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arXiv 2012.10105hep-ph
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手征夸克模型中强子-强子耦合阈值的研究

Coupling hadron-hadron thresholds within a chiral quark model approach

Pablo G. Ortega, David R. Entem

摘要:

直到上个世纪末,在朴素的夸克模型中,重强子光谱学才得到很好的理解。然而,在2003年,人们发现了$X(3872)$,它具有在简单的朴素夸克模型中难以理解的令人困惑的性质。这个状态清楚地表明,重介子的激发态应该与双介子态耦合,以便不仅理解质量,而且在某些情况下,理解意想不到的衰变性质。在这篇工作中,我们将回顾如何天真夸克模型可以补充耦合到两个强子阈值。这个程序已经被应用到重介子谱的手征夸克模型,我们展示了一些例子中的阈值是特别相关的。

英文摘要:

Heavy hadron spectroscopy was well understood within the naive quark model until the end of the past century. However, in 2003, the $X(3872)$ was discovered, with puzzling properties difficult to understand in the simple naive quark model picture. This state made clear that excited states of heavy mesons should be coupled to two-meson states in order to understand not only the masses but, in some cases, unexpected decay properties. In this work we will review how the naive quark model can be complemented with the coupling to two hadron thresholds. This program has been already applied to the heavy meson spectrum with the chiral quark model and we show some examples where thresholds are of special relevance.

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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