X iv : a st ro - p h / 04 07 31 1 v 1 1 5 Ju l 2 00 4 Ultrahigh Energy Cosmic Rays : Old Physics or New Physics ?
نویسنده
چکیده
We consider the advantages of and the problems associated with hypotheses to explain the origin of ultrahigh energy cosmic rays (UHECR: E > 10 EeV) and the " trans-GZK " cosmic rays (TGZK: E > 100 EeV) both through " old physics " (acceleration in cosmic sources) and " new physics " (new particles, topological defects, fat neutrino cross sections, Lorentz invariance violation).
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تاریخ انتشار 2004