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Observation of the [xi]-b→J/[psi][lambda]K− decay

The observation of the decay Ξb−→J/ψΛK− is reported, using a data sample corresponding to an integrated luminosity of 3fb−1, collected by the LHCb detector in pp collisions at centre-of-mass energies of 7 and 8TeV. The production rate of Ξb− baryons detected in the decay Ξb−→J/ψΛK− is measured relat...

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Main Authors: Aaij, Roel (Author) , D'Argent, Philippe (Author) , Bachmann, Sebastian (Author) , Braun, Svende (Author) , Britsch, Markward (Author) , Comerma-Montells, Albert (Author) , De Cian, Michel (Author) , Esen, Sevda (Author) , Gerick, David (Author) , Gersabeck, Evelina (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Kecke, Matthieu (Author) , Khanji, Basem (Author) , Kolpin, Michael (Author) , Kreplin, Katharina (Author) , Leverington, Blake (Author) , Marks, Jörg (Author) , Meißner, Marco (Author) , Mitzel, Dominik (Author) , Neubert, Sebastian (Author) , Neuner, Max (Author) , Nikodem, Thomas (Author) , Piucci, Alessio (Author) , Schiller, Manuel (Author) , Seyfert, Paul (Author) , Stahl, Marian (Author) , Stemmle, Simon (Author) , Tilburg, Jeroen van (Author) , Uwer, Ulrich (Author) , Vesterinen, Mika (Author) , Waldi, Roland (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 26 June 2017
In: Physics letters
Year: 2017, Volume: 772, Pages: 265-273
ISSN:1873-2445
DOI:10.1016/j.physletb.2017.06.045
Online Access:Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1016/j.physletb.2017.06.045
Verlag, kostenfrei, Volltext: http://www.sciencedirect.com/science/article/pii/S037026931730521X
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Author Notes:the LHCb Collaboration
Description
Summary:The observation of the decay Ξb−→J/ψΛK− is reported, using a data sample corresponding to an integrated luminosity of 3fb−1, collected by the LHCb detector in pp collisions at centre-of-mass energies of 7 and 8TeV. The production rate of Ξb− baryons detected in the decay Ξb−→J/ψΛK− is measured relative to that of Λb0 baryons using the decay Λb0→J/ψΛ. Integrated over the b-baryon transverse momentum pT<25GeV/c and rapidity 2.0<y<4.5, the measured ratio isfΞb−fΛb0B(Ξb−→J/ψΛK−)B(Λb0→J/ψΛ)=(4.19±0.29 (stat)±0.15 (syst))×10−2, where fΞb− and fΛb0 are the fragmentation fractions of b→Ξb− and b→Λb0 transitions, and B represents the branching fraction of the corresponding b-baryon decay. The mass difference between Ξb− and Λb0 baryons is measured to beM(Ξb−)−M(Λb0)=177.08±0.47 (stat)±0.16 (syst)MeV/c2.
Item Description:LHCb Collaboration: R. Aaij, P. d’Argent, S. Bachmann, S. Braun, M. Britsch, A. Comerma-Montells, M. De Cian, S. Esen, D.Gerick, E. Gersabeck, X.Han, S. Hansmann-Menzemer, M. Kecke, B. Khanji, M. Kolpin, K. Kreplin, B. Leverington, J. Marks, M. Meissner, D.S. Mitzel, S. Neubert, M. Neuner, T. Nikodem, A. Piucci, P. Seyfert, M. Schiller, M. Stahl, S. Stemmle, J. v. Tilburg, U. Uwer, M. Vesterinen, R. Waldi, A. Zhelezov [und weitere]
Im Titel ist das Minus-Zeichen hoch- und das "b" tiefgestellt
Im Titel werden "Xi", "psi" und "Lambda" als griechische Buchstaben dargestellt
Gesehen am 30.10.2018
Physical Description:Online Resource
ISSN:1873-2445
DOI:10.1016/j.physletb.2017.06.045

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