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arXiv 1901.06008nucl-th
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核介质中的π介子结构

Pion structure in a nuclear medium

Parada. T. P. Hutauruk, Yongseok Oh, K. Tsushima

摘要:

本文在Nambu-Jona-Lasinio模型的框架下讨论了对称核物质中π介子的结构和电弱性质。π介子被描述为一个由贝特-萨尔彼得方程控制的缀饰夸克-反夸克对的束缚态。对于介质中的流-光-夸克性质,我们采用夸克-介子耦合模型,该模型成功地描述了核介质中强子的性质。我们发现,随着核物质密度的增加,轻夸克凝聚、π衰变常数和π-夸克耦合常数减小。然后,我们预测了带电π介子在核物质中的电荷半径的变化。

英文摘要:

The structure and electroweak properties of the pion in symmetric nuclear matter are presented in the framework of the Nambu--Jona-Lasinio model. The pion is described as a bound state of a dressed quark-antiquark pair governed by the Bethe-Salpeter equation. For the in-medium current-light-quark properties we use the quark-meson coupling model, which describes successfully the properties of hadron in a nuclear medium. We found that the light-quark condensates, the pion decay constant and pion-quark coupling constant decrease with increasing nuclear matter density. We then predict the modifications of the charge radius of the charged pion in nuclear matter.

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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