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Measurement of CP violation in B0s → [phi phi] decays

A measurement of the decay time-dependent CP-violating asymmetry in B0s→ϕϕ decays is presented, along with measurements of the T-odd triple-product asymmetries. In this decay channel, the CP-violating weak phase arises from the interference between B0s−¯B0s mixing and the loop-induced decay amplitud...

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Main Authors: Aaij, Roel (Author) , Bachmann, Sebastian (Author) , Bien, Alexander (Author) , Comerma-Montells, Albert (Author) , De Cian, Michel (Author) , Dordei, Francesca (Author) , Esen, Sevda (Author) , Färber, Christian (Author) , Gersabeck, Evelina (Author) , Grillo, Lucia (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Jäger, Andreas (Author) , Kolpin, Michael (Author) , Kreplin, Katharina (Author) , Krocker, Georg Alexander (Author) , Leverington, Blake (Author) , Marks, Jörg (Author) , Meißner, Marco (Author) , Neuner, Max (Author) , Nikodem, Thomas (Author) , Seyfert, Paul (Author) , Stahl, Marian (Author) , Stahl, Sascha (Author) , Uwer, Ulrich (Author) , Vesterinen, Mika (Author) , Wandernoth, Sebastian (Author) , Wiedner, Dirk (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 30 September 2014
In: Physical review. D, Particles, fields, gravitation, and cosmology
Year: 2014, Volume: 90, Issue: 5
ISSN:1550-2368
DOI:10.1103/PhysRevD.90.052011
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevD.90.052011
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.90.052011
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Author Notes:R. Aaij et al. (LHCb Collaboration)
Description
Summary:A measurement of the decay time-dependent CP-violating asymmetry in B0s→ϕϕ decays is presented, along with measurements of the T-odd triple-product asymmetries. In this decay channel, the CP-violating weak phase arises from the interference between B0s−¯B0s mixing and the loop-induced decay amplitude. Using a sample of proton-proton collision data corresponding to an integrated luminosity of 3.0 fb−1 collected with the LHCb detector, a signal yield of approximately 4000 B0s→ϕϕ decays is obtained. The CP-violating phase is measured to be ϕs=−0.17±0.15(stat)±0.03(syst) rad. The triple-product asymmetries are measured to be AU=−0.003±0.017(stat)±0.006(syst) and AV=−0.017±0.017(stat)±0.006(syst). Results are consistent with the hypothesis of CP conservation.
Item Description:LHCb Collaboration: R. Aaij, S. Bachmann, A. Bien, A. Comerma-Montells, M. De Cian, F. Dordei, S. Esen, C. Färber, E. Gersabeck, L. Grillo, X. Han, S. Hansmann-Menzemer, A. Jaeger, M. Kolpin, K. Kreplin, G. Krocker, B. Leverington, J. Marks, M. Meissner, M. Neuner, T. Nikodem, P. Seyfert, M. Stahl, S. Stahl, U. Uwer, M. Vesterinen, S. Wandernoth, D. Wiedner, A. Zhelezov und 672 weitere
Im Titel ist "0" hochgestellt, "s" tiefgestellt, [phi phi] ist in griechischen Buchstaben dargestellt
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Physical Description:Online Resource
ISSN:1550-2368
DOI:10.1103/PhysRevD.90.052011

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