Observation of New Charmonium or Charmoniumlike States in B+ →D∗±D∓K+ Decays
A study of resonant structures in Bþ → DþD−Kþ and Bþ → D−DþKþ decays is performed, using proton-proton collision data at center-of-mass energies of ffiffi s p ¼ 7, 8, and 13 TeV recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 fb−1. A simultaneous amplitude fit is perf...
| Autores: | , , , , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/221406 |
| Acceso en línea: | https://hdl.handle.net/2445/221406 |
| Access Level: | acceso abierto |
| Palabra clave: | Física de partícules Quarks Particle physics |
| Sumario: | A study of resonant structures in Bþ → DþD−Kþ and Bþ → D−DþKþ decays is performed, using proton-proton collision data at center-of-mass energies of ffiffi s p ¼ 7, 8, and 13 TeV recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 fb−1. A simultaneous amplitude fit is performed to the two channels with contributions from resonances decaying to D−Dþ and DþD− states linked by C parity. This procedure allows the C parities of resonances in the DD∓ mass spectra to be determined. Four charmonium or charmoniumlike states are observed decaying into DD∓: ηcð3945Þ, hcð4000Þ, χc1ð4010Þ, and hcð4300Þ, with quantum numbers JPC equal to 0−þ, 1þ−, 1þþ, and 1þ−, respectively. At least three of these states have not been observed previously. In addition, the existence of the T c¯ s¯ 0ð2870Þ0 and T c¯ s¯ 1ð2900Þ0 resonances in the D−Kþ mass spectrum, already observed in the Bþ → DþD−Kþ decay, is confirmed in a different production channel. |
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