Origin of high-energy astrophysical neutrinos: new results and prospects

Abstract

High-energy neutrino astrophysics is rapidly developing, and in the last two years, new and exciting results have been obtained. Among them are the confirmation of the existence of the diffuse astrophysical neutrino flux by the new independent Baikal-GVD experiment, the discovery of the neutrino emission of our Galaxy, new confirmations of the origin of a part of astrophysical neutrinos in blazars, and much more. This brief review, based on the author's presentation at the session of the RAS Physical Science Division "Gamma quanta and neutrinos from space: what we can see now and what we need to see more", summarizes the results obtained since the publication of the review [1], and can be considered as a companion to it. CONTENTSemission 9 4.2. Comparison of analyses 10 4.3. Galactic diffuse neutrino and gamma-ray emission above 100 TeV 10 4.4. Galactic neutrino angular distribution 11 5. Prospects 12 5.1. Combating atmospheric backgrounds: high energies and high statistics 12 5.2. Fight for accuracy: detectors in liquid water 12 6. Conclusions 13 References 13 * To be published in Physics Uspekhi, Russian