Low Scale String Unification and the Highest Energy Cosmic Rays

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String unification at a scale of a few tens of TeV explains the existence of cosmic ray interactions beyond the Greisen-Zatsepin-Kuzmin (GZK) cutoff. Trans-GZK cosmic rays are neutrinos which can penetrate the cosmic microwave background. In interactions with atmospheric nuclei they have sufficient energy for exciting string modes. We present a model for the description of such interactions and discuss the properties of the resulting extensive air showers. Presently available data on trans-GZK cosmic rays suggest a string scale around 80 TeV.
8 pages, LaTeX

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High Energy Physics - Phenomenology

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http://salesiana.dossiersoluciones.com/handle/123456789/41823

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/hep-ph/0209162
 http://arxiv.org/abs/hep-ph/0209162

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arXiv