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Observation of the Λ0b→ J/ψ Ξ−K+ and Ξ0b→ J/ψΞ−π+ decays

The first observation of the Ξ0b → J/ψΞ−π+ decay and the most precise measurement of the branching fraction of the Λ0b → J/ψΞ−K+ decay are reported, using proton-proton collision data from the LHCb experiment collected in 2016–2018 at a centre-of-mass energy of 13TeV, corresponding to an integrated...

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Autori principali: Aaij, Roel (Autore) , Bachmann, Sebastian (Autore) , Carus, Leon (Autore) , Caspary, Rowina (Autore) , Celani, Sara (Autore) , Cocha Toapaxi, Carlos (Autore) , De Cian, Michel (Autore) , Dittmann, Lucas (Autore) , Esen, Sevda (Autore) , Glaser, Fabian (Autore) , Günther, Paul André (Autore) , Han, Xiaoxue (Autore) , Hansmann-Menzemer, Stephanie (Autore) , Herrero Gascón, Paula (Autore) , Langenbruch, Christoph (Autore) , Leverington, Blake (Autore) , Marks, Jörg (Autore) , Morgenthaler, Maurice Pierre (Autore) , Roy, Shreya (Autore) , Ruiz Diaz, Miguel (Autore) , Tat, Martin Duy (Autore) , Tuci, Giulia (Autore) , Uecker, Lennart Henning (Autore) , Unverzagt, Daniel Joachim (Autore) , Uwer, Ulrich (Autore) , Wang, Chishuai (Autore) , Witola, Lukas (Autore) , Zhao, Ya (Autore) , Zhelezov, Alexey (Autore)
Ente Autore: LHCb Collaboration (Autore)
Natura: Article (Journal)
Lingua:inglese
Pubblicazione: 28 July 2025
In: The European physical journal. C, Particles and fields
Year: 2025, Volume: 85, Fascicolo: 7, Pages: 1-15
ISSN:1434-6052
DOI:10.1140/epjc/s10052-025-14129-6
Accesso online:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epjc/s10052-025-14129-6
Testo
Note sull'autore:LHCb Collaboration*
Descrizione
Riassunto:The first observation of the Ξ0b → J/ψΞ−π+ decay and the most precise measurement of the branching fraction of the Λ0b → J/ψΞ−K+ decay are reported, using proton-proton collision data from the LHCb experiment collected in 2016–2018 at a centre-of-mass energy of 13TeV, corresponding to an integrated luminosity of 5.4 fb−1. Using the Λ0b → J/ψΛ and Ξ−b → J/ψΞ− decays as normalisation channels, the ratios of branching fractions are measured to be B(Λ0b → J/ψΞ−K+) B(Λ0b → J/ψΛ) = (1.17 ± 0.14 ± 0.08) × 10−2 , B(Ξ0b → J/ψΞ−π+) B(Ξ−b → J/ψΞ−) = (11.9 ± 1.4 ± 0.6) × 10−2, where the first uncertainty is statistical and the second systematic.
Descrizione del documento:Online veröffentlicht: 28. Juli 2025
Im Titel ist die Zahl 0 jeweils hochgestellt, der Buchstabe b tiefgestellt, dabei steht 0 über b, die Plus- und Minuszeichen sind jeweils hochgestellt
*LHCb Collaboration: R. Aaij, S. Bachmann, L. Carus, R. Caspary, S. Celani, C. Cocha Toapaxi, M. De Cian, L. Dittmann, S. Esen, F.C. Glaser, P.A. Günther, X. Han, S. Hansmann-Menzemer, P. Herrero Gascon, C. Langenbruch, B. Leverington, J. Marks, M.P. Morgenthaler, S.R. Roy, M. Ruiz Diaz, M.D. Tat, G. Tuci, L.H. Uecker, D.J. Unverzagt, U. Uwer, C. Wang, L. Witola, Y. Zhao, A. Zhelezov [und sehr viele weitere Personen]
Gesehen am 07.01.2026
Descrizione fisica:Online Resource
ISSN:1434-6052
DOI:10.1140/epjc/s10052-025-14129-6

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