CFNS Seminar

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. We report about an on-going
effort to develop the theoretical and experimental methods for spectator tagging with the deuteron
at EIC. This includes (a) the description of nuclear structure and breakup in DIS using methods
of light-front quantization; (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;
(d) the forward detector and ion beam requirements for spectator tagging at EIC. We present
suggestions for future physics studies and detailed process simulations.