Ultra high energy neutrino-nucleon cross section from cosmic ray experiments and neutrino telescopes
arXiv:hep-ph/0606311 · doi:10.1016/j.physletb.2006.09.067
Abstract
We deduce the cosmogenic neutrino flux by jointly analysing ultra high energy cosmic ray data from HiRes-I and II, AGASA and the Pierre Auger Observatory. We make two determinations of the neutrino flux by using a model-dependent method and a model-independent method. The former is well-known, and involves the use of a power-law injection spectrum. The latter is a regularized unfolding procedure. We then use neutrino flux bounds obtained by the RICE experiment to constrain the neutrino-nucleon inelastic cross section at energies inaccessible at colliders. The cross section bounds obtained using the cosmogenic fluxes derived by unfolding are the most model-independent bounds to date.
arXiv comment20 pages, 6 figures, 2 tables
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