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Measurement of the time-integrated CP asymmetry in D0→K0SK0S decays

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A measurement of the time-integrated CP asymmetry in D0 → K S 0 K S 0 decays is reported. The data correspond to an integrated luminosity of about 2 fb−1 collected in 2015-2016 by the LHCb collaboration in pp collisions at a centre-of-mass energy of 13 TeV. The D0 candidate is required to originate...

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Main Authors: Aaij, Roel (Author) , D'Argent, Philippe (Author) , Bachmann, Sebastian (Author) , Braun, Svende (Author) , De Cian, Michel (Author) , Comerma-Montells, Albert (Author) , Esen, Sevda (Author) , Gerick, David (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Kecke, Matthieu (Author) , Khanji, Basem (Author) , Leverington, Blake (Author) , Marks, Jörg (Author) , Mitzel, Dominik (Author) , Neubert, Sebastian (Author) , Neuner, Max (Author) , Piucci, Alessio (Author) , Stahl, Marian (Author) , Stemmle, Simon (Author) , Tilburg, Jeroen van (Author) , Uwer, Ulrich (Author) , Zhelezov, Alexey (Author) , Dziewiecki, Michal (Author) , Grabowski, Jascha (Author) , Kopecná, Renata (Author) , Skidmore, Nicola (Author) , Berninghoff, Daniel (Author) , Grünberg, Oliver (Author) , Heß, Miriam (Author) , Meinert, Nis (Author) , Viemann, Harald (Author) , Waldi, Roland (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: November 8, 2018
In: Journal of high energy physics
Year: 2018, Issue: 11
ISSN:1029-8479
DOI:10.1007/JHEP11(2018)048
Online Access:Verlag, Volltext: https://doi.org/10.1007/JHEP11(2018)048
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Author Notes:the LHCb collaboration
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Summary:A measurement of the time-integrated CP asymmetry in D0 → K S 0 K S 0 decays is reported. The data correspond to an integrated luminosity of about 2 fb−1 collected in 2015-2016 by the LHCb collaboration in pp collisions at a centre-of-mass energy of 13 TeV. The D0 candidate is required to originate from a D*+ → D0π+ decay, allowing the determination of the flavour of the D0 meson using the pion charge. The D0 → K+K− decay, which has a well measured CP asymmetry, is used as a calibration channel. The CP asymmetryfor D0 → K S 0 K S 0 is measured to be ACP(D0→K0SK0S)=(4.3±3.4±1.0)%,ACP(D0→KS0KS0)=(4.3±3.4±1.0)%, {\mathcal{A}}^{CP}\left({D}^0\to {K}_S^0{K}_S^0\right)=\left(4.3\pm 3.4\pm 1.0\right)\%, where the first uncertainty is statistical and the second is systematic. This result is combined with the previous LHCb measurement at lower centre-of-mass energies to obtain ACP(D0→K0SK0S)=(2.3±2.8±0.9)%.ACP(D0→KS0KS0)=(2.3±2.8±0.9)%. {\mathcal{A}}^{CP}\left({D}^0\to {K}_S^0{K}_S^0\right)=\left(2.3\pm 2.8\pm 0.9\right)\%. Open image in new window
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The LHCb collaboration: R. Aaij, P. d'Argent, S. Bachmann, D. Berninghoff, S. Braun, A. Comerma-Montells, M. De Cian, M. Dziewiecki, S. Esen, D. Gerick, J.P. Grabowski, X. Han, S. Hansmann-Menzemer, M. Kecke, B. Khanji, R. Kopecna, B. Leverington, J. Marks, D.S. Mitzel, S. Neubert, M. Neuner, A. Piucci, N. Skidmore, M. Stahl, S. Stemmle, J. van Tilburg, U. Uwer, A. Zhelezov, O. Grünberg, M. Heß, N. Meinert, H. Viemann, R. Waldi [und weitere]
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Physical Description:Online Resource
ISSN:1029-8479
DOI:10.1007/JHEP11(2018)048

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