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arXiv 1709.01640hep-ph
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瞬子诱导的组分夸克和核子中的胶子分布

Gluonic Distribution in the Constituent Quark and Nucleon Induced by the Instantons

Baiyang Zhang, Nikolai Kochelev, Hee-Jung Lee, Pengming Zhang

摘要:

瞬子效应对强相互作用过程有很大的贡献,特别是在微扰QCD不再成立的能量尺度上。然而,在组分夸克和核子中,瞬子对胶子的贡献还没有被计算过。基于组分夸克图像和QCD真空的瞬子模型,我们首次计算了组分夸克和核子中的非极化和极化胶子分布。我们发现π介子场在产生非极化和极化胶子分布中起着重要的作用。

英文摘要:

Instanton effects can give large contribution to strong interacting processes, especially at the energy scale where perturbative QCD is no longer valid. However instanton contribution to the gluon contribution in constituent quark and nucleon has never been calculated before. Based on both the constituent quark picture and the instanton model for QCD vacuum, we calculate the unpolarized and polarized gluon distributions in the constituent quark and in the nucleon for the first time. We find that the pion field plays an important role in producing both the unpolarized and the polarized gluon distributions.

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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