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arXiv 1404.2702hep-phhep-ex
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部分子分布模型与核子形状因子的描述

Models of parton distributions and the description of form factors of nucleon

O. V. Selyugin

摘要:

在最小自由参数广义部分子分布(GPD)的t依赖模型及其一些扩展形式的框架下,对质子和中子电磁形状因子实验数据进行了描述,并对不同部分子分布函数(PDF)进行了比较分析.在某些情况下,发现不同的概率密度函数对核子电磁形状因子的描述有很大的差异。提出并讨论了上夸克和下夸克形状因子的味依赖性的不同变体。还计算了用不同的概率密度函数得到的引力形状因子,并将异常重磁矩与等效原理进行了比较。给出了真实康普顿散射的微分截面的计算。

英文摘要:

The comparative analysis of different sets of the parton distribution functions (PDFs), based on the description of the whole sets of experimental data of electromagnetic form factors of the proton and neutron, is made in the framework of the model of t-dependence of the generalized parton distributions (GPDs) with minimum free parameters and some extending variants of the model. In some cases, a large difference in the description of electromagnetic form factors of nucleons with using the different sets of PDF are found out. The different variants of the flavor dependence of the up and down quark form factors are presented and discussed. The gravitation form factors, obtained with the different sets of PDF, are also calculated and the anomalous gravimagnetic moment is compared with the Equivalence Principle. The calculations of the differential cross sections of the real Compton scattering are presented.

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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