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arXiv 2402.06141hep-ph
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重-轻赝标介子与矢量介子的电磁形状因子

The electromagnetic form factors of heavy-light pseudo-scalar and vector mesons

Yin-Zhen Xu

AI总结:

首次在Dyson-Schwinger/Bethe-Salpeter方程框架内系统研究重-轻赝标与矢量介子电磁形状因子,发现矢量介子电荷半径更大,且味对称性破缺导致的夸克分布变化共同决定了介子电磁形状因子。

摘要:

我们首次在Dyson-Schwinger/Bethe-Salpeter方程框架内,系统研究了重-轻赝标介子与矢量介子的电磁形状因子。研究发现,矢量介子的电荷半径大于其对应的赝标介子。在重-轻系统中,味对称性破缺会导致不同夸克形状因子的劈裂,较轻与较重夸克的分布范围分别逐渐扩大和收缩。它们之间的竞争共同产生了介子的电磁形状因子。我们的结果可与其他理论计算及未来的实验数据进行比较。

英文摘要:

We systematically investigate the electromagnetic form factors of heavy-light pseudo-scalar and vector mesons within the Dyson-Schwinger/Bethe-Salpeter equations framework for the first time. It is found that the charge radius of vector meson is larger than that of its pseudo-scalar counterpart. In heavy-light systems, the flavor symmetry breaking will lead to a splitting of the form factor of different quark, and the distribution range of lighter and heavier quark gradually expands and contracts, respectively. The competition between them together generates the electromagnetic form factors of meson. Our results can be compared with other theoretical calculations and future experimental data.

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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