in terms of spectra, mass composition and possible sources. It
will be also discussed the emission of secondary particles such as neutrinos
and gamma rays produced by the interaction of Ultra High Energy Cosmic Rays
with astrophysical photon backgrounds.

The physics of Ultra High Energy Cosmic Rays will be reviewed, discussing the
latest experimental results and theoretical models aiming at explaining the
observations in terms of spectra, mass composition and possible sources. It
will be also discussed the emission of secondary particles such as neutrinos
and gamma rays produced by the interaction of Ultra High Energy Cosmic Rays
with astrophysical photon backgrounds.

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