The Nucleons go Two by Two: Studying Correlations with (e,e'pp)

Despite tremendous progress in recent years in measuring single nucleon momentum distributions in nuclei, two-nucleon momentum distributions remain largely unmeasured. Here we report on a measurement of 3He(e,e'pp)n that is primarily sensitive to the two-nucleon momentum distribution and relatively uncontaminated by final state rescattering or by two-body currents. We also look at the general sources and relative strengths of two- and three-nucleon knockout from nuclei