Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-09-28
Phys.Rev. D59 (1999) 123006
Physics
High Energy Physics
High Energy Physics - Phenomenology
LaTeX, 9 pages
Scientific paper
10.1103/PhysRevD.59.123006
Cosmic rays of the highest energy, above the Greisen-Zatsepin-Kuzmin cut-off of the spectrum, may originate in decays of superheavy long-living X-particles. These particles may be produced in the early Universe from vacuum fluctuations during or after inflation and may constitute a considerable fraction of Cold Dark Matter. We calculate numerically their abundance for a wide range of models. X-particles are considered to be either bosons or fermions. Particles that are several times heavier than inflaton, m_inflaton \approx 10^{13} GeV, and were produced by this mechanism, can account for the critical mass in the Universe naturally. In some cases induced isocurvature density fluctuations can leave an imprint in anisotropy of cosmic microwave background radiation.
Kuzmin Andrei V.
Tkachev Igor I.
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