Ultrahigh energy cosmic rays and new particle physics

Details Ultrahigh energy cosmic rays and new particle physics Ultrahigh energy cosmic rays and new particle physics

2000-11-13

arxiv.org/abs/astro-ph/0011231v1

Astronomy and Astrophysics

Astrophysics

14 pages, 5 figures. Invited talk at ``CAPP-2K'', Verbier, July 2000

Scientific paper

10.1063/1.1363517

The current status of the ultrahigh energy cosmic ray (UHE CR) enigma and several proposed solutions involving particle physics beyond the standard model are discussed. Emphasis is given to top--down models, and as a main example, supermassive dark matter as galactic source for UHE CR and the status of its experimental signatures (galactic anisotropy, chemical composition and clustering) is reviewed. Then different approaches to calculate fragmentation spectra of supermassive particles are discussed. Finally, it is argued that UHE neutrinos cannot be - neither directly or indirectly - responsible for the observed vertical air showers.

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