First observation of the ¯B0s → Λ+c ¯Λ−c decay and evidence for the ¯B0 → Λ+c ¯Λ−c decayy
A search is presented for the two-body charmed baryonic decays, ¯𝐵0(𝑠)→Λ+𝑐¯Λ−𝑐, using a data sample collected by the LHCb experiment during 2011-2012 and 2015-2018, corresponding to an integrated luminosity of 9 fb−1. The first observation of the ¯𝐵0𝑠→Λ+𝑐¯Λ−𝑐 decay is reported with 6.2𝜎 significa...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Körperschaft: | |
| Dokumenttyp: | Article (Journal) Editorial |
| Sprache: | Englisch |
| Veröffentlicht: |
13 February, 2026
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| In: |
Physical review letters
Year: 2026, Jahrgang: 136, Heft: 6, Pages: 1-14 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/cxn3-8t4g |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1103/cxn3-8t4g Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/cxn3-8t4g |
| Verfasserangaben: | R. Aaij et al. (LHCb Collaboration*) |
| Zusammenfassung: | A search is presented for the two-body charmed baryonic decays, ¯𝐵0(𝑠)→Λ+𝑐¯Λ−𝑐, using a data sample collected by the LHCb experiment during 2011-2012 and 2015-2018, corresponding to an integrated luminosity of 9 fb−1. The first observation of the ¯𝐵0𝑠→Λ+𝑐¯Λ−𝑐 decay is reported with 6.2𝜎 significance along with 4.3𝜎 evidence for the ¯𝐵0→Λ+𝑐¯Λ−𝑐 decay. The branching fractions are measured to be ℬ(¯𝐵0→Λ+𝑐¯Λ−𝑐)=(1.01+0.27−0.28±0.08±0.15)×10−5 and ℬ(¯𝐵0𝑠→Λ+𝑐¯Λ−𝑐)=(5.0±1.3±0.5±0.8)×10−5, where the first uncertainty is statistical, the second systematic, and the third due to external inputs. These results provide novel experimental inputs for the theoretical framework describing two-body baryonic decays of 𝐵 mesons via 𝑊-emission and 𝑊-exchange mechanisms. |
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| Beschreibung: | Veröffentlicht: 13. Februar 2026 Im Titel steht der Buchstabe B jeweils sowie das zweite Lambda mit einem Oberstrich, die Plus- und Minuszeichen sowie die Zahl 0 sind hochgestellt, die Buchstaben s und c tiefgestellt *LHCb Collaboration: R. Aaij, S. Bachmann, L. Carus, R. Caspary, C. Cocha Toapaxi, L. Dittmann, F.C. Glaser, X. Han, S. Hansmann-Menzemer, P. Herrero Gascon, R. Kolb, C. Langenbruch, B. Leverington, J. Marks, M.P. Morgenthaler, M. Ruiz Diaz, M. Schiller, M.D. Tat, G. Tuci, L.H. Uecker, U. Uwer, C. Wang, T. Wolf, Y. Zhao, A. Zhelezov [und 1183 weitere Personen] Gesehen am 20.04.2026 |
| Beschreibung: | Online Resource |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/cxn3-8t4g |