Lower Energy Consequences of an Anomalous High-Energy Neutrino Cross-Section
Haim Goldberg, T. J. Weiler
Abstract
A new strong-interaction has been postulated for neutrinos above ~1019 eV to explain the production of highest-energy cosmic ray events. We derive a dispersion relation relating the hypothesized high-energy cross-section to the lower-energy neutrino-nucleon elastic amplitude. Remarkably, we find that the real forward amplitude becomes anomalous seven orders of magnitude lower in energy than does the total cross-section. We discuss possible measurable consequences of this early onset of new neutrino physics, and conclude that a significantly enhanced elastic ν-N scattering rate may occur for the neutrino beams available at Fermilab and CERN.
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