Ju n 20 04 No ’ cut off ’ in the High Energy Cosmic Ray Energy Spectrum


It is often claimed that there should be a ’GZK cut-off” in the flux of extragalactic cosmic rays, arising from interactions between the cosmic rays and the cosmic micro-wave background photons (e.g. 1 and 2). Some experiments (3 and 4) show particles of even higher energy than this value and this has led to claims for exotic processes (e.g. 5 and 6). We… (More)

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