Neutrino Astrophysics, from PeV to ZeV (with a little meV)

By Tom Weiler, Vanderbilt University

The neutrino is a unique messenger among high-energy cosmic quanta, in that all other known particles either bend, decay, or severely degrade in energy over cosmic distances. Consequently, several developing experiments have undertaken the search for astrophysical neutrino fluxes, both diffuse and source-resolved. Much particle-physics and astrophysics information is coded in the energy-spectrum, arrival directions, and even the flavor content of the arriving neutrinos. In this talk we illustrate with specific examples the promise which neutrino astronomy offers to study astrophysics and particle physics, and maybe even cosmology.