Measurement of the Proton and Deuteron Spin Structure Functions g2 and Asymmetry A2
We have measured the spin structure functions g{sub 2}{sup p} and g{sub 2}{sup d} and the virtual photon asymmetries A{sub 2}{sup p} and A{sub 2}{sup d} over the kinematic range 0.02 < x <0.8 and 1.0 < Q{sup 2} < 30 (GeV/c){sup 2} by scattering 38.8 GeV longitudinally polarized electrons from transversely polarized NH{sup 3} and {sup 6}LiD targets. The absolute value of A{sub 2} is significantly smaller than the {radical}R positivity limit over the measured range, while g{sub 2} is consistent with the twist-2 Wandzura-Wilczek calculation. We obtain results for the twist-3 reduced matrix elements d{sub 2}{sup p}, d{sub 2}{sup d} and d{sub 2}{sup n}. The Burkhardt-Cottingham sum rule integral g{sub 2}(x)dx is reported for the range 0.02 {le} x {le} 0.8.
- 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:
- 9948
- Report Number(s):
- SLAC-PUB-7983
- Country of Publication:
- United States
- Language:
- English
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