Functional methods for hadron spectroscopy
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866917968533782528 |
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| author | Eichmann, Gernot Fischer, Christian S. Hoffer, Joshua |
| author_facet | Eichmann, Gernot Fischer, Christian S. Hoffer, Joshua |
| contents | We summarize recent results for four-quark states with hidden and open flavor obtained from a four-quark Bethe-Salpeter/Faddeev-Yakubowsky equation. The approach dynamically predicts the leading internal two-body clusters such as meson-meson, hadroquarkonium or diquark-antidiquark components. For hidden-flavor states, the meson-meson or hadroquarkonium configurations are dominant, while the diquark contributions are small. For open-flavor states, the situation is different and depends on the quark content: The $T_{bb}^-$ is a mixture of various components, where the diquark-antidiquark components are dominant, whereas the $T_{cc}^+$ is practically entirely dominated by $DD^\ast$ due to its proximity to the threshold. We also provide details on the analytic continuations and extrapolations to extract states above thresholds. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_20718 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Functional methods for hadron spectroscopy Eichmann, Gernot Fischer, Christian S. Hoffer, Joshua High Energy Physics - Phenomenology We summarize recent results for four-quark states with hidden and open flavor obtained from a four-quark Bethe-Salpeter/Faddeev-Yakubowsky equation. The approach dynamically predicts the leading internal two-body clusters such as meson-meson, hadroquarkonium or diquark-antidiquark components. For hidden-flavor states, the meson-meson or hadroquarkonium configurations are dominant, while the diquark contributions are small. For open-flavor states, the situation is different and depends on the quark content: The $T_{bb}^-$ is a mixture of various components, where the diquark-antidiquark components are dominant, whereas the $T_{cc}^+$ is practically entirely dominated by $DD^\ast$ due to its proximity to the threshold. We also provide details on the analytic continuations and extrapolations to extract states above thresholds. |
| title | Functional methods for hadron spectroscopy |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2503.20718 |