Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-02-17
Phys.Rev. D50 (1994) 3119-3123
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, 4 postscript figures can be obtained from author
Scientific paper
10.1103/PhysRevD.50.3119
In this paper, we show what we can learn from the CEBAF experiments on spin-structure functions, and the transition from the Drell-Hearn-Gerasimov sum rule in the real photon limit to the spin dependent sum rules in the deep inelastic scattering, and how the asymmetry $A_1(x,Q^2)$ approaches the scaling limit in the resonance region. The spin structure function in the resonance region alone can not determine the spin-dependent sum rule due to the kinematic restriction of the resonance region. The integral $\int_0^1 \frac {A_1(x,Q^2)F_2(x,Q^2)}{2x(1+R(x,Q^2))}dx$ is estimated from $Q^2=0$ to $2.5$ GeV$^2$. The result shows that there is a region where both contributions from the baryon resonances and the deep inelastic scattering are important, thus provides important information on the high twist effects on the spin dependent sum rule.
Li Zhenping
Li Zhujun
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