%0 Journal Article
%T TeV Strings and the Neutrino-Nucleon Cross Section at Ultra-high Energies
%A F. Cornet
%A J. I. Illana
%A M. Masip
%J Physics
%D 2001
%I arXiv
%R 10.1103/PhysRevLett.86.4235
%X In scenarios with the fundamental unification scale at the TeV one expects string excitations of the standard model fields at accessible energies. We study the neutrino-nucleon cross section in these models. We show that duality of the scattering amplitude forces the existence of a tower of massive leptoquarks that mediate the process in the s-channel. Using the narrow-width approximation we find a sum rule for the production rate of resonances with different spin at each mass level. We show that these contributions can increase substantially the standard model neutrino-nucleon cross section, although seem insufficient in order to explain the cosmic ray events above the GZK cutoff energy.
%U http://arxiv.org/abs/hep-ph/0102065v3