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Observation of the [Lambda]0b→ J[psi]/[Xi]−K+ and [Xi]0b→ J/[psi][Xi]−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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Main Authors: Aaij, Roel (Author) , Bachmann, Sebastian (Author) , Carus, Leon (Author) , Caspary, Rowina (Author) , Celani, Sara (Author) , Cocha Toapaxi, Carlos (Author) , De Cian, Michel (Author) , Dittmann, Lucas (Author) , Esen, Sevda (Author) , Glaser, Fabian (Author) , Günther, Paul André (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Herrero Gascón, Paula (Author) , Langenbruch, Christoph (Author) , Leverington, Blake (Author) , Marks, Jörg (Author) , Morgenthaler, Maurice Pierre (Author) , Roy, Shreya (Author) , Ruiz Diaz, Miguel (Author) , Tat, Martin Duy (Author) , Tuci, Giulia (Author) , Uecker, Lennart Henning (Author) , Unverzagt, Daniel Joachim (Author) , Uwer, Ulrich (Author) , Wang, Chishuai (Author) , Witola, Lukas (Author) , Zhao, Ya (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 28 July 2025
In: The European physical journal. C, Particles and fields
Year: 2025, Volume: 85, Issue: 7, Pages: 1-15
ISSN:1434-6052
DOI:10.1140/epjc/s10052-025-14129-6
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epjc/s10052-025-14129-6
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Author Notes:LHCb Collaboration*
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Summary: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.
Item Description:Online veröffentlicht: 28. Juli 2025
Im Titel sind die Zahl 0 sowie die Plus- und Minuszeichen hochgestellt
Im Titel ist der Buchstabe "b" tiefgestellt
*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]
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Physical Description:Online Resource
ISSN:1434-6052
DOI:10.1140/epjc/s10052-025-14129-6

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