Quark model analysis of the Sivers function
Quark model analysis of the Sivers function
复制标题
Sivers函数的夸克模型分析
DOI：
10.1103/physrevd.78.034002
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发表时间：
2008
影响因子：
5
通讯作者：
V. Vento
中科院分区：
文献类型：
--
作者：
A. Courtoy;F. Fratini;S. Scopetta;V. Vento
我们开发了一个形式主义来评估Sivers功能。该方法非常适合于使用组分夸克模型来描述核子结构的计算。一个非相对论性的约化的计划进行和应用于Isgur-Karl模型的强子结构。所获得的结果与相当大的Sivers效应一致，并且u和d风味贡献的符号相反。这种模式是在协议中发现的分析，在同一模型中，影响参数依赖的广义部分子分布。Burkardt求和规则在很大程度上得到了满足。我们估计了我们的结果从模型动量尺度到实验动量尺度的QCD演化，并得到了与现有数据的合理一致。
We develop a formalism to evaluate the Sivers function. The approach is well suited for calculations which use constituent quark models to describe the structure of the nucleon. A nonrelativistic reduction of the scheme is performed and applied to the Isgur-Karl model of hadron structure. The results obtained are consistent with a sizable Sivers effect and the signs for the u and d flavor contributions turn out to be opposite. This pattern is in agreement with the one found analyzing, in the same model, the impact parameter dependent generalized parton distributions. The Burkardt sum rule turns out to be fulfilled to a large extent. We estimate the QCD evolution of our results from the momentum scale of the model to the experimental one and obtain reasonable agreement with the available data.