Observation of a resonant structure near the D+sD−s threshold in the B+→D+sD−sK+ decay
An amplitude analysis of the B+→D+sD−sK+ decay is carried out to study for the first time its intermediate resonant contributions, using proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV. A near-threshold peaking structure, referred to as X(...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , |
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| Körperschaft: | |
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
14 August 2023
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| In: |
Physical review letters
Year: 2023, Jahrgang: 131, Heft: 7, Pages: 1-12 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.131.071901 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1103/PhysRevLett.131.071901 Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.131.071901 
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| Verfasserangaben: | R. Aaij et al. (LHCb Collaboration)* |
MARC
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| 245 | 1 | 0 | |a Observation of a resonant structure near the D+sD−s threshold in the B+→D+sD−sK+ decay |c R. Aaij et al. (LHCb Collaboration)* |
| 246 | 3 | 3 | |a Observation of a resonant structure near the D + s D − s threshold in the B + → D + s D − s K + decay |
| 264 | 1 | |c 14 August 2023 | |
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| 500 | |a *(LHCb Collaboration): R. Aaij, F. Archilli, S. Bachmann, M. Borsato, R. Caspary, G. Frau, P.A. Günther, X. Han, S. Hansmann-Menzemer, J. Hu, B. Leverington, P. Li, J. Marks, D.J. Unverzagt, U. Uwer, L. Witola, A. Zhelezov [und 1048 Personen] | ||
| 500 | |a Im Titel sind die Zeichen + und - hochgestellt sowie der Buchstabe s tiefgestellt | ||
| 500 | |a Gesehen am 13.02.2024 | ||
| 520 | |a An amplitude analysis of the B+→D+sD−sK+ decay is carried out to study for the first time its intermediate resonant contributions, using proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV. A near-threshold peaking structure, referred to as X(3960), is observed in the D+sD−s invariant-mass spectrum with significance greater than 12 standard deviations. The mass, width, and the quantum numbers of the structure are measured to be 3956±5±10 MeV, 43±13±8 MeV, and JPC=0, respectively, where the first uncertainties are statistical and the second systematic. The properties of the new structure are consistent with recent theoretical predictions for a state composed of c¯cs¯s quarks. Evidence for an additional structure is found around 4140 MeV in the D+sD−s invariant mass, which might be caused either by a new resonance with the 0++ assignment or by a J/ψϕ↔D+sD−s coupled-channel effect. | ||
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