Speaker
Description
The deuteron has a unique feature called tensor polarization, which cannot be obtained by simply combining of the proton and neutron properties and provides access to new tensor structure functions that reflect genuine nuclear effects arising from QCD dynamics, showing how quarks and gluons are modified by binding and spin correlations in a spin-1 nucleus. These functions provide a three-dimensional picture of how quark momentum and spin are distributed inside the deuteron. Recent advances in polarized target technology now allow high tensor polarization, making such measurements feasible for the first time with good precision. This talk discusses how semi-inclusive deep inelastic scattering (SIDIS) on a tensor polarized deuteron can be used to study the internal structure of a spin-1 nucleus. By detecting both the scattered electron and a produced hadron, SIDIS provides access to the three-dimensional momentum structure of quarks, including their longitudinal and transverse motion. We describe the experimental strategy at Jefferson lab and show how SIDIS measurements of a tensor polarized deuteron open a new window into the dynamics of quarks inside nuclei.
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