Accepted articles

On the 50th anniversary of the Institute for Nuclear Research of the Russian Academy of Sciences

Constraints on the models of the origin of high-energy astrophysical neutrinos

Institute for Nuclear Research, Russian Academy of Sciences, prosp. 60-letiya Oktyabrya 7a, Moscow, 117312, Russian Federation

The existence of astrophysical neutrinos with energies of dozens TeV and higher has been firmly established by the IceCube experiment; first confirmations of this discovery have been obtained by the ANTARES and Baikal-GVD installations. At the same time, observational results do not fully agree with those expected before the start of these experiments. The origin of the neutrinos is presently not determined, while simple theoretical models, popular for decades, cannot explain the entire ensemble of observational data. In the present review, a summary of experimental results is given with a particular emphasis on those most relevant for constraining theoretical models; features of various scenarios of the origin of high-energy neutrinos are discussed; and particular classes of their potential astrophysical sources are briefly listed. It is shown that observational data may be explained if the astrophysical neutrino flux includes both a contribution of extragalactic sources, dominant at high energies, and a Galactic component, essential only at neutrino energies

Keywords: neutrino, multimessenger astrophysics, high-energy astronomy
DOI: 10.3367/UFNe.2021.09.039062
Citation: Troitsky S V "Constraints on the models of the origin of high-energy astrophysical neutrinos" Phys. Usp., accepted

Received: 2nd, July 2021, revised: 7th, September 2021, 13th, September 2021

Оригинал: Троицкий С В «Ограничения на модели происхождения астрофизических нейтрино высоких энергий» УФН, принята к публикации; DOI: 10.3367/UFNr.2021.09.039062

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