The Top--Down Interpretation of Ultra--High Energy Cosmic Rays

Details The Top--Down Interpretation of Ultra--High Energy Cosmic Rays The Top--Down Interpretation of Ultra--High Energy Cosmic Rays

2003-10-29

arxiv.org/abs/hep-ph/0310331v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, 6 pages; invited talk at VHEPA-3, ICRR, Tokyo, March 2003

Scientific paper

The origin of Ultra--High Energy ($E \gsim 10^{20}$ eV) Cosmic Rays (UHECR) remains mysterious. I discuss ``top--down'' models, where UHECR originate from the decay of very massive, long--lived particles. I summarize the calculation of the spectrum of decay products, discuss possible problems with this scenario, and describe ways to test it by searching for very energetic neutrinos and neutralinos.

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