Open charm tetraquarks in broken SU(3)_F symmetry
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| Format: | Preprint |
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2024
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| _version_ | 1866916320288702464 |
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| author | Maiani, L. Polosa, A. D. Riquer, V. |
| author_facet | Maiani, L. Polosa, A. D. Riquer, V. |
| contents | Prompted by a recent lattice QCD calculation, we review the SU(3) light quark flavor structure of charmed tetraquarks with spin-0 diquarks. Fermi statistics forces the three light quarks to be in the representation 3*x3*= 3+6*. This agrees with the weak repulsion in the 15 of the 3x8 in Dbar K scattering studied on the lattice. We analyze the 3+6* multiplet broken by the strange quark mass and determine the five independent masses from the known masses of diquarks. The mass of D^* _{s0}(2317) is predicted within 50 MeV accuracy. The recently observed D_s^{--}(2900) and D_s^{0}(2900), likely part of a I=1 multiplet, with flavor composition c* q* q' s and X_0(2900), an isosinglet with flavor composition c*s* ud, fit naturally in a 3+6* structure as the first radial excitations. We discuss also the decay modes of D^* _{s0}(2317), of the radial excitations and of the predicted particles. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2405_08545 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Open charm tetraquarks in broken SU(3)_F symmetry Maiani, L. Polosa, A. D. Riquer, V. High Energy Physics - Phenomenology Prompted by a recent lattice QCD calculation, we review the SU(3) light quark flavor structure of charmed tetraquarks with spin-0 diquarks. Fermi statistics forces the three light quarks to be in the representation 3*x3*= 3+6*. This agrees with the weak repulsion in the 15 of the 3x8 in Dbar K scattering studied on the lattice. We analyze the 3+6* multiplet broken by the strange quark mass and determine the five independent masses from the known masses of diquarks. The mass of D^* _{s0}(2317) is predicted within 50 MeV accuracy. The recently observed D_s^{--}(2900) and D_s^{0}(2900), likely part of a I=1 multiplet, with flavor composition c* q* q' s and X_0(2900), an isosinglet with flavor composition c*s* ud, fit naturally in a 3+6* structure as the first radial excitations. We discuss also the decay modes of D^* _{s0}(2317), of the radial excitations and of the predicted particles. |
| title | Open charm tetraquarks in broken SU(3)_F symmetry |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2405.08545 |