Study of the B-→Λ+cΛ[bar]-cK- decay
The decay B−→Λ+c¯Λ−cK− is studied in proton-proton collisions at a center-of-mass energy of √s=13 TeV using data corresponding to an integrated luminosity of 5 fb−1 collected by the LHCb experiment. In the Λ+cK− system, the Ξc(2930)0 state observed at the BABAR and Belle experiments is resolved into...
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
27 July 2023
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| In: |
Physical review
Year: 2023, Jahrgang: 108, Heft: 1, Pages: 012020-1-012020-15 |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.108.012020 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1103/PhysRevD.108.012020 Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.108.012020 
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| Verfasserangaben: | R. Aaij et al. (LHCb Collaboration) |
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| 245 | 1 | 0 | |a Study of the B-→Λ+cΛ[bar]-cK- decay |c R. Aaij et al. (LHCb Collaboration) |
| 246 | 3 | 3 | |a Study of the B - → Lambda + c Lambda bar - c K - decay |
| 264 | 1 | |c 27 July 2023 | |
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| 300 | |a 15 | ||
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| 500 | |a Im Titel sind der Buchstabe c tief- sowie die Zeichen + und - hochgestellt | ||
| 500 | |a *(LHCb Collaboration): R. Aaij, F. Archilli, S. Bachmann, D. Berninghoff, M. Borsato, R. Caspary, G. Frau, J. P. Grabowski, P.A. Günther, X. Han, S. Hansmann-Menzemer, J. Hu, R. Kopenca, J. Kubat, B. Leverington, P. Li, J. Marks, M. Mikhasenko, S. Neubert, K.O. Padeken, L. Promberger, M. Sarpis, R. Skuza, D.J. Unverzagt, U. Uwer, R. Waldi, C. Wang, L. Witola, A. Zhelezov [und weitere 1050 Personen] | ||
| 500 | |a Gesehen am 13.05.2024 | ||
| 520 | |a The decay B−→Λ+c¯Λ−cK− is studied in proton-proton collisions at a center-of-mass energy of √s=13 TeV using data corresponding to an integrated luminosity of 5 fb−1 collected by the LHCb experiment. In the Λ+cK− system, the Ξc(2930)0 state observed at the BABAR and Belle experiments is resolved into two narrower states, Ξc(2923)0 and Ξc(2939)0, whose masses and widths are measured to be m(Ξc(2923)0)=2924.5±0.4±1.1 MeV, m(Ξc(2939)0)=2938.5±0.9±2.3 MeV, Γ(Ξc(2923)0)=4.8±0.9±1.5 MeV, Γ(Ξc(2939)0)=11.0±1.9±7.5 MeV, where the first uncertainties are statistical and the second systematic. The results are consistent with a previous LHCb measurement using a prompt Λ+cK− sample. Evidence of a new Ξc(2880)0 state is found with a local significance of 3.8σ, whose mass and width are measured to be 2881.8±3.1±8.5 MeV and 12.4±5.3±5.8 MeV, respectively. In addition, evidence of a new decay mode Ξc(2790)0→Λ+cK− is found with a significance of 3.7σ. The relative branching fraction of B−→Λ+c¯Λ−cK− with respect to the B−→D+D−K− decay is measured to be 2.36±0.11±0.22±0.25, where the first uncertainty is statistical, the second systematic and the third originates from the branching fractions of charm hadron decays.13.05.2024 | ||
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