Top-Down Models and Extremely High Energy Cosmic Rays

Kalashev, O. E.; Kuzmin, V. A.; Semikoz, D. V.

Top-Down Models and Extremely High Energy Cosmic Rays

Authors

Kalashev, O. E.

Kuzmin, V. A.

Semikoz, D. V.

Description

We developed numerical code for calculation of the extragalactic component of the spectra of leptons, nucleons and $γ$-rays resulting from ``top-down'' (non-acceleration) models for the case of uniform and isotropic source distribution. We explored two different classes of ``top-down'' scenarios: the wide earlier investigated class of X particles coming from collapse and/or annihilation of cosmic topological defects (such as cosmic strings, monopoles, etc.) and the models of super-heavy long-living X particles with lifetime of the order or much greater than the current Universe age.
9 pages, 4 postscript figures, made some corrections