Measurements of the Q{sup 2}-Dependence of the Proton and Neutron SpinStructure Functions g{sub 1}{sup p} and g{sub 1}{sup n}
- SLAC
The structure functions g{sub 1}{sup p} and g{sub 1}{sup n} have been measured over the range 0.014 < x < 0.9 and 1 < Q{sup 2} < 40 GeV{sup 2} using deep-inelastic scattering of 48 GeV longitudinally polarized electrons from polarized protons and deuterons. The authors find that the Q{sup 2} dependence of g{sub 1}{sup p}(g{sub 1}{sup n}) at fixed x is very similar to that of the spin-averaged structure function F{sub 1}{sup p} (F{sub 1}{sup n}). From an NLO QCD fit to all available data they find Gamma{sub 1}{sup p}-Gamma{sub 1}{sup p} = 0.176 {+-} 0.003 {+-} 0.007 at Q{sup 2} = 5 GeV{sub 2}, in agreement with the Bjorken sum rule prediction of 0.182 {+-} 0.005.
- Research Organization:
- Stanford Linear Accelerator Center, Menlo Park, CA (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 763828
- Report Number(s):
- SLAC-PUB-7994
- Country of Publication:
- United States
- Language:
- English
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