Ultra-high energy cosmic rays from decaying relic particles.

Details Ultra-high energy cosmic rays from decaying relic particles. Ultra-high energy cosmic rays from decaying relic particles.

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999nuphs..70..500b&link_type=abstract

Nuclear Physics B - Proceedings Supplements, vol. 70, issue 1-3, pp. 500-502

Physics

Nuclear Physics

Cosmic Rays: Clusters Of Galaxies, Cosmic Rays: Dark Matter

Scientific paper

The authors report on a recent proposal that particles produced by the decays of ultraheavy and quasistable X-particles constitute the ultra high energy cosmic rays (UHECR). These X-particles are assumed to constitute a tiny fraction ξx of cold dark matter in the Universe, with ξx being the same in the halo of our Galaxy and in the intergalactic space. The UHECR fluxes produced at the decays of X-particles are dominated by photons and nucleons from the halo of our Galaxy. Thus they do not exihibit the Greisen-Zatsepin-Kuz'min cutoff and the cascade limit is relaxed. The authors discuss the spectrum of produced extensive air showers and a signal from the Virgo cluster as signatures of this model.

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