TeV strings and ultrahigh-energy cosmic rays
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AutorIllana, José I.
Illana, J.I. TeV strings and ultrahigh-energy cosmic rays. Acta Physica Polonica B, 32(11): 3695-3706 (2001). [http://hdl.handle.net/10481/32444]
PatrocinadorWork supported by MCYT, Junta de Andalucía and the European Union under contracts FPA2000-1558, FQM101 and HPRN-CT-2000-00149, respectively.
The origin and nature of ultrahigh-energy cosmic ray events, above the Greisen–Zatsepin–Kuzmin (GZK) cutoff energy, constitute a long-standing, unsolved mystery. 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.