Molecular charmed baryons and pentaquarks from light-meson exchange saturation
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arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| _version_ | 1866910657465548800 |
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| author | Yan, Mao-Jun Peng, Fang-Zheng Valderrama, Manuel Pavon |
| author_facet | Yan, Mao-Jun Peng, Fang-Zheng Valderrama, Manuel Pavon |
| contents | The spectrum of the $c qq$ baryons contains a few states whose nature is not clearly a three-quark composite and which might have a sizable baryon-meson component. Examples include the $Σ_c(2800)$ or the $Λ_c(2940)$. Here we explore the spectrum of two-body systems composed of a light, octet baryon and a charmed meson (or antimeson) within a simple contact-range theory in which the couplings are saturated by light-meson exchanges. This results in the prediction of a series of composite anticharmed pentaquarks ($\bar{c} q qqq $) and singly-charmed baryons ($c \bar{q} qqq $). Among the later we find $J=\tfrac{1}{2}$ $ΞD$ and $J=\tfrac{3}{2}$ $ΞD^*$ bound states with masses matching those of the recently observed $Ω_c(3185)$ and $Ω_c(3327)$ baryons. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2304_14855 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Molecular charmed baryons and pentaquarks from light-meson exchange saturation Yan, Mao-Jun Peng, Fang-Zheng Valderrama, Manuel Pavon High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice Nuclear Theory The spectrum of the $c qq$ baryons contains a few states whose nature is not clearly a three-quark composite and which might have a sizable baryon-meson component. Examples include the $Σ_c(2800)$ or the $Λ_c(2940)$. Here we explore the spectrum of two-body systems composed of a light, octet baryon and a charmed meson (or antimeson) within a simple contact-range theory in which the couplings are saturated by light-meson exchanges. This results in the prediction of a series of composite anticharmed pentaquarks ($\bar{c} q qqq $) and singly-charmed baryons ($c \bar{q} qqq $). Among the later we find $J=\tfrac{1}{2}$ $ΞD$ and $J=\tfrac{3}{2}$ $ΞD^*$ bound states with masses matching those of the recently observed $Ω_c(3185)$ and $Ω_c(3327)$ baryons. |
| title | Molecular charmed baryons and 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/2304.14855 |