TeV Strings and the Neutrino-Nucleon Cross Section at Ultra-high Energies

Details TeV Strings and the Neutrino-Nucleon Cross Section at Ultra-high Energies TeV Strings and the Neutrino-Nucleon Cross Section at Ultra-high Energies

2001-02-06

arxiv.org/abs/hep-ph/0102065v3

Phys.Rev.Lett. 86 (2001) 4235-4238

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 1 figure, version to appear in PRL

Scientific paper

10.1103/PhysRevLett.86.4235

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.

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