Neutrinos in Nuclear Physics: RPA, MEC, 2p2h (Pionic Modes of Excitation in Nuclei)

Abstract

This chapter is devoted to the study of weak interactions on nucleons and nuclei. I pay a special attention to the study of neutrino and antineutrino quasi-elastic reactions in nucleiQuasi-elastic reactions in nuclei , which are of the greatest importance for neutrino oscillation experiments, and crucial to achieve the precision goals required to make new discoveries, like the CP violation in the leptonic sector, possible. In particular, I discuss RPA correlations and 2p2h (multi-nucleon) effectsRPA correlations and 2p2h (multi-nucleon) effects on charged-current neutrino-nucleus reactions, and the influence of these nuclear effects on the recently measured MiniBooNE flux folded differential cross sections, and on the so-called nucleon axial mass puzzle. The modification of the nucleon-nucleon interaction inside of a nuclear mediumNucleon-nucleon interaction inside of a nuclear medium , specially in the spin-isospin channel, will be also studied, since it plays a central role in understanding these nuclear effects. Other physical processes involving electrons and muons which are sensitive to this part of the interaction are also discussed, underlying the importance of the medium correctionsMedium corrections also in these systems.