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First branching fraction measurement of the suppressed decay [Xi]0c →π- [Lambda]+c

The Ξ0c baryon is unstable and usually decays into charmless final states by the c→su¯d transition. It can, however, also disintegrate into a π− meson and a Λ+c baryon via s quark decay or via cs→dc weak scattering. The interplay between the latter two processes governs the size of the branching fra...

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Main Authors: Aaij, Roel (Author) , Archilli, Flavio (Author) , Bachmann, Sebastian (Author) , Berninghoff, Daniel (Author) , Borsato, Martino (Author) , Dziewiecki, Michal (Author) , Frau, Giulia (Author) , Gerick, David (Author) , Grabowski, Jascha (Author) , Günther, Paul André (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Hu, Jiangqiao (Author) , Kecke, Matthieu (Author) , Kopecná, Renata (Author) , Leverington, Blake (Author) , Li, Peilian (Author) , Malygina, Hanna (Author) , Marks, Jörg (Author) , Neubert, Sebastian (Author) , Piucci, Alessio (Author) , Sarpis, Mindaugas (Author) , Schmelling, Michael (Author) , Skidmore, Nicola (Author) , Stemmle, Simon (Author) , Unverzagt, Daniel Joachim (Author) , Uwer, Ulrich (Author) , Viemann, Harald (Author) , Waldi, Roland (Author) , Wang, Chishuai (Author) , Witola, Lukas (Author) , Zavertyaev, M. (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 12 October 2020
In: Physical review
Year: 2020, Volume: 102, Issue: 7
ISSN:2470-0029
DOI:10.1103/PhysRevD.102.071101
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevD.102.071101
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.102.071101
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Author Notes:R. Aaij et al. (LHCb Collaboration), F. Archilli, S. Bachmann, D. Berninghoff, M. Borsato, M. Dziewiecki, G. Frau, D. Gerick, J.P. Grabowski, P.A. Günther, X. Han, S. Hansmann-Menzemer, J. Hu, R. Kopecna, B. Leverington, P. Li, H. Malygina, J. Marks, S. Neubert, A. Piucci, M. Sarpis, M. Schmelling, N. Skidmore, S. Stemmle, D.J. Unverzagt, U. Uwer, H. Viemann, R. Waldi, C. Wang, L. Witola, M. Zavertyaev, A. Zhelezov, und weitere 940
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Summary:The Ξ0c baryon is unstable and usually decays into charmless final states by the c→su¯d transition. It can, however, also disintegrate into a π− meson and a Λ+c baryon via s quark decay or via cs→dc weak scattering. The interplay between the latter two processes governs the size of the branching fraction B(Ξ0c→π−Λ+c), first measured here to be (0.55±0.02±0.18)%, where the first uncertainty is statistical and second systematic. This result is compatible with the larger of the theoretical predictions that connect models of hyperon decays using partially conserved axial currents and SU(3) symmetry with those involving the heavy-quark expansion and heavy-quark symmetry. In addition, the branching fraction of the normalization channel, B(Ξ+c→pK−π+)=(1.135±0.002±0.387)% is measured.
Item Description:Im Titel ist "Xi" als griechischer Buchstabe dargestellt
Im Titel ist "Lambda" als griechischer Buchstabe dargestellt
Im Titel sind "0", "-" und "+" hochgestellt und "c" in [Xi]0c →π- [Lambda]+c jeweils tiefgestellt
Gesehen am 17.11.2020
Physical Description:Online Resource
ISSN:2470-0029
DOI:10.1103/PhysRevD.102.071101

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