Strongly Interacting Astrophysical Neutrinos

Details Strongly Interacting Astrophysical Neutrinos Strongly Interacting Astrophysical Neutrinos

2005-11-16

arxiv.org/abs/astro-ph/0511483v1

Prog.Part.Nucl.Phys.57:353-355,2006

Astronomy and Astrophysics

Astrophysics

3 pages, 2 figures, to appear in the proceedings of the Erice School/Workshop on Neutrinos, 2005

Scientific paper

10.1016/j.ppnp.2005.11.026

The origin and chemical composition of ultra high energy cosmic rays is still an open question in astroparticle physics. The observed large-scale isotropy and also direct composition measurements can be interpreted as an extragalactic proton dominance above the ankle at about 10^10 GeV. Photopion production of extragalactic protons in the cosmic microwave background predicts a cutoff at about 5x10^10 GeV in conflict with excesses reported by some experiments. In this report we will outline a recent statistical analysis (astro-ph/0506698) of cosmic ray data using strongly interacting neutrinos as primaries for these excesses.

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