Journal
REPORTS ON PROGRESS IN PHYSICS
Volume 80, Issue 5, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6633/aa5e6c
Keywords
neutrino-nucleus interaction; neutrino oscillation; many-body theory
Categories
Funding
- JSPS KAKENHI [JP25105010, JPT16K053540, JP25800149]
- [26104006]
- Grants-in-Aid for Scientific Research [25105010, 26104006, 25105004, 16K05354, 15K05072, 15K21734, 25105001, 25800149] Funding Source: KAKEN
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A precise description of neutrino-nucleus reactions will play a key role in addressing fundamental questions such as the leptonic CP violation and the neutrino mass hierarchy through analyzing data from next-generation neutrino oscillation experiments. The neutrino energy relevant to the neutrino-nucleus reactions spans a broad range and, accordingly, the dominant reaction mechanism varies across the energy region from quasi-elastic scattering through nucleon resonance excitations to deep inelastic scattering. This corresponds to transitions of the effective degree of freedom for theoretical description from nucleons through meson-baryon to quarks. The main purpose of this review is to report our recent efforts towards a unified description of the neutrino-nucleus reactions over the wide energy range; recent overall progress in the field is also sketched. Starting with an overview of the current status of neutrino-nucleus scattering experiments, we formulate the cross section to be commonly used for the reactions over all the energy regions. A description of the neutrino-nucleon reactions follows and, in particular, a dynamical coupled-channels model for meson productions in and beyond the Delta(1232) region is discussed in detail. We then discuss the neutrino-nucleus reactions, putting emphasis on our theoretical approaches. We start the discussion with electroweak processes in few-nucleon systems studied with the correlated Gaussian method. Then we describe quasi-elastic scattering with nuclear spectral functions, and meson productions with a Delta-hole model. Nuclear modifications of the parton distribution functions determined through a global analysis are also discussed. Finally, we discuss issues to be addressed for future developments.
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