Roles of one-step process on neutrino scattering off C-12

초록

Neutrino (nu) (antineutrino ((nu) over bar)) scattering off C-12 in the energy range from a few to tens of MeV is one of key reactions for the nu-process in the nucleosynthesis of light nuclei, which usually assumes two-step process. Target nucleus is excited through various transitions by incident nu((nu) over bar), and subsequently decay into other nuclei with emitting particles. However, one-step process is also feasible, in which incident nu((nu) over bar) strips directly one nucleon from target nucleus. Consequently, the one-step process may affect abundances of C-11 and B-11 in addition to the two-step process. We investigate the one-step process in the nu((nu) over bar) quasi-elastic scattering off C-12 With inclusion of the final state interaction between outgoing nucleon and residual nucleus, and evaluate effects of the one-step process in the relevant cross sections. The one-step process turned out to be comparable to the two-step process and the amount could be sensitive on the FSI. (C) 2009 Elsevier B.V. All rights reserved.

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