High-Energy and Ultra-High-Energy Neutrinos

TL;DR

High-energy and ultra-high-energy neutrinos serve as powerful tools for exploring fundamental physics and astrophysical sources, providing insights into phenomena beyond the reach of electromagnetic observations.

Contribution

This paper reviews the potential of astrophysical neutrinos for probing physics beyond the Standard Model and understanding extreme cosmic sources.

Findings

Neutrinos probe physics from TeV to EeV scales.

They provide unique insights into opaque astrophysical regions.

Neutrino observations complement electromagnetic astronomy.

Abstract

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 ultra-high-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.