arXiv:1109.2667·v1·High Energy Astrophysical Phenomena
Supernova neutrino signals by liquid Argon detector and neutrino magnetic moment
Takashi Yoshida (1) · Akira Takamura (2) · Keiichi Kimura (3) · Shio Kawagoe (1) · Toshitaka Kajino (1,4) · Hidekazu Yokomakura (3) · ((1) Univ. of Tokyo, (2) Toyota Coll. Tech., (3) Nagoya Univ., (4) NAOJ)
Abstract
We study electron-neutrino and electron-antineutrino signals from a supernova with strong magnetic field detected by a 100 kton liquid Ar detector. The change of neutrino flavors by resonant spin-flavor conversions, matter effects, and neutrino self-interactions are taken into account. Different neutrino signals, characterized by neutronization burst event and the total event numbers of electron-neutrinos and electron-antineutrinos, are expected with different neutrino oscillation parameters and neutrino magnetic moment. Observations of supernova neutrino signals by a 100 kton liquid Ar detector would constrain oscillation parameters as well as neutrino magnetic moment in either normal and inverted mass hierarchies.
Comments: 7 pages, 4 figures, 3 tables, accepted for publication in Physics Letters B