High-energy and ultra-high-energy neutrinos: A Snowmass white paper

Astrophysical neutrinos are excellent probes of astroparticle physics and high-energy physics. With energies far beyond solar, supernovae, atmospheric, and accelerator neutrinos, high-energy and ultrahigh-energy neutrinos probe fundamental physics from the TeV scale to the EeV scale and beyond. They are sensitive to physics both within and beyond the Standard Model through their production mechanisms and in their propagation over cosmological distances. They carry unique information about their extreme non-thermal sources by giving insight into regions that are opaque to electromagnetic radiation. This white paper describes the opportunities astrophysical neutrino observations offer for astrophysics and high-energy physics, today and in coming years. (C) 2022 Elsevier B.V. All rights reserved.

Automated summary

Astrophysical neutrinos are important for studying astrophysics and high-energy physics. They have high energies and can probe fundamental physics at scales ranging from the TeV scale to the EeV scale and beyond. By studying their production mechanisms and propagation, we can gain insights into physics within and beyond the Standard Model. Neutrinos also provide unique information about extreme non-thermal sources in regions opaque to electromagnetic radiation.