The LAD Experiment: measuring medium-modification using spectator-tagged deep inelastic scattering

The EMC Effect, the modification of the structure of bound nucleons relative to free nucleons, has been a major open puzzle in nuclear physics for almost 40 years. While there are several tenable hypotheses about the effect's orgin, the hypothesis that structure modification is driven by high-virtuality nucleons in short-range correlated pairs makes a testable prediction---modification should increase with virtuality. The upcoming LAD experiment at Jefferson Lab Hall C will test this prediction using the technique of spectator-tagged deep inelastic scattering (DIS) on deuterium. A Large-Acceptance Detector (LAD) composed of GEMs and scintillators will tag spectator protons from DIS on bound neutrons, providing a connection between the initial state of the deuteron, and the quark momentum distribution. LAD will cover a range of kinematics from parallel to perpendicular, which can help elucidate the effects final state interactions. The LAD experiment and its connection to recent experimental and theoretical results will be presented.