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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, et al. Observation of a New Excited Ds+ Meson in B0 →d-D+K+π-Decays. Physical Review Letters. 2021. Vol. 2021, num. 1-11. ISSN 0031-9007. [consulted: 18 of August of 2026]. Available at: https://hdl.handle.net/2445/185489