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Measurements of indirect CP asymmetries in D0→K-K+ and D0→π-π+ decays

A study of indirect CP violation in D0 mesons through the determination of the parameter AΓ is presented using a data sample of pp collisions, corresponding to an integrated luminosity of 1.0 fb−1, collected with the LHCb detector and recorded at the center-of-mass energy of 7 TeV at the LHC. The pa...

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Main Authors: Aaij, Roel (Author) , Bien, Alexander (Author) , Britsch, Markward (Author) , De Cian, Michel (Author) , Di Canto, Angelo (Author) , Dordei, Francesca (Author) , Färber, Christian (Author) , Gersabeck, Evelina (Author) , Grillo, Lucia (Author) , Hansmann-Menzemer, Stephanie (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) , Seyfert, Paul (Author) , Stahl, Sascha (Author) , Tilburg, Jeroen van (Author) , Uwer, Ulrich (Author) , Vesterinen, Mika (Author) , Wandernoth, Sebastian (Author) , Wiedner, Dirk (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Other Authors: Bachmann, Sebastian (Other)
Format: Article (Journal)
Language:English
Published: 31 January 2014
In: Physical review letters
Year: 2014, Volume: 112, Issue: 4
ISSN:1079-7114
DOI:10.1103/PhysRevLett.112.041801
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevLett.112.041801
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.112.041801
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Author Notes:R. Aaij et al.* (LHCb Collaboration)
Description
Summary:A study of indirect CP violation in D0 mesons through the determination of the parameter AΓ is presented using a data sample of pp collisions, corresponding to an integrated luminosity of 1.0 fb−1, collected with the LHCb detector and recorded at the center-of-mass energy of 7 TeV at the LHC. The parameter AΓ is the asymmetry of the effective lifetimes measured in decays of D0 and ¯D0 mesons to the CP eigenstates K−K+ and π−π+. Fits to the data sample yield AΓ(KK)=(−0.35±0.62±0.12)×10−3 and AΓ(ππ)=(0.33±1.06±0.14)×10−3, where the first uncertainties are statistical and the second systematic. The results represent the world’s best measurements of these quantities. They show no difference in AΓ between the two final states and no indication of CP violation.
Item Description:Im Titel sind die Zahl "0" und das Zeichen "-" und "+" hochgestellt
LHCb Collaboration: R. Aaij, S. Bachmann, A. Bien, M. Britsch, M. De Cian, A. Di Canto, F. Dordei, C. Färber, E. Gersabeck, L. Grillo, S. Hansmann-Menzemer, A. Jaeger, K. Kreplin, G. Krocker, B. Leverington, C. Linn, J. Marks, M. Meissner, T. Nikodem, P. Seyfert, S. Stahl, J. van Tilburg, U. Uwer, M. Vesterinen, S. Wandernoth, D. Wiedner, A. Zhelezov [und weitere]
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Physical Description:Online Resource
ISSN:1079-7114
DOI:10.1103/PhysRevLett.112.041801

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