Spin-Dependent DIS from Polarized ³He at EIC

الأصل · EN

A day-1 EIC detector should be prepared to carry out inclusive DIS measurements from electron collisions with nucleon and nuclear beams. Here I consider the scientific motivation for spin-dependent DIS measurements from a polarized ³He beam. Longitudinally polarized ³He ions can be used to measure gⁿ₁(x,Q²) in purely inclusive scattering. I also consider spin-dependent DIS from polarized ³He by tagging the spectator proton or deuteron in coincidence with the scattered electron. A calculation of high energy scattering from the polarized ³He nucleus in the EIC frame is motivated. Further, this type of measurement can be extended to other polarized few-body nuclei. High energy spin-dependent scattering from polarized ³He with tagged proton and deuteron could be studied experimentally ahead of EIC using spin-dependent proton-³He scattering in RHIC, when polarized ³He ions become available.