Ultrahigh-energy cosmic rays, superheavy long-lived particles, and matter creation after inflation

  • V. A. Kuzmin
  • I. I. Tkachev


Cosmic rays of the highest energy, above the Greisen-Zatsepin-Kuzmin (GZK) cutoff of the spectrum, may originate in decays of superheavy long-lived particles. We conjecture that these particles may be produced naturally in the early Universe from vacuum fluctuations during inflation and may constitute a considerable fraction of cold dark matter. We predict a new cutoff in the ultrahigh-energy cosmic ray spectrum Ecutoff<minflaton≈1013 GeV, the exact position of the cutoff and the shape of the cosmic ray spectrum beyond the GZK cutoff being determined by the QCD quark/gluon fragmentation. The Pierre Auger Project installation may in principle observe this phenomenon.

PACS numbers

98.70.Sa 95.85.Ry 


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Copyright information

© MAIK "Nauka/Interperiodica" 1998

Authors and Affiliations

  • V. A. Kuzmin
    • 1
  • I. I. Tkachev
    • 1
    • 2
  1. 1.Institute for Nuclear ResearchRussian Acadmey of SciencesMoscowRussia
  2. 2.Institute for Nuclear ResearchRussian Acadmey of SciencesMoscowRussia

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