TeV Strings and Ultrahigh-Energy Cosmic Rays

Details TeV Strings and Ultrahigh-Energy Cosmic Rays TeV Strings and Ultrahigh-Energy Cosmic Rays

2001-10-05

arxiv.org/abs/hep-ph/0110092v2

Acta Phys.Polon. B32 (2001) 3695-3706

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, LaTeX, 2 figures; talk presented at the XXV International School of Theoretical Physics, Ustron, Poland, September 1

Scientific paper

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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