Ultra High Energy Cosmic Rays - an Enigma

Details Ultra High Energy Cosmic Rays - an Enigma Ultra High Energy Cosmic Rays - an Enigma

Mar 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001ppu..conf..183w&link_type=abstract

PARTICLE PHYSICS AND THE UNIVERSE. Proceedings of Nobel Symposium 109. Held 20-25 August 1998 in Haga Slott, Enköping, Sweden. E

Physics

Cosmic Rays

Scientific paper

The methods of detection of high energy cosmic rays are briefly described and it is shown that results on the energy spectrum and arrival distribution above 4 × 1019 eV confound theoretical expectation. Some of the ideas which have been put forward to explain the data are outlined. There is an urgent need for better statistics as only about 12 events above 1020 eV have so far been detected. Furthermore the limit to the energy which cosmic rays can have is not known. In addition to the Pierre Auger Observatory, which is briefly described, the Hi-Res fluorescence detector is about to take data and an ambitious satellite observatory (Airwatch/OWL) is under discussion.

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