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Measurement of D0–D[bar]0 mixing parameters and search for CP violation using D0 → K+π− decays

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Measurements of charm mixing parameters from the decay-time-dependent ratio of D0→K+π− to D0→K−π+ rates and the charge-conjugate ratio are reported. The analysis uses data, corresponding to 3 fb−1 of integrated luminosity, from proton-proton collisions at 7 and 8 TeV center-of-mass energies recorded...

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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) , Grillo, Lucia (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: 18 December 2013
In: Physical review letters
Year: 2013, Volume: 111, Issue: 25, Pages: 1-9
ISSN:1079-7114
DOI:10.1103/PhysRevLett.111.251801
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevLett.111.251801
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.111.251801
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Author Notes:R. Aaij et al. (LHCb Collaboration)
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Summary:Measurements of charm mixing parameters from the decay-time-dependent ratio of D0→K+π− to D0→K−π+ rates and the charge-conjugate ratio are reported. The analysis uses data, corresponding to 3 fb−1 of integrated luminosity, from proton-proton collisions at 7 and 8 TeV center-of-mass energies recorded by the LHCb experiment. In the limit of charge-parity (CP ) symmetry, the mixing parameters are determined to be x'2=(5.5±4.9)×10−5, y′=(4.8±1.0)×10−3, and RD=(3.568±0.066)×10−3. Allowing for CP violation, the measurement is performed separately for D0 and D̄0 mesons yielding AD=(−0.7±1.9)%, for the direct CP-violating asymmetry, and 0.75<|q/p|<1.24 at the 68.3% confidence level, for the parameter describing CP violation in mixing. This is the most precise determination of these parameters from a single experiment and shows no evidence for CP violation.
Item Description:Im Titel sind "0", "+" und "-" hochgestellt
Im Titel steht der zweite Buchstabe D mit einem Oberstrich
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, L. Grillo, 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 621
Gesehen am 22.04.2021
Physical Description:Online Resource
ISSN:1079-7114
DOI:10.1103/PhysRevLett.111.251801

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