Please use this identifier to cite or link to this item:
Scopus Web of Science® Altmetric
Type: Journal article
Title: Asymmetry in the neutrino and anti-neutrino reactions in a nuclear medium
Author: Cheoun, M.
Choi, K.
Kim, K.
Saito, K.
Kajino, T.
Tsushima, K.
Maruyama, T.
Citation: Physics Letters B: Nuclear Physics and Particle Physics, 2013; 723(4-5):464-469
Publisher: Elsevier Science BV
Issue Date: 2013
ISSN: 0370-2693
Statement of
Myung-Ki Cheoun, Ki-Seok Choi, K.S. Kim, Koichi Saito, Toshitaka Kajino, Kazuo Tsushima and Tomoyuki Maruyama
Abstract: We study the effect of the density-dependent axial and vector form factors on the electron-neutrino (νe) and anti-neutrino (ν-e) reactions for a nucleon in nuclear matter or in 12C. The nucleon form factors in free space are presumed to be modified for a bound nucleon in a nuclear medium. We adopt the density-dependent form factors calculated by the quark-meson coupling (QMC) model, and apply them to the νe and ν-e induced reactions with the initial energy E=8-80MeV. We find that the total νe cross sections on 12C as well as on a nucleon in nuclear matter are reduced by about 5% at the nuclear saturation density, ρ0. This reduction is caused by the modification of the nucleon structure in matter. Although the density effect for both cases is relatively small, it is comparable with the effect of Coulomb distortion on the outgoing lepton in the ν-reaction. In contrast, the density effect on the ν-e reaction reduces the cross section significantly in both nuclear matter and 12C cases, and the amount maximally becomes of about 35% around ρ0. Such large asymmetry in the νe and ν-e cross sections, which seems to be nearly independent of the target, is originated from the differences in the helicities of ν-e and νe. It is expected that the asymmetry influences the r-process and also the neutrino-process nucleosynthesis in core-collapse supernovae. © 2013 Elsevier B.V.
Rights: © 2013 Elsevier B.V. All rights reserved.
DOI: 10.1016/j.physletb.2013.05.050
Grant ID:
Published version:
Appears in Collections:Aurora harvest 4
Chemistry and Physics publications

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.