Particle Candidates of Ultrahigh Energy Cosmic Rays

Details Particle Candidates of Ultrahigh Energy Cosmic Rays Particle Candidates of Ultrahigh Energy Cosmic Rays

2001-07-09

arxiv.org/abs/hep-ph/0107095v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, LaTex. Substantially revised to take into account the discussion at HEP2001, Budapest July 2001

Scientific paper

We discuss candidates for trans-GZK cosmic rays observed in a variety of detectors. Three types of primaries are represented among the abstracts submitted to this meeting: neutrin os causing a Z-burst, protons arising from the decay of ultra-heavy metastable particles and neutrinos within the framework of low scale string-like models of unification. We attempt to evaluate the relative merits of these schemes. No definite conclusion can be reached at this time. However, we point out that some schemes are more credible/predictive than others. Data to be gathered by the Pierre Auger observatories as well as orbiting detectors (OWL, Airwatch...) should be able to decide between the various schemes.

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