Exotics in the $πD$ system
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arXiv
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| Hauptverfasser: | , , , , |
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| Format: | Preprint |
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2021
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| _version_ | 1866908354571403264 |
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| author | Gregory, Eric B. Guo, Feng-Kun Hanhart, Christoph Krieg, Stefan Luu, Thomas |
| author_facet | Gregory, Eric B. Guo, Feng-Kun Hanhart, Christoph Krieg, Stefan Luu, Thomas |
| contents | In this proceedings we consider several states, namely the $D^*_{s0}(2317)$, $D_{s1}(2460)$, $D^*_{0}(2300)$ and $D_{1}(2430)$, which appear to defy description as simple quark-antiquark pairs. Theoretical input from unitarized chiral perturbation theory suggests they can be understood as emerging from Goldstone-Boson--$D$-meson scattering. We present results from an $SU(3)$ flavor-symmetric lattice QCD simulation at large pion masses suggesting that there exists a $πD$ bound state in the flavor-sextet representation that cannot emerge for quark-antiquark states, but that appears naturally from the multiquark states. Moreover, we find repulsion in the [15] representation, which establishes the pattern predicted for the interactions of Goldstone bosons with $D$ mesons. This suggests these states may have the structure of hadronic molecules. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2111_15544 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Exotics in the $πD$ system Gregory, Eric B. Guo, Feng-Kun Hanhart, Christoph Krieg, Stefan Luu, Thomas High Energy Physics - Lattice High Energy Physics - Phenomenology In this proceedings we consider several states, namely the $D^*_{s0}(2317)$, $D_{s1}(2460)$, $D^*_{0}(2300)$ and $D_{1}(2430)$, which appear to defy description as simple quark-antiquark pairs. Theoretical input from unitarized chiral perturbation theory suggests they can be understood as emerging from Goldstone-Boson--$D$-meson scattering. We present results from an $SU(3)$ flavor-symmetric lattice QCD simulation at large pion masses suggesting that there exists a $πD$ bound state in the flavor-sextet representation that cannot emerge for quark-antiquark states, but that appears naturally from the multiquark states. Moreover, we find repulsion in the [15] representation, which establishes the pattern predicted for the interactions of Goldstone bosons with $D$ mesons. This suggests these states may have the structure of hadronic molecules. |
| title | Exotics in the $πD$ system |
| topic | High Energy Physics - Lattice High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2111.15544 |