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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/221406
Observation of New Charmonium or Charmoniumlike States in B+ →D∗±D∓K+ Decays
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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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LHCb Collaboration, CALEFICE, Lukas, COMERMA MONTELLS, Albert, GARCIA MORENO, Paula, GARRIDO BELTRÁN, Lluís, GIOVENTÙ, Alessandra, GIRONELLA GIRONELL, Pere, GOMEZ FERNANDEZ, Sergio, GRAUGÉS POUS, Eugeni, LOBO SALVIA, Aniol, LÓPEZ HUERTAS, Albert, MANERA ESCALERO, Rafel, MARIN BENITO, Carla, MAURICIO FERRE, Joan, VAZQUEZ GOMEZ, Ricardo. Observation of New Charmonium or Charmoniumlike States in B+ →D∗±D∓K+ Decays. _Physical Review Letters_. 2024. Vol. 133, núm. 13. [consulta: 20 de gener de 2026]. ISSN: 0031-9007. [Disponible a: https://hdl.handle.net/2445/221406]