Superheavy dark matter and ultrahigh energy cosmic rays
Abstract
The phase of inflationary expansion in the early universe produces superheavy relics in a mass window between 1012 GeV and 1014 GeV. Decay or annihilation of these superheavy relics can explain the observed ultrahigh energy cosmic rays beyond the Greisen-Zatsepin-Kuzmin cutoff. We emphasize that the pattern of cosmic ray arrival directions with energies beyond 20 EeV will decide between the different proposals for the origin of ultrahigh energy cosmic rays.
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