Abstract
Measurements are reported of the proton and deuteron spin structure functions and at beam energies of 29.1, 16.2, and 9.7 GeV, and and at a beam energy of 29.1 GeV. The integrals and were evaluated at fixed using the full data set to yield and The dependence of the ratio was studied and found to be small for Within experimental precision the data are well described by the twist-2 contribution, Twist-3 matrix elements were extracted and compared to theoretical predictions. The asymmetry was measured and found to be significantly smaller than the positivity limit for both proton and deuteron targets. is found to be positive and inconsistent with zero. Measurements of in the resonance region show strong variations with and consistent with resonant amplitudes extracted from unpolarized data. These data allow us to study the dependence of the integrals and below the scaling region.
- Received 13 February 1998
DOI:https://doi.org/10.1103/PhysRevD.58.112003
©1998 American Physical Society