Cosmic rays with energy around and in excess of 10(20) eV have been detected. Despite the uncertainties associated with the difficult measurements of extremely low fluxes (about a particle per square kilometer per century) the same existence of such high energy cosmic rays raises important questions that deserve an appropriate answer. I briefly summarize here what are these questions and how to look for the answers.
A window on the ultra-high energy universe
Blasi P
2005-01-01
Abstract
Cosmic rays with energy around and in excess of 10(20) eV have been detected. Despite the uncertainties associated with the difficult measurements of extremely low fluxes (about a particle per square kilometer per century) the same existence of such high energy cosmic rays raises important questions that deserve an appropriate answer. I briefly summarize here what are these questions and how to look for the answers.File in questo prodotto:
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