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Measurement of CP violation and the B0s meson decay width difference with B0s → J/ψK+K− and B0s → J/ψπ+π− decays

The time-dependent CP asymmetry in B0s→J/ψK+K− decays is measured using pp collision data at √s=7 TeV, corresponding to an integrated luminosity of 1.0 fb−1, collected with the LHCb detector. The decay-time distribution is characterized by the decay widths ΓL and ΓH of the light and heavy mass eigen...

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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) , 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) , 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: 21 June 2013
In: Physical review. D, Particles, fields, gravitation, and cosmology
Year: 2013, Volume: 87, Issue: 11, Pages: 1-21
ISSN:1550-2368
DOI:10.1103/PhysRevD.87.112010
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevD.87.112010
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.87.112010
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Author Notes:R. Aaij et al. (LHCb Collaboration)
Description
Summary:The time-dependent CP asymmetry in B0s→J/ψK+K− decays is measured using pp collision data at √s=7 TeV, corresponding to an integrated luminosity of 1.0 fb−1, collected with the LHCb detector. The decay-time distribution is characterized by the decay widths ΓL and ΓH of the light and heavy mass eigenstates of the B0s−B̄0s system and by a CP-violating phase ϕs. In a sample of 27 617 B0s→J/ψK+K− decays, where the dominant contribution comes from B0s→J/ψϕ decays, these parameters are measured to be ϕs=0.07±0.09(stat)±0.01(syst) rad, Γs≡(ΓL+ΓH)/2=0.663±0.005(stat)±0.006(syst) ps−1, and ΔΓs≡ΓL−ΓH=0.100±0.016(stat)±0.003(syst) ps−1, corresponding to the single most precise determination of ϕs, ΔΓs, and Γs. The result of performing a combined analysis with B0s→J/ψπ+π− decays gives ϕs=0.01±0.07(stat)±0.01(syst) rad, Γs=0.661±0.004(stat)±0.006(syst) ps−1, and ΔΓs=0.106±0.011(stat)±0.007(syst) ps−1. All measurements are in agreement with the Standard Model predictions.
Item Description:Im Titel sind "0", "+" und "-" hochgestellt und " s" tiefgestellt
LHCb Collaboration: R. Aaij, O. Aquines Gutierrez, S. Bachmann, A. Bien, J. Blouw, M. Britsch, A. Di Canto, F. Dordei, C. Färber, M. Fontana, E. Gersabeck, O. Grünberg, S. Hansmann-Menzemer, T. Hartmann, 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 586
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Physical Description:Online Resource
ISSN:1550-2368
DOI:10.1103/PhysRevD.87.112010

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