Speaker
Christian Weiss
(Jefferson Lab)
Description
Measurements of deep-inelastic scattering (DIS) on polarized light ions (deuteron, 3He, ...) address important physics topics such as the spin structure of the neutron, nuclear modifications of parton densities, and coherent effects at small x. Detection of the nuclear breakup state ("spectator tagging") reveals the nuclear configurations present during the high-energy process and permits a controled theoretical treatment of nuclear effects. Such measurements could be performed at a future Electron-Ion Collider (EIC) with suitable forward detectors. We report about recent progress in developing the theoretical framework for DIS on the polarized deuteron with spectator tagging at EIC. This includes (a) calculation of the final-state interactions in tagged DIS on the deuteron at large x using methods of light-front quantization [1]; (b) extraction of free neutron spin structure from tagged DIS using on-shell extrapolation; (c) novel studies of nuclear shadowing in diffractive tagged DIS at small x. We present suggestions for future
theoretical studies and experimental simulations for the EIC.
Primary author
Christian Weiss
(Jefferson Lab)
