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Branching fraction and CP asymmetry of the decays B+ → K0Sπ+ and B+ → K0SK+

An analysis of B+→KS0π+ and B+→KS0K+ decays is performed with the LHCb experiment. The pp collision data used correspond to integrated luminosities of 1 fb−1 and 2 fb−1 collected at centre-of-mass energies of s=7 TeV and s=8 TeV, respectively. The ratio of branching fractions and the direct CP asymm...

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Main Authors: Aaij, Roel (Author) , Aquines Gutiérrez, Osvaldo (Author) , Bachmann, Sebastian (Author) , Bien, Alexander (Author) , Blouw, Johan (Author) , Britsch, Markward (Author) , De Cian, Michel (Author) , Di Canto, Angelo (Author) , Dordei, Francesca (Author) , Färber, Christian (Author) , Fontana, Marianna (Author) , Gersabeck, Evelina (Author) , Grünberg, Oliver (Author) , Hansmann-Menzemer, Stephanie (Author) , Hartmann, Thomas (Author) , Heß, Miriam (Author) , Jäger, Andreas (Author) , Kreplin, Katharina (Author) , Krocker, Georg Alexander (Author) , Leverington, Blake (Author) , Linn, Christian (Author) , Marks, Jörg (Author) , Meißner, Marco (Author) , Nikodem, Thomas (Author) , Popov, Dmitry (Author) , Schmelling, Michael (Author) , Seyfert, Paul (Author) , Stahl, Sascha (Author) , Tilburg, Jeroen van (Author) , Uwer, Ulrich (Author) , Volyanskyy, D. (Author) , Voß, Christian (Author) , Voss, H. (Author) , Waldi, Roland (Author) , Wandernoth, Sebastian (Author) , Wiedner, Dirk (Author) , Zavertyaev, M. (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 30 September 2013
In: Physics letters
Year: 2013, Volume: 726, Issue: 4/5, Pages: 646-655
ISSN:1873-2445
DOI:10.1016/j.physletb.2013.09.046
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.physletb.2013.09.046
Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0370269313007776
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Author Notes:LHCb Collaboration
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Summary:An analysis of B+→KS0π+ and B+→KS0K+ decays is performed with the LHCb experiment. The pp collision data used correspond to integrated luminosities of 1 fb−1 and 2 fb−1 collected at centre-of-mass energies of s=7 TeV and s=8 TeV, respectively. The ratio of branching fractions and the direct CP asymmetries are measured to be B(B+→KS0K+)/B(B+→KS0π+)=0.064±0.009 (stat.)±0.004 (syst.), ACP(B+→KS0π+)=−0.022±0.025 (stat.)±0.010 (syst.) and ACP(B+→KS0K+)=−0.21±0.14 (stat.)±0.01 (syst.). The data sample taken at s=7 TeV is used to search for Bc+→KS0K+ decays and results in the upper limit (fc⋅B(Bc+→KS0K+))/(fu⋅B(B+→KS0π+))<5.8×10−2 at 90% confidence level, where fc and fu denote the hadronisation fractions of a b¯ quark into a Bc+ or a B+ meson, respectively.
Item Description:Im Titel sind ""+" und "0" hochgestellt und "S" tiefgestellt
LHCb Collaboration: R. Aaij, O. Aquines Gutierrez, S. Bachmann, A. Bien, J. Blouw, M. Britsch, M. De Cian, A. Di Canto, F. Dordei, C. Färber, M. Fontana, E. Gersabeck, O. Grünberg, S. Hansmann-Menzemer, T. Hartmann, M. Hess, A. Jaeger, K. Kreplin, G. Krocker, B. Leverington, C. Linn, J. Marks, M. Meissner, T. Nikodem, D. Popov, M. Schmelling, P. Seyfert, S. Stahl, J. van Tilburg, U. Uwer, D. Volyanskyy, C. Voß, H. Voss, R. Waldi, S. Wandernoth, D. Wiedner, M. Zavertyaev, A. Zhelezov und weitere 619
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Physical Description:Online Resource
ISSN:1873-2445
DOI:10.1016/j.physletb.2013.09.046

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