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arXiv 1707.08463hep-ph
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类空动量区重子电磁跃迁形状因子

Electromagnetic transition form factors of baryons in the space-like momentum region

Helios Sanchis-Alepuz, Reinhard Alkofer, Christian S. Fischer

摘要:

本文计算了基态八重态重子和十重态重子之间的电磁跃迁形状因子以及从八重态的$Σ^0$到$Λ$的跃迁。我们在Dyson-Schwinger方程和协变的Bethe-Salpeter方程的框架下研究了夸克-胶子相互作用,所有的元素,重子三体波函数,夸克传播子和缀饰夸克-光子顶点都是由夸克-胶子相互作用的动量依赖近似确定的.我们特别讨论了不同跃迁之间的相似性以及SU(3)-同位旋对称性破缺引起的差异。此外,我们提供了估计的斜率的电和磁$Σ^0$到$Λ$过渡在零光子动量点。

英文摘要:

We present results from a calculation of the electromagnetic transition form factors between ground-state octet and decuplet baryons as well as the octet-only $Σ^0$ to $Λ$ transition. We work in the combined framework of Dyson-Schwinger equations and covariant Bethe-Salpeter equations with all elements, the baryon three body wave function, the quark propagators and the dressed quark-photon vertex determined from a well-established, momentum dependent approximation for the quark-gluon interaction. We discuss in particular the similarities among the different transitions as well as the differences induced by SU(3)-isospin symmetry breaking. We furthermore provide estimates for the slopes of the electric and magnetic $Σ^0$ to $Λ$ transitions at the zero photon momentum point.

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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