Detecting Neutrinos from AGNs and Topological Defects with Neutrino Telescopes

Abstract

We evaluate neutrino-nucleon cross section for energies up to $10^{21}eV$ in light of new information on the small-$x$ behavior of parton distributions. We give predictions for large underground neutrino telescope event rates for ultrahigh-energy neutrinos from Active Galactic Nuclei and from the decay of topological defects formed in the early Universe.

Comments: Talk presented by I. Sarcevic at Annual Meeting of Division of Particles and Fields of the APS (DPF'96), Minneapolis, MN, August 10-15, 1996, 3 pp