Molecular $P_ψ$ pentaquarks from light-meson exchange saturation
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2022
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| _version_ | 1866929677454540800 |
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| author | Yang, Zi-Ying Peng, Fang-Zheng Yan, Mao-Jun Sánchez, Mario Sánchez Valderrama, Manuel Pavon |
| author_facet | Yang, Zi-Ying Peng, Fang-Zheng Yan, Mao-Jun Sánchez, Mario Sánchez Valderrama, Manuel Pavon |
| contents | Theoretical predictions for the spectrum of heavy meson-baryon bound states are a fundamental tool for disentangling the nature of the different pentaquark states that have been observed in experimental facilities. Here we explore this spectrum in a phenomenological model that describes the heavy meson-baryon interaction in terms of a contact-range interaction, where the coupling strength is saturated by the exchange of light scalar and vector mesons, i.e. $σ$, $ρ$ and $ω$ exchanges. Saturation determines the couplings modulo an unknown proportionality constant that can be calibrated from a molecular candidate. If we use the $P_ψ^N(4312)$ as input, we predict a series of molecular pentaquarks including the $P_ψ^N(4440)$ and $P_ψ^N(4457)$, the recent $P_{ψs}^Λ(4338)$ and the $P_{ψs}^Λ(4459)$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2211_08211 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Molecular $P_ψ$ pentaquarks from light-meson exchange saturation Yang, Zi-Ying Peng, Fang-Zheng Yan, Mao-Jun Sánchez, Mario Sánchez Valderrama, Manuel Pavon High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice Nuclear Theory Theoretical predictions for the spectrum of heavy meson-baryon bound states are a fundamental tool for disentangling the nature of the different pentaquark states that have been observed in experimental facilities. Here we explore this spectrum in a phenomenological model that describes the heavy meson-baryon interaction in terms of a contact-range interaction, where the coupling strength is saturated by the exchange of light scalar and vector mesons, i.e. $σ$, $ρ$ and $ω$ exchanges. Saturation determines the couplings modulo an unknown proportionality constant that can be calibrated from a molecular candidate. If we use the $P_ψ^N(4312)$ as input, we predict a series of molecular pentaquarks including the $P_ψ^N(4440)$ and $P_ψ^N(4457)$, the recent $P_{ψs}^Λ(4338)$ and the $P_{ψs}^Λ(4459)$. |
| title | Molecular $P_ψ$ pentaquarks from light-meson exchange saturation |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice Nuclear Theory |
| url | https://arxiv.org/abs/2211.08211 |