Longevity and Highest-Energy Cosmic Rays

Details Longevity and Highest-Energy Cosmic Rays Longevity and Highest-Energy Cosmic Rays

1997-09-10

arxiv.org/abs/astro-ph/9709080v1

Int.J.Mod.Phys. D8 (1999) 117-122

Astronomy and Astrophysics

Astrophysics

8 pages, RevTeX

Scientific paper

It is proposed that the highest energy $\sim 10^{20}$eV cosmic ray primaries
are protons, decay products of a long-lived progenitor which has propagated
from typically $\sim 100$Mpc. Such a scenario can occur in e.g. SU(15) grand
unification and in some preon models, but is more generic; if true, these
unusual cosmic rays provide a window into new physics.

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