Abstract
We reviewed present status regarding experimental data and theoretical approaches for neutrino-induced reactions and neutrino scattering. With a short introduction of relevant data, our recent calculations by distorted-wave Born approximation for quasielastic region are presented for MiniBooNE data. For much higher energy neutrino data, such as NOMAD data, elementary process approach was shown to be useful instead of using complicated nuclear models. But, in the low energy region, detailed nuclear structure model, such as QRPA and shell model, turn out to be inescapable to explain the reaction data. Finally, we discussed that one step-process in the reaction is comparable to the two-step process, which has been usually used in the neutrino-nucleosynthesis.
Highlights
The neutrino (ν) is one of the most elusive particles in modern physics
We mainly focus on the neutrino produced in the accelerator, in particular, LSND [2], MiniBooNE [3, 4] and NOMAD [5] data
In nuclear physics, ν–nucleus (ν–A) scattering has become an essential tool for studying interesting weak-interaction physics, such as strangeness content in nucleons and matter distributions probed by Z0 bosons which was analyzed by parity-violating electron scattering [6, 7]
Summary
The neutrino (ν) is one of the most elusive particles in modern physics. But, nowadays many sources of the neutrino are known and available in the laboratory, whose energy range are located from a few MeV to a few TeV region [1]. The MiniBooNE data addressed the fact that the experimental data are governed by the value of axial mass MA = 1.39 ∼ 1.35 GeV which is larger than the standard value MA = 1.03 GeV and the strange axial form factor, i.e. gAs = 0.08 at Q2 = 0, there are many issues that remain unresolved [12] One of these involves the in-medium effect due to the embedded nucleon in a nucleus. Our recent calculations [18, 19] by the distorted wave Born approximation (DWBA) and the quasi-particle random phase approximation (QRPA) [20] showed that differential cross sections for the neutrino-induced reaction in 12C by an Eν of less than 100 MeV may be altered by about 20 ∼ 30 % by the in-medium effect In these calculations, we exploited the density-dependent weak form factors estimated in the quark-meson-coupling model (QMC) [21]. Importance of the one-step process is discussed with the results by the QRPA calculation
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