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| Format: | Preprint |
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2025
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| Online Access: | https://arxiv.org/abs/2507.06991 |
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| _version_ | 1866914238816059392 |
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| author | Alasiri, Fareed Braaten, Eric Bruschini, Roberto |
| author_facet | Alasiri, Fareed Braaten, Eric Bruschini, Roberto |
| contents | We provide a simple explanation for the observed hidden-charm pentaquarks as bound states in Born-Oppenheimer potentials. We identify $P_{c\bar{c}}(4312)^+$, $P_{c\bar{c}}(4440)^+$, and $P_{c\bar{c}}(4457)^+$ as heavy-quark spin states in a quartet of $c \bar{c}$ pentaquarks with $J^P$ quantum numbers $\frac{1}{2}^-$, $\frac{3}{2}^-$, and $\frac{5}{2}^-$. The quantum numbers of $P_{c\bar{c}}(4457)^+$ differ from most previous predictions. We also predict a fourth $c\bar{c}$ pentaquark with quantum numbers $\frac{3}{2}^-$ near the $Σ_c^\ast\bar{D}$ threshold. We identify $P_{c\bar{c}s}(4338)^0$ and $P_{c\bar{c}s}(4459)^0$ as heavy-quark spin states in a triplet of $c \bar{c}s$ pentaquarks with quantum numbers $\frac{1}{2}^-$ and either $\frac{1}{2}^-$ or $\frac{3}{2}^-$. We also predict a third $c\bar{c}s$ pentaquark with quantum numbers either $\frac{3}{2}^-$ or $\frac{1}{2}^-$ near the $Ξ_c\bar{D}^\ast$ threshold. We explain why the observed hidden-charm pentaquarks have narrow widths. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_06991 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Hidden-Heavy Pentaquarks and Where to Find Them Alasiri, Fareed Braaten, Eric Bruschini, Roberto High Energy Physics - Phenomenology We provide a simple explanation for the observed hidden-charm pentaquarks as bound states in Born-Oppenheimer potentials. We identify $P_{c\bar{c}}(4312)^+$, $P_{c\bar{c}}(4440)^+$, and $P_{c\bar{c}}(4457)^+$ as heavy-quark spin states in a quartet of $c \bar{c}$ pentaquarks with $J^P$ quantum numbers $\frac{1}{2}^-$, $\frac{3}{2}^-$, and $\frac{5}{2}^-$. The quantum numbers of $P_{c\bar{c}}(4457)^+$ differ from most previous predictions. We also predict a fourth $c\bar{c}$ pentaquark with quantum numbers $\frac{3}{2}^-$ near the $Σ_c^\ast\bar{D}$ threshold. We identify $P_{c\bar{c}s}(4338)^0$ and $P_{c\bar{c}s}(4459)^0$ as heavy-quark spin states in a triplet of $c \bar{c}s$ pentaquarks with quantum numbers $\frac{1}{2}^-$ and either $\frac{1}{2}^-$ or $\frac{3}{2}^-$. We also predict a third $c\bar{c}s$ pentaquark with quantum numbers either $\frac{3}{2}^-$ or $\frac{1}{2}^-$ near the $Ξ_c\bar{D}^\ast$ threshold. We explain why the observed hidden-charm pentaquarks have narrow widths. |
| title | Hidden-Heavy Pentaquarks and Where to Find Them |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2507.06991 |