Neutrino Process in Core-collapse Supernovae with Neutrino Self-interaction and MSW Effects
Heamin Ko, Myung-Ki Cheoun, Eunja Ha, Motohiko Kusakabe, Takehito Hayakawa, Hirokazu Sasaki, Toshitaka Kajino, Masa‐aki Hashimoto, M. Ono, M. D. Usang, Satoshi Chiba, Ko Nakamura, Alexey Tolstov, K. Nomoto, Toshihiko Kawano, Grant J. Mathews
Abstract
Abstract We calculate the abundances of 7 Li, 11 B, 92 Nb, 98 Tc, 138 La, and 180 Ta produced by neutrino ( ν )-induced reactions in a core-collapse supernova explosion. We consider the modification by ν self-interaction ( ν -SI) near the neutrinosphere and the Mikheyev–Smirnov–Wolfenstein (MSW) effect in the outer layers based on time-dependent neutrino energy spectra. Abundances of 7 Li and the heavy isotopes 92 Nb, 98 Tc, and 138 La are reduced by a factor of 1.5–2.0 by the ν -SI. In contrast, 11 B is relatively insensitive to the ν -SI. We find that the abundance ratio of heavy to light nuclei, 138 La/ 11 B, is sensitive to the neutrino mass hierarchy, and the normal mass hierarchy is more likely to be consistent with the solar meteoritic abundances.