Thinking, Observing And Mining The Universe: Proceedings Of by Gennaro Miele, Giuseppe Longo

By Gennaro Miele, Giuseppe Longo

Court cases of the overseas Conference,Sorrento, Italy 22-27 September 2003

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A. Kuzmin, Sov. Phys. JETP Lett. 4, 78 (1966). 2. M. , Phys. Rev. Lett. 81, 1163 (1998); M. , preprint astroph/9902239; N. , Phys. Rev. Lett. J. Bird et al. Astrophys J. 441, 144 (1995);Phys. Rev. Lett. 71, 3401 (1993); Astrophys. J. A. O. A. Watson, J. Phys. G. Nucl. Part. Phys. N. , Ref. Proc. International Symposium on Astrophysical Aspects of the Most Energetic Cosmic Rays, eds. M. Nagano and F. Takahara (World Scientific, Singapore, 1991), p. 20 3. T. Abu-Zayyad, et al, preprint astrc-ph/0208301; T.

As an example, in Fig. 2 I plot the expected spectra of UHECRs for the Auger (left panel) and EUSO (right panel) statistics of events, as simulated in 4 . 00 3 ' * ++ +ttt '+1+ Figure 2. Simulated spectra for the Auger (left) and EUSO (right) expected statistics of events as obtained in 2 . The injection spectrum used in Fig. 2 is E~2S, which fits the low energy (AGASA and HiRes) data in the case that there is no evolution of the source luminosity with the redshift. Even a comparison by eye of the AGASA data with these simulated spectra shows that the Auger and EUSO statistics are needed in order to finally settle the issue of the presence of the GZK feature and its detailed shape.

5. M. , Astrophys. J. 522, 225 (1999). 6. B. Finley, and S. Westerhoff, preprint astro-ph/0309159. 41 7. M. A. A. A. , and E. Zas, Phys. Rev. D 6 5 , 063007 (2002). 8. A. Watson, preprint astro-ph/0312475 (these proceedings). 9. V. Berezinsky, A. Z. Gazizov and S. Grigorieva, preprint astro-ph/0210095; V. Berezinsky, A. Z. Gazizov and S. Grigorieva, preprint hep-ph/0204357. 10. V. Berezinsky and S. Grigorieva, Astron. Astroph. 199, 1 (1988). 11. H. J. Weiler, Phys. rev. D64, 056008 (2001). 12. S.

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