Measurement of the Proton and Deuteron Spin Structure Function g1 in the Resonance Region
Abstract
We have measured the proton and deuteron spin structure functions gp1 and gd1 in the region of the nucleon resonances for W2<5 GeV2 and Q2~=0.5 and Q2~=1.2 GeV2 by inelastically scattering 9.7 GeV polarized electrons off polarized 15NH3 and 15ND3 targets. We observe significant structure in gp1 in the resonance region. We have used the present results, together with the deep-inelastic data at higher W2, to extract γ\(Q2\)≡1 g1\(x,Q2\)dx. This is the first information on the low- Q2 evolution of γ toward the Gerasimov-Drell-Hearn limit at Q2 = 0.
- Publication:
-
Physical Review Letters
- Pub Date:
- February 1997
- DOI:
- 10.1103/PhysRevLett.78.815
- arXiv:
- arXiv:hep-ex/9701004
- Bibcode:
- 1997PhRvL..78..815A
- Keywords:
-
- High Energy Physics - Experiment
- E-Print:
- 7 pages, 2 figures