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arXiv 0811.1752hep-ph
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重子基态和共振态的相对论夸克模型结果

Relativistic Quark-Model Results for Baryon Ground and Resonant States

W. Plessas, T. Melde

摘要:

报道了在相对论组分夸克模型中研究重子基态和共振态的最新结果。在回顾了一些典型的光谱性质之后,讨论了基态的描述,特别是核子和超子的电磁结构。在下文中,总结了最近的协变预测的π介子,η介子和K介子部分衰变宽度的光和奇怪的重子共振低于2 GeV。这些结果表现出一种特征模式,这是不同于迄今为止进行的非相对论性或相对化衰变研究。结合对波函数的自旋、味和空间结构的详细分析,它支持了一个新的和扩展的分类方案,将重子基态和共振态分类为SU(3)味多重态。

英文摘要:

Latest results from a study of baryon ground and resonant states within relativistic constituent quark models are reported. After recalling some typical spectral properties, the description of ground states, especially with regard to the nucleon and hyperon electromagnetic structures, is addressed. In the following, recent covariant predictions for pion, eta, and kaon partial decay widths of light and strange baryon resonances below 2 GeV are summarized. These results exhibit a characteristic pattern that is distinct from nonrelativistic or relativized decay studies performed so far. Together with a detailed analysis of the spin, flavor, and spatial structures of the wave functions, it supports a new and extended classification scheme of baryon ground and resonant states into SU(3) flavor multiplets.

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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