$J/ψΛ$ femtoscopy and the nature of $P_{ψs}^Λ(4338)$
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866911346933628928 |
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| author | Shen, Yi-Bo Liu, Zhi-Wei Liu, Ming-Zhu Shi, Rui-Xiang Xiao, Chu-Wen Liang, Wei-Hong Geng, Li-Sheng |
| author_facet | Shen, Yi-Bo Liu, Zhi-Wei Liu, Ming-Zhu Shi, Rui-Xiang Xiao, Chu-Wen Liang, Wei-Hong Geng, Li-Sheng |
| contents | Over the past two decades, numerous exotic hadron states have been discovered, yet their underlying nature remains unclear. It is widely acknowledged that understanding hadron-hadron interactions is essential to unraveling their properties. Hadron spectroscopy is a powerful tool for this endeavor, providing rich experimental data that can shed light on exotic systems. Recently, the LHCb experiment analyzed the process $B^{-} \rightarrow J/ψΛ\bar{p}$ and observed a narrow peak in the $J/ψΛ$ invariant mass spectrum, regarding it as a candidate for a pentaquark. In this work, we extract the coupled-channel $J / ψΛ-\bar{D} Ξ_c-\bar{D}_s Λ_c$ potential based on the $J/ψΛ$ invariant mass spectrum. Our results indicate the existence of a bound state below the $\bar{D} Ξ_c$ mass threshold, corresponding to the experimentally measured state $P_{cs}(4338)$. Furthermore, we predict the scattering lengths and momentum correlation functions for the $J/ψΛ$ and $\bar{D}Ξ_c$ channels, which serve as theoretical references for future femtoscopy experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_24247 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | $J/ψΛ$ femtoscopy and the nature of $P_{ψs}^Λ(4338)$ Shen, Yi-Bo Liu, Zhi-Wei Liu, Ming-Zhu Shi, Rui-Xiang Xiao, Chu-Wen Liang, Wei-Hong Geng, Li-Sheng High Energy Physics - Phenomenology High Energy Physics - Experiment Over the past two decades, numerous exotic hadron states have been discovered, yet their underlying nature remains unclear. It is widely acknowledged that understanding hadron-hadron interactions is essential to unraveling their properties. Hadron spectroscopy is a powerful tool for this endeavor, providing rich experimental data that can shed light on exotic systems. Recently, the LHCb experiment analyzed the process $B^{-} \rightarrow J/ψΛ\bar{p}$ and observed a narrow peak in the $J/ψΛ$ invariant mass spectrum, regarding it as a candidate for a pentaquark. In this work, we extract the coupled-channel $J / ψΛ-\bar{D} Ξ_c-\bar{D}_s Λ_c$ potential based on the $J/ψΛ$ invariant mass spectrum. Our results indicate the existence of a bound state below the $\bar{D} Ξ_c$ mass threshold, corresponding to the experimentally measured state $P_{cs}(4338)$. Furthermore, we predict the scattering lengths and momentum correlation functions for the $J/ψΛ$ and $\bar{D}Ξ_c$ channels, which serve as theoretical references for future femtoscopy experiments. |
| title | $J/ψΛ$ femtoscopy and the nature of $P_{ψs}^Λ(4338)$ |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2512.24247 |