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arXiv 0901.1786hep-ph
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广义部分子分布与核子电磁和引力子形状因子的描述

Generalized Parton Distributions and Description of Electromagnetic and Graviton form factors of nucleon

O. V. Selyugin, O. V. Teryaev

摘要:

提出了广义部分子分布t依赖的新参数化。它允许人们充分好地再现质子和中子在小动量转移和大动量转移时的电磁形状因子。比较了Rosenbluth法和偏振法对数据的描述。后一种方法得到的结果与相应的中子数据是一致的。研究了中子电荷密度与碰撞参量的关系。得到了夸克对核子引力形状因子的贡献。

英文摘要:

The new parameterization of the generalized parton distributions t-dependence is proposed. It allows one to reproduce sufficiently well the electromagnetic form factors of the proton and neutron at small and large momentum transfer. The description of the data obtained by the Rosenbluth method and the polarization method are compared. The results obtained by the latter method are shown to be compatible with the correspondent neutron data. The impact parameter dependence of the neutron charge density is examined. The quark contributions to gravitational form factors of the nucleons are obtained.

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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