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Observation of the decays [lambda]0b→[chi]c1pK− and [lambda]0b→[chi]c2pK−

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The first observation of the decays Λ0b→χc1pK− and Λ0b→χc2pK− is reported using a data sample corresponding to an integrated luminosity of 3.0 fb−1, collected by the LHCb experiment in pp collisions at center-of-mass energies of 7 and 8 TeV. The following ratios of branching fractions are measured:...

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Main Authors: Aaij, Roel (Author) , D'Argent, Philippe (Author) , Bachmann, Sebastian (Author) , Braun, Svende (Author) , Comerma-Montells, Albert (Author) , De Cian, Michel (Author) , Dziewiecki, Michal (Author) , Esen, Sevda (Author) , Gerick, David (Author) , Gersabeck, Evelina (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Kecke, Matthieu (Author) , Khanji, Basem (Author) , Kopecná, Renata (Author) , Leverington, Blake (Author) , Marks, Jörg (Author) , Mitzel, Dominik (Author) , Neubert, Sebastian (Author) , Neuner, Max (Author) , Nikodem, Thomas (Author) , Piucci, Alessio (Author) , Stahl, Marian (Author) , Stemmle, Simon (Author) , Uwer, Ulrich (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 8 August 2017
In: Physical review letters
Year: 2017, Volume: 119, Issue: 6
ISSN:1079-7114
DOI:10.1103/PhysRevLett.119.062001
Online Access:Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevLett.119.062001
Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.119.062001
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Author Notes:R. Aaij et al. * (LHCb Collaboration)
Description
Summary:The first observation of the decays Λ0b→χc1pK− and Λ0b→χc2pK− is reported using a data sample corresponding to an integrated luminosity of 3.0 fb−1, collected by the LHCb experiment in pp collisions at center-of-mass energies of 7 and 8 TeV. The following ratios of branching fractions are measured: B(Λ0b→χc1pK−)B(Λ0b→J/ψpK−)=0.242±0.014±0.013±0.009,B(Λ0b→χc2pK−)B(Λ0b→J/ψpK−)=0.248±0.020±0.014±0.009,B(Λ0b→χc2pK−)B(Λ0b→χc1pK−)=1.02±0.10±0.02±0.05,where the first uncertainty is statistical, the second systematic, and the third due to the uncertainty on the branching fractions of the χc1→J/ψγ and χc2→J/ψγ decays. Using both decay modes, the mass of the Λ0b baryon is also measured to be mΛ0b=5619.44±0.28±0.26 MeV/c2, where the first and second uncertainties are statistical and systematic, respectively.
Item Description:Im Titel sind "lambda" und "chi" als griechische Buchstaben dargesetellt
Im Titel sind "0" und "b" übereinander geschrieben, wobei "0" oben und "b" unten steht
Im Titel sind "c1" und "c2" tiefgestellt
Im Titel ist "-" hochgestellt
The LHCb collaboration: R. Aaij, P. d'Argent, S. Bachmann, S. Braun, A. Comerma-Montells, M. De Cian, M. Dziewieck, S. Esen, D. Gerick, E. Gersabeck, X. Han, S. Hansmann-Menzemer, M. Kecke, B. Khanji, R. Kopecná, B. Leverington, J. Marks, D.S. Mitzel, S. Neubert, M. Neuner, T. Nikodem, A. Piucci, M. Schilller, S. Stahl, S. Stemmle, U. Uwer, R. Waldi, A. Zhelezov [und weitere]
Gesehen am 29.08.2018
Physical Description:Online Resource
ISSN:1079-7114
DOI:10.1103/PhysRevLett.119.062001

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