Physics and origin of the highest energy events observed

Details Physics and origin of the highest energy events observed Physics and origin of the highest energy events observed

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..566...37b&link_type=abstract

OBSERVING ULTRAHIGH ENERGY COSMIC RAYS FROM SPACE AND EARTH: International Workshop. AIP Conference Proceedings, Volume 566, pp

Physics

Cosmic Rays, Elementary Particle Processes

Scientific paper

The detection of particles with energies above 1020 eV in giant airshowers continues to defy our attempts to understand them in physical terms. In this review I outline recent attempts to explain these events, usually as incoming protons. Options include decays of primordial particles, or interactions of decay products such as high energy neutrinos, Gamma Ray Bursts, pulsars, Lorentz invariance violation, and nearby radio galaxies. This last old proposal is the most mundane of all options, but also the most tested one. I will go through this last proposal in some detail, and clarify what work is there to do to prove or disprove it. At the end I put our current understanding of where cosmic rays at all energies come from into a skeptical synopsis. The new airshower detector systems which cover the Southern sky, AUGER and EUSO will provide the most critical tests. .

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