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Updated: Jul 19, 2026

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 16, 2013
TeV strings and the neutrino-nucleon cross section at ultrahigh energies
F Cornet1, J I Illana, M Masip
1Departamento de Física Teórica y del Cosmos, Universidad de Granada, E-18071 Granada, Spain.
Abstract:
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 they seem insufficient to explain the cosmic ray events above the Greisen-Zatsepin-Kuz'min cutoff energy.
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