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arXiv 1107.4952hep-phhep-latnucl-th
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核子的横奇异夸克自旋结构

Transverse strange quark spin structure of the nucleon

Tim Ledwig, Hyun-Chul Kim

摘要:

本文在SU(3)手征夸克孤子模型的框架下研究了最低磁矩核子的横夸克自旋密度,着重研究了奇异夸克自旋密度。基于矢量和张量形状因子的已有结果,我们能够确定非极化核子中横极化夸克和横极化核子中横极化夸克的依赖于碰撞参数的几率密度.我们发现,目前的数值计算结果的上,下夸克的横自旋密度与格点计算的结果符合得很好。我们预言了奇异夸克的横自旋密度。原来极化的奇异夸克在非极化的质子中是明显扭曲的。

英文摘要:

We investigate the transverse quark spin densities of the nucleon with the lowest moment within the framework of the SU(3) chiral quark-soliton model, emphasizing the strange quark spin density. Based on previous results of the vector and tensor form factors, we are able to determine the impact-parameter dependent probability densities of transversely polarized quarks in an unpolarized nucleon as well as those of unpolarized quarks in a transversely polarized nucleon. We find that the present numerical results for the transverse spin densities of the up and down quarks are in good agreement with those of the lattice calculation. We predict the transvere spin densities of the strange quark. It turns out that the polarized strange quark is noticeably distorted in an unpolarized proton.

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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