Searching for the two poles of the $Ξ(1820)$ in the $ψ(3686) \to \barΞ^+ \bar{K}^0 Σ^{*-}(π^- Λ)$ decay
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866917658490830848 |
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| author | Duan, Man-Yu Song, Jing Liang, Wei-Hong Oset, E. |
| author_facet | Duan, Man-Yu Song, Jing Liang, Wei-Hong Oset, E. |
| contents | We propose the reaction $ψ(3686) \to \barΞ^+ \bar{K}^0 Σ^{*-}$, with the $Σ^{*-}$ decaying to $π^- Λ$ in order to show evidence for the existence of two $Ξ(1820)$ states, one around $1824$ MeV and narrow, and another one around $1875$ MeV and wide. The phase space for $\bar{K}^0 Σ^{*-}$ production reduces the effect of the lower mass resonance, magnifying the effect of the higher mass resonance that shows clearly over the phase space. The estimated rate of the production is bigger than the one of the $ψ(3686) \to \barΞ^+ K^- Λ$ reaction, where a clear peak for $Ξ(1820)$ was observed by the BESIII collaboration, what makes the Beijing facility ideal to carry out the reaction proposed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_03622 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Searching for the two poles of the $Ξ(1820)$ in the $ψ(3686) \to \barΞ^+ \bar{K}^0 Σ^{*-}(π^- Λ)$ decay Duan, Man-Yu Song, Jing Liang, Wei-Hong Oset, E. High Energy Physics - Phenomenology High Energy Physics - Theory We propose the reaction $ψ(3686) \to \barΞ^+ \bar{K}^0 Σ^{*-}$, with the $Σ^{*-}$ decaying to $π^- Λ$ in order to show evidence for the existence of two $Ξ(1820)$ states, one around $1824$ MeV and narrow, and another one around $1875$ MeV and wide. The phase space for $\bar{K}^0 Σ^{*-}$ production reduces the effect of the lower mass resonance, magnifying the effect of the higher mass resonance that shows clearly over the phase space. The estimated rate of the production is bigger than the one of the $ψ(3686) \to \barΞ^+ K^- Λ$ reaction, where a clear peak for $Ξ(1820)$ was observed by the BESIII collaboration, what makes the Beijing facility ideal to carry out the reaction proposed. |
| title | Searching for the two poles of the $Ξ(1820)$ in the $ψ(3686) \to \barΞ^+ \bar{K}^0 Σ^{*-}(π^- Λ)$ decay |
| topic | High Energy Physics - Phenomenology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2405.03622 |