Neutrino-nucleus reactions on $^{16}$O based on new shell-model Hamiltonians

Understand

Neutrino-induced reactions on $^{16}$O are investigated by shell-model calculaions with new shell-model Hamiltonians, which can describe well the structure of $p$-shell and $p$-$sd$ shell nuclei.

• Distribution of the spin-dipole strengths in $^{16}$O, which give major contributions to the $\nu$-$^{16}$O reaction cross sections, is studied with the new Hamiltonians.
• Muon-capture reaction rates on $^{16}$O are also studied to discuss the quenching of the axial-vector coupling in nuclear medium.
• Charged-current and neutral-current reaction cross sections are evaluated in various particle and $\gamma$ emission channels as well as the total ones at neutrino energies up to $E_{\nu}\approx$ 100 MeV.