科研之友
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摘要
The spin structure of a system of quasifree fermions having a total angular momentum J=1/2 is studied in a consistently covariant approach. Within this model the relations between the spin functions are obtained. Their particular cases are the sum rules of Wanzura and Wilczek, Efremov, Leader, and Teryaev, and Burkhardt and Cottingham and also the expression for the Wanzura-Wilczek twist 2 term g(2)(WW). With the use of the proton valence quark distributions as input, the corresponding spin functions are obtained. The resulting structure functions g(1) and g(2) are quite compatible with the experimental data.
- 出版日期2003-1-1
