Ultra high energy cosmic rays: A review
Todor Stanev

TL;DR
This review summarizes key findings on ultra-high-energy cosmic rays above 10^18 eV, focusing on their energy spectrum and composition, highlighting contradictions and open questions about their origins.
Contribution
It compiles and discusses recent experimental results from major observatories, emphasizing unresolved issues and the need for further research.
Findings
Contradictory results on cosmic ray composition
Uncertain origins of ultra-high-energy cosmic rays
Highlights of energy spectrum features
Abstract
We present the main results on the energy spectrum and composition of the highest energy cosmic rays of energy exceeding 10 eV obtained by the High Resolution Fly's Eye and the Southern Auger Observatory. The current results are somewhat contradictory and raise interesting questions about the origin and character of these particles.
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Taxonomy
TopicsAstrophysics and Cosmic Phenomena · Neutrino Physics Research · Particle Accelerators and Free-Electron Lasers
