伪标量和矢量介子电磁形状因子的评估

IF 1.7 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY Few-Body Systems Pub Date : 2023-07-11 DOI:10.1007/s00601-023-01845-6

Yin-Zhen Xu, Jorge Segovia

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引用次数: 0

摘要

在量子色动力学的Dyson-Schwinger/Bethe-Salpeter方程的框架下，我们研究了从轻夸克到重夸克扇区中具有不同隐藏味道的伪标量和矢量介子的电磁形状因子，并将结果与单极矢量介子优势(VMD)模型的结果进行了比较。结果表明，矢量介子的电荷半径大于其赝标量对应的介子的电荷半径。随着电流夸克质量的增加，矢量介子的电形态因子趋于接近赝标量介子的电形态因子，并逐渐偏离VMD模型的预测。

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An Assessment of Pseudoscalar and Vector Meson Electromagnetic Form Factors

Within the framework of the Dyson-Schwinger/Bethe-Salpeter equations of quantum chromodynamics, we investigate the electromagnetic form factors of pseudoscalar and vector mesons with different hidden-flavor, from light to heavy quark sectors, and compare the results with those of the single-pole vector meson dominance (VMD) model. It is found that the charge radius of vector meson is larger than that of its pseudoscalar counterpart. As the current-quark mass increases, the electric form factor of the vector meson tends to approach that of its pseudoscalar counterpart, and gradually deviates from the prediction of the VMD model.

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来源期刊

Few-Body Systems 物理-物理：综合

CiteScore

2.90

自引率

18.80%

发文量

审稿时长

6-12 weeks

期刊介绍： The journal Few-Body Systems presents original research work – experimental, theoretical and computational – investigating the behavior of any classical or quantum system consisting of a small number of well-defined constituent structures. The focus is on the research methods, properties, and results characteristic of few-body systems. Examples of few-body systems range from few-quark states, light nuclear and hadronic systems; few-electron atomic systems and small molecules; and specific systems in condensed matter and surface physics (such as quantum dots and highly correlated trapped systems), up to and including large-scale celestial structures. Systems for which an equivalent one-body description is available or can be designed, and large systems for which specific many-body methods are needed are outside the scope of the journal. The journal is devoted to the publication of all aspects of few-body systems research and applications. While concentrating on few-body systems well-suited to rigorous solutions, the journal also encourages interdisciplinary contributions that foster common approaches and insights, introduce and benchmark the use of novel tools (e.g. machine learning) and develop relevant applications (e.g. few-body aspects in quantum technologies).