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arXiv 2407.13486hep-phhep-exnucl-th
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利用SU(3)味过滤器识别$Λ(1405)$的双极点结构

Identifying the two-pole structure of the $Λ(1405)$ using an SU(3) flavor filter

Ying-Bo He, Xiao-Hai Liu, Li-Sheng Geng, Feng-Kun Guo, Ju-Jun Xie

AI总结:

提出利用SU(3)味过滤器,通过粲偶素衰变道分离$Λ(1405)$的双极点结构,以解决其长期谜题。

摘要:

我们提出了一种新颖的方法来识别$Λ(1405)$的双极点结构。这两个极点源于介子-重子耦合道相互作用中不同的夸克味不可约表示,因此它们应在提供良好味本征态源的反应中分别显现。粲偶素强子衰变为$\arΛΣπ$和$\arΛ(1520)Σπ$正是这类反应,在这两个衰变模式中可以近似分离出味八重态和单重态极点。这种SU(3)味过滤器即使在考虑味对称性破缺的情况下也有效。鉴于已收集的大量粲偶素数据,利用所提出的味过滤器有望解决长期存在的$Λ(1405)$之谜。

英文摘要:

We propose a novel method to identify the two-pole structure of the $Λ(1405)$. The two poles owe their origin to different quark flavor irreducible representations in the meson-baryon coupled-channel interactions, thus they should be individually manifested in reactions that provide good flavor eigenstate sources. Hadronic decays of charmonia into $\barΛΣπ$ and $\barΛ(1520)Σπ$ are such reactions, and the flavor octet and singlet poles can be approximately singled out in these two decay modes. This SU(3) flavor filter works even considering the flavor symmetry breaking. With the huge charmonium data sets collected, it is therefore promising to solve the long-standing $Λ(1405)$ puzzle employing the proposed flavor filter.

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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