Abstract
We analyze neutrino fluxes near the surface of a protoneutron star in type II supernova explosions. For magnetorotational explosion mechanism it is shown that effective neutrino collisions in a magnetized nucleon gas caused by the neutral current Gamow–Teller component lead to neutrino acceleration. Such an effect originates from spin-projection asymmetry in phase space volume of outer channel neutrino due to nucleon magnetic moment interaction with magnetic field. Respective increase in a hardness of the energy spectrum is favorable for observations of supernova neutrinos using neutrino telescopes. The possibilities of detecting supernova neutrinos by large-volume Cherenkov observatories—KM3NeT and Baikal-GVD—are discussed. As is demonstrated the upper limits of the distance thresholds for such observations can be increased by a factor of \((1.5\sqrt{k}-1/4)\), when employing the \(k\)-fold coincidence technique in data processing.
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Kondratyev, V.N. Magnetorotational Supernova Neutrino Emission Spectra and Prospects for Observations by Large-Size Underwater Telescopes. Phys. Atom. Nuclei 86, 1083–1089 (2023). https://doi.org/10.1134/S106377882401023X
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DOI: https://doi.org/10.1134/S106377882401023X