Neutrino nucleus scattering

Original · EN

The status of the theoretical description of neutrino-nuclear interaction for low and intermediate energies is reviewed and its result compared with the existing data. Particular emphasis is on ¹²C, the ingredient of liquid scintillator, and on ¹⁶ the main component of the water Čerenkov detectors. First, I show that the data on the exclusive process populating the ground state of ¹²N are well reproduced by the theory. This is also the case for the excitation of the continuum with low energy neutrinos from the muon decay at rest and for the muon capture. However, for not yet understood reasons, the theory overestimates the cross section for higher energy neutrinos from the pion decay in flight, by up to 50%. I also show that the Continuum Random Phase Approximation and the Relativistic Fermi Gas model give very similar full and differential cross sections for the neutrino energies of several hundred MeV, thus checking one method against the other.