27-29 June 2023
National Research Nuclear University MEPhI
Europe/Moscow timezone

Magnetorotational supernova neutrino emission spectra and prospects for observations by large-size underwater telescopes

27 Jun 2023, 15:00
B-100 (National Research Nuclear University MEPhI)


National Research Nuclear University MEPhI

Kashirskoe shosse 31, Moscow, Russian Federation, 115409
Original Talk Cosmic rays of very high energies (> 1 PeV) Cosmic rays of very high energies (> 1 PeV)


Vladimir Kondratyev (ОИЯИ)


We analyze neutrino fluxes near the surface of a protoneutron star in type II supernova explosions at core-collapse regime. For dynamoactive supernovae 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 a 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 √k when employing the k-fold coincidence technique in data processing.

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