Proton and Deuteron Spin Structure Function Measurements in the Resonance Region

Abstract

The RSS collaboration has measured the spin structure functions of the proton and the deuteron at Jefferson Lab using the Hall C HMS spectrometer, a polarized electron beam and a polarized solid target. The asymmetries A∥ and A⊥ were measured in the region of the nucleon resonances (0.82 GeV < W < 1.98 GeV) at an average four momentum transfer of Q2 = 1.3 GeV2. The extracted spin structure functions and their kinematic dependence will make a significant contribution in the study of higher‐twist effects and polarized duality tests. A description of the experiment and the latest findings of the analysis will be presented.