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arXiv 1206.1876hep-ph
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广义部分子分布模型中核子形状因子的味依赖性解释

Interpretation of the Flavor Dependence of Nucleon Form Factors in a Generalized Parton Distribution Model

J. Osvaldo Gonzalez-Hernandez, Simonetta Liuti, Gary R. Goldstein, Kunal Kathuria

摘要:

我们给出了一个解释的$u$和$d$夸克贡献的核子电磁形状因子的值的四个动量转移在多GeV区域的味道分离的数据最近已经取得。数据显示,特别是,抑制$d$夸克相对于$u$夸克在大动量转移。%和恒定比率的风味依赖的泡利与狄拉克形状因子比率。这种趋势可以解释使用reggeized双夸克模型计算广义部分子分布,从而提供了动量和坐标空间之间的相关性,这两者都是必要的,以解释部分子结构的形状因子。我们扩展我们的讨论广义部分子分布的第二时刻,被认为有助于部分子角动量。

英文摘要:

We give an interpretation of the $u$ and $d$ quarks contributions to the nucleon electromagnetic form factors for values of the four-momentum transfer in the multi-GeV region where flavor separated data have been recently made available. The data show, in particular, a suppression of $d$ quarks with respect to $u$ quarks at large momentum transfer. %and constant ratios of the flavor dependent Pauli to Dirac form factors ratios. This trend can be explained using a reggeized diquark model calculation of generalized parton distributions, thus providing a correlation between momentum and coordinate spaces, both of which are necessary in order to interpret the partonic substructure of the form factors. We extend our discussion to the second moments of generalized parton distributions which are believed to contribute to partonic angular momentum.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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