论文标题
Parton模型中TMD之间的夸克模型关系
Quark-model relations among TMDs in the parton model
论文作者
论文摘要
协变量Parton模型（CPM）是Parton模型概念在核子结构中的应用。在此模型中，可以选择将夸克放置在纯旋转状态或混合旋转状态。我们表明，CPM的混合旋转版本不支持横向动量依赖的Parton分布（TMDS）之间的夸克模型关系，这些分布（TMDS）被证明在大量的夸克模型中。可以通过施加等同于将夸克置于纯旋转状态的条件来强制强制在CPM中有效的夸克模型关系。这给出了关于纯旋转状态CPM版本的连接的互补观点，并提供了一个问题，可以在QCD中以某种有用的数值准确性在QCD中实现Quark-Model关系作为“近似关系”。
The covariant parton model (CPM) is a consequent application of the parton model concept to the nucleon structure. In this model, there is a choice to put quarks either in a pure-spin state or in a mixed-spin state. We show that the mixed-spin version of the CPM does not support the quark-model relations among transverse momentum dependent parton distributions (TMDs) which were shown to hold in a large class of quark models. One can enforce the quark-model relations to be valid in the CPM by imposing a condition which is equivalent to putting the quarks in a pure-spin state. This gives a complementary perspective on the connection of the pure- and mixed-spin state CPM versions, and provides a fresh view on the question whether the quark-model relations could be realized in QCD as "approximate relations" with some useful numerical accuracy.
