Identifying the two-pole structure of the $Λ(1405)$ using an SU(3) flavor filter
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866913435295416320 |
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| author | He, Ying-Bo Liu, Xiao-Hai Geng, Li-Sheng Guo, Feng-Kun Xie, Ju-Jun |
| author_facet | He, Ying-Bo Liu, Xiao-Hai Geng, Li-Sheng Guo, Feng-Kun Xie, Ju-Jun |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_13486 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Identifying the two-pole structure of the $Λ(1405)$ using an SU(3) flavor filter He, Ying-Bo Liu, Xiao-Hai Geng, Li-Sheng Guo, Feng-Kun Xie, Ju-Jun High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Theory 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. |
| title | Identifying the two-pole structure of the $Λ(1405)$ using an SU(3) flavor filter |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2407.13486 |