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TeV Strings and Ultrahigh-Energy Cosmic Rays

Jose I. Illana
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Abstract

The origin and nature of ultrahigh-energy cosmic ray events, above the Greisen-Zatsepin-Kuzmin (GZK) cutoff energy, constitute a long-standing, unsolved mistery. Neutrinos are proposed candidates but their standard interactions with matter are too weak. In the context of a TeV-scale string theory, motivated by possible extra space dimensions, the neutrino-nucleon scattering is examined. Resonant string contributions increase substantially the standard model neutrino-nucleon cross section. Although they seem insufficient to explain the trans-GZK cosmic ray events, their effects might be detected in next experiments.

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Jose I. Illana. 2001-10-09. TeV Strings and Ultrahigh-Energy Cosmic Rays. https://arxiv.org/abs/hep-ph/0110092

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