The Decay of Dark-Matter Inflatons Can Produce Very Energetic Cosmic Rays

Details The Decay of Dark-Matter Inflatons Can Produce Very Energetic Cosmic Rays The Decay of Dark-Matter Inflatons Can Produce Very Energetic Cosmic Rays

1998-06-17

arxiv.org/abs/astro-ph/9806237v2

Nuovo Cim. A112 (1999) 1463-1468

Astronomy and Astrophysics

Astrophysics

6 pages including 2 eps-figures. Final version with some misprints corrected

Scientific paper

We have shown that inflatons with a mass which is calculated to be of the order of $10^{10}\GeV$ can constitute a dominant part of dark matter. They can decay uniquely into a neutrino and antineutrino with a lifetime calculated to be greater than the present age of the universe. We show here that these neutrinos can give rise to a localized bump in the primary energy spectrum of extensive air showers. The structure would appear above the sharply-falling spectrum at the expected GZK cut-off energy for primary protons $\sim 5\times 10^{19}\GeV$. The flux which is necessary to compensate for the small cross section is, in principle, attainable, with distant structures also as possible significant sources, and such events might be observed in present experiments.

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