Ultra high-energy cosmic ray proton interactions

Details Ultra high-energy cosmic ray proton interactions Ultra high-energy cosmic ray proton interactions

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009phlb..678...60w&link_type=abstract

Physics Letters B, Volume 678, Issue 1, p. 60-64.

Physics

5

Cosmic-Ray Interactions, Composition, Energy Spectra And Interactions, Extensive Air Showers, Cosmic Rays

Scientific paper

The recent Auger results suggest that the coincidences of arrival directions with ‘nearby’ AGN, and the HiRes discovery of the GZK cut-off, indicate protons to be at least the strongly dominant component of primary extra galactic cosmic ray flux. The measured longitudinal extensive air shower propagation characteristics, however, indicate at least a mixed composition, if the conventional interaction model is correct. For the present work we assume that the particles are indeed protons and examine the consequences for the high-energy interaction physics. We have found that such a supposition requires strong violation of the so-called Feynman scaling.

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