Speaker
Description
In spectator tagged DIS on nuclei, products of nuclear breakup are detected. This is an example of SIDIS in the target fragmentation region. Methods of light-front quantization are employed to separate nuclear and nucleonic structure in the high-energy process and achieve a composite description.
The light-front wave function of the polarized deuteron is matched with a rotationally covariant 3-dimensional wave function in the center-of-mass frame of the $NN$ system. The polarized tagged cross section is computed in the impulse approximation. The effective polarization of the active nucleon is determined by the deuteron polarization and the detected spectator momentum ($S/D$ wave ratio).
Predictions for polarization observables (various vector & tensor asymmetries) are given, and their dependence on the nuclear structure model is studied. Measurements of these tagged observables are especially suited for colliders with far-forward detectors and could be performed at the EIC with an accelerator upgrade that allows for polarized deuterons.