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arXiv 2109.03591hep-phhep-exhep-latnucl-th
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核物质中的胶子EMC效应

Gluon EMC effects in nuclear matter

Xuan-Gong Wang, Wolfgang Bentz, Ian C. Cloët, Anthony W. Thomas

摘要:

本文在修正束缚核子结构的基础上,利用Nambu-Jona-Lasinio模型,在原子核结构的平均场模型中研究了原子核的胶子结构.这种方法已被证明可以重现欧洲μ子合作(EMC)效应,涉及较重原子核的自旋无关结构函数与氘的自旋无关结构函数的比值。它还预测了一个显着的核修改的自旋结构功能,被称为极化EMC效应。在这里,我们报告了相当大的核修改的胶子分布(“胶子EMC效应”)的比率的非极化和极化胶子分布在核物质的自由核子。

英文摘要:

We investigate the gluonic structure of nuclei within a mean-field model of nuclear structure based upon the modification of the structure of a bound nucleon, with the nucleon described by the Nambu--Jona-Lasinio model. This approach has been shown to reproduce the European Muon Collaboration (EMC) effect, involving the ratio of the spin-independent structure functions of a heavier nucleus to that of the deuteron. It also predicts a significant nuclear modification for the spin structure functions, known as the polarized EMC effect. Here we report sizeable nuclear modifications of the gluon distributions (a "gluon EMC effect") for the ratios of both the unpolarized and polarized gluon distributions in nuclear matter to those of a free nucleon.

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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