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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/185489

Observation of a New Excited Ds+ Meson in B0 →d-D+K+π-Decays

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Using pp collision data corresponding to an integrated luminosity of 5.4 fb−1 collected with the LHCb detector at a center-of-mass energy of 13 TeV, the B0 → D−DþKþπ− decay is studied. A new excited Dþ s meson is observed decaying into the DþKþπ− final state with large statistical significance. The pole mass and width, and the spin parity of the new state are measured with an amplitude analysis to be mR ¼ 2591 6 7 MeV, ΓR ¼ 89 16 12 MeV, and JP ¼ 0−, where the first uncertainty is statistical and the second systematic. Fit fractions for all components in the amplitude analysis are also reported. The new resonance, denoted as Ds0ð2590Þþ, is a strong candidate to be the Dsð21 S0Þþ state, the radial excitation of the pseudoscalar ground-state Dþ s meson.

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LHCb Collaboration, GARCÍA MORENO, Paula, GARRIDO BELTRÁN, Lluís, GIRONELLA GIRONELL, P., GOMEZ FERNANDEZ, S., GRAUGÉS POUS, Eugeni, LOBO SALVIA, A., MAURICIO, J., VAZQUEZ GOMEZ, R., MARIN BENITO, Carla. Observation of a New Excited Ds+ Meson in B0 →d-D+K+π-Decays. _Physical Review Letters_. 2021. Vol. 2021, núm. 1-11. [consulta: 25 de gener de 2026]. ISSN: 0031-9007. [Disponible a: https://hdl.handle.net/2445/185489]

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