On Spectrum of Extremely High Energy Cosmic Rays through Decay of Superheavy Particles

1998/12/31 by Yūichi Chikashige, Chikashige, Yūichi, Jun-ichi Kamoshita +1
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #astro-ph #hep-ph

paper · pdf · doi:10.48550/arxiv.astro-ph/9812483

8 pages, including 3 figures

arxiv created 1998/12/31 · arxiv updated 2016/08/14

Abstract

We propose a formula for flux of extremely high energy cosmic rays (EHECR) through decay of superheavy particles. It is shown that EHECR spectrum reported by AGASA is reproduced by the formula. The presence of EHECR suggests, according to this approach, the existence of superheavy particles with mass of about 7 × 10¹¹GeV and the lifetime of about 10⁹ years. Possibility to obtain a knowledge of Ω₀ of the universe from the spectrum of EHECR is also pointed out.

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