Report on scipost_201910_00013v1

Abstract

Electron-induced proton, neutron and deuteron knock-out remains the most versatile probe of the electro-magnetic properties and spin structure of light nuclei. The advent of highly polarized beams and targets and improvements in recoil polarization methods, as well as analysis and simulation techniques, have enabled us to study the static and dynamical properties of few-body systems with unprecedented precision. Recent experiments at Jefferson Lab and MAMI are presented and put into perspective of state-of-the art Faddeev calculations, with focus on the 3 He nucleus. SciPost Physics ProceedingsSubmission Newport News, USA, or at the MAMI Accelerator Facility in Mainz, Germany. In this paper we present the results of a select list of the most relevant recent experiments: TJNAF E05-102, dedicated to the measurement of double-spin asymmetries in the 3 He( e, e d)p, 3 He( e, e p)d and 3 He( e, e p)pn processes in the quasi-elastic region; the TJNAF E05-015, whose main goal was the determination of target single-spin asymmetry in the quasi-elastic 3 He ↑ (e, e ) process; the TJNAF E08-005 in which we studied target single-spin asymmetries in quasi-elastic 3 He ↑ (e, e n) and double-spin asymmetries in quasi-elastic 3 He( e, e n); and the MAMI Project 'N' with the first-ever attempt to investigate the triple-polarized process 3 He( e, e p) in order to study the spin-dependent distribution of polarized pd clusters in 3 He. The 3 He nucleus is indeed the playground for tests of few-body nuclear dynamics [1, 2], but lately 2 H and 12 C have also received renewed attention due to their relevance for the study of medium modifications of elastic form-factors of nucleons; here we outline our efforts to determine the single-spin asymmetries in 12 C(e ↑ , e ) as well as recoil polarizations in 2 H( e, e p) and 12 C( e, e p) processes.