Prediction of $QQqq\bar{s}$ molecular pentaquarks within the extended local hidden gauge approach
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arXiv
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866908523956273152 |
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| author | Wang, Zhong-Yu Long, Zheng-Wen |
| author_facet | Wang, Zhong-Yu Long, Zheng-Wen |
| contents | We investigate hadronic molecular states with the quark contents $ccqq\bar{s}$, $bbqq\bar{s}$, and $bcqq\bar{s}$ $(q=u,d)$ by employing the extended local hidden gauge approach. Considering that the $S$-wave meson-baryon interactions are dominated by vector meson exchange, the coupled channels scattering amplitudes are obtained by solving the Bethe-Salpeter equation in its on-shell form. We find that the poles appearing on the complex Riemann sheet are potential candidates for dynamically generated molecular pentaquark states. The results suggest the existence of a total of fourteen molecular states with quantum numbers $I(J^{P})=0(1/2^{-})$, $0(3/2^{-})$, and $0(5/2^{-})$, which arise from the interactions of the $K^{(*)}Ξ_{cc}^{(*)}$, $K^{(*)}Ξ_{bb}^{(*)}$, $K^{(*)}Ξ_{bc}^{(*)}$, and $K^{(*)}Ξ_{bc}^{'}$ channels, respectively. Their binding energies are calculated to be about $0.1-33$ MeV, and this range depends on the free parameter of the theory. Our research contributes to the spectroscopic studies of hadronic molecular pentaquark states. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_21474 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Prediction of $QQqq\bar{s}$ molecular pentaquarks within the extended local hidden gauge approach Wang, Zhong-Yu Long, Zheng-Wen High Energy Physics - Phenomenology We investigate hadronic molecular states with the quark contents $ccqq\bar{s}$, $bbqq\bar{s}$, and $bcqq\bar{s}$ $(q=u,d)$ by employing the extended local hidden gauge approach. Considering that the $S$-wave meson-baryon interactions are dominated by vector meson exchange, the coupled channels scattering amplitudes are obtained by solving the Bethe-Salpeter equation in its on-shell form. We find that the poles appearing on the complex Riemann sheet are potential candidates for dynamically generated molecular pentaquark states. The results suggest the existence of a total of fourteen molecular states with quantum numbers $I(J^{P})=0(1/2^{-})$, $0(3/2^{-})$, and $0(5/2^{-})$, which arise from the interactions of the $K^{(*)}Ξ_{cc}^{(*)}$, $K^{(*)}Ξ_{bb}^{(*)}$, $K^{(*)}Ξ_{bc}^{(*)}$, and $K^{(*)}Ξ_{bc}^{'}$ channels, respectively. Their binding energies are calculated to be about $0.1-33$ MeV, and this range depends on the free parameter of the theory. Our research contributes to the spectroscopic studies of hadronic molecular pentaquark states. |
| title | Prediction of $QQqq\bar{s}$ molecular pentaquarks within the extended local hidden gauge approach |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2508.21474 |