Physics – Nuclear Physics
Scientific paper
Nov 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004nuphs.136..179w&link_type=abstract
Nuclear Physics B, Volume 136, p. 179-184.
Physics
Nuclear Physics
3
Scientific paper
An analysis is given of several aspects of the relationship between Cosmic Rays and Cosmology. These include the possibility of foreground effects on the CMB due to CR interactions in various locations. The form of the fractional energy loss rate of protons and iron nuclei propagating through the various radiation fields is examined and the importance of the infra-red radiation field in certain cosmic ray production scenarios is stressed. All the available measurements of the energy spectrum of the highest energy particles are taken and a best-estimate is derived. Comparison is made with predictions for alternative assumptions about the origin and nature of the primary particles. It is concluded that there is no need to involve exotic mechanisms for the particles beyond the ‘GZK cut-off’; indeed, it is claimed that with a sufficiently hard production spectrum a ‘cut-off’- is not expected. In fact, it is maintained that the term ‘cut-off’ is a misnomer. This is not to say that there is no interest in the particles of the very highest energies; there is the mechanisms whereby these particles attain their energies is a great mystery.
Wibig Tadeusz
Wolfendale Arnold W.
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