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Observation of B0→D̄0K+K− and evidence for B0s→D̄0K+K−

The first observation of the decay B0→¯¯¯D0K+K− is reported from an analysis of 0.62 fb−1 of pp collision data collected with the LHCb detector. Its branching fraction is measured relative to that of the topologically similar decay B0→¯¯¯D0π+π− to be B(B0→¯¯¯D0K+K−)B(B0→¯¯¯D0π+π−)=0.056±0.011±0.007,...

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Main Authors: Aaij, Roel (Author) , Adametz, Aleksandra (Author) , Bachmann, Sebastian (Author) , Bien, Alexander (Author) , Britsch, Markward (Author) , Blouw, Johan (Author) , Dordei, Francesca (Author) , Eisele, Franz (Author) , Färber, Christian (Author) , Gersabeck, Evelina (Author) , Hansmann-Menzemer, Stephanie (Author) , Hartmann, Tobias (Author) , Jäger, Andreas (Author) , Kreplin, Katharina (Author) , Krocker, Georg Alexander (Author) , Krokovny, Pavel (Author) , Langenbruch, Christoph (Author) , Linn, Christian (Author) , Marks, Jörg (Author) , Meißner, Marco (Author) , Nikodem, Thomas (Author) , Seyfert, Paul (Author) , Stahl, Sascha (Author) , Tilburg, Jeroen van (Author) , Uwer, Ulrich (Author) , Wandernoth, Sebastian (Author) , Wiedner, Dirk (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 26 September 2012
In: Physical review letters
Year: 2012, Volume: 109, Issue: 13
ISSN:1079-7114
DOI:10.1103/PhysRevLett.109.131801
Online Access:Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevLett.109.131801
Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.109.131801
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Author Notes:R. Aaij et al.* (LHCb Collaboration)
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Summary:The first observation of the decay B0→¯¯¯D0K+K− is reported from an analysis of 0.62 fb−1 of pp collision data collected with the LHCb detector. Its branching fraction is measured relative to that of the topologically similar decay B0→¯¯¯D0π+π− to be B(B0→¯¯¯D0K+K−)B(B0→¯¯¯D0π+π−)=0.056±0.011±0.007,where the first uncertainty is statistical and the second is systematic. The significance of the signal is 5.8σ. Evidence, with 3.8σ significance, for B0s→¯¯¯D0K+K− decays is also presented. The relative branching fraction is measured to be B(B0s→¯¯¯D0K+K−)B(B0→¯¯¯D0K+K−)=0.90±0.27±0.20. These channels are of interest to study the mechanisms behind hadronic B decays, and open new possibilities for CP violation analyses with larger data sets.
Item Description:Im Titel sind "0" und "s" untereinander geschrieben: "s" ist tiefgestellt, "0" hochgestellt
Im Titel sind die Zeichen "null", "plus" und "minus" hochgestellt
The LHCb Collaboration: R. Aaij, A. Adametz, S. Bachmann, A. Bien, J. Blouw, M. Britsch,F. Dordei, F. Eisele, C. Fäber, E. Gersabeck, S. Hansmann-Menzemer, T. Hartmann, A. Jaeger, K. Kreplin, G. Krocker, P. Krokovny, C. Langenbruch, C. Linn, J. Marks, M. Meissner, T. Nikodem, P. Seyfert, S. Stahl, J. v. Tilburg, U. Uwer, S. Wandernoth, D. Wiedner, A. Zhelezov [und weitere]
Gesehen am 24.10.2018
Physical Description:Online Resource
ISSN:1079-7114
DOI:10.1103/PhysRevLett.109.131801

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