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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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Autori principali: Aaij, Roel (Autore) , Archilli, Flavio (Autore) , Bachmann, Sebastian (Autore) , Borsato, Martino (Autore) , Caspary, Rowina (Autore) , Frau, Giulia (Autore) , Günther, Paul André (Autore) , Han, Xiaoxue (Autore) , Hansmann-Menzemer, Stephanie (Autore) , Hu, Jiangqiao (Autore) , Leverington, Blake (Autore) , Li, Peilian (Autore) , Marks, Jörg (Autore) , Unverzagt, Daniel Joachim (Autore) , Uwer, Ulrich (Autore) , Witola, Lukas (Autore) , Zhelezov, Alexey (Autore)
Ente Autore: LHCb Collaboration (Autore)
Natura: Article (Journal)
Lingua:inglese
Pubblicazione: 14 August 2023
In: Physical review letters
Year: 2023, Volume: 131, Fascicolo: 7, Pages: 1-12
ISSN:1079-7114
DOI:10.1103/PhysRevLett.131.071901
Accesso online:Verlag, kostenfrei, Volltext: https://doi.org/10.1103/PhysRevLett.131.071901
Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.131.071901
Testo
Note sull'autore:R. Aaij et al. (LHCb Collaboration)*
Descrizione
Riassunto: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.
Descrizione del documento:*(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]
Im Titel sind die Zeichen + und - hochgestellt sowie der Buchstabe s tiefgestellt
Gesehen am 13.02.2024
Descrizione fisica:Online Resource
ISSN:1079-7114
DOI:10.1103/PhysRevLett.131.071901

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