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First observation of B+→D+sK+K− decays and a search for B+ → D+s[phi] decays

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A search for B+ → D s + K+K− decays is performed using pp collision data corresponding to an integrated luminosity of 4.8 fb−1, collected at centre-of-mass energies of 7, 8 and 13 TeV with the LHCb experiment. A significant signal is observed for the first time and the branching fraction is determin...

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Main Authors: Aaij, Roel (Author) , D'Argent, Philippe (Author) , Bachmann, Sebastian (Author) , Berninghoff, Daniel (Author) , Braun, Svende (Author) , Comerma-Montells, Albert (Author) , De Cian, Michel (Author) , Dziewiecki, Michal (Author) , Esen, Sevda (Author) , Gerick, David (Author) , Grabowski, Jascha (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Kecke, Matthieu (Author) , Khanji, Basem (Author) , Kolpin, Michael (Author) , Kopecná, Renata (Author) , Leverington, Blake (Author) , Marks, Jörg (Author) , Mitzel, Dominik (Author) , Neubert, Sebastian (Author) , Neuner, Max (Author) , Nikodem, Thomas (Author) , Piucci, Alessio (Author) , Stahl, Marian (Author) , Stemmle, Simon (Author) , Uwer, Ulrich (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: January 26, 2018
In: Journal of high energy physics
Year: 2018, Issue: 1
ISSN:1029-8479
DOI:10.1007/JHEP01(2018)131
Online Access:Verlag, Volltext: https://doi.org/10.1007/JHEP01(2018)131
Verlag, Volltext: https://link.springer.com/article/10.1007%2FJHEP01%282018%29131
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Author Notes:the LHCb collaboration
Description
Summary:A search for B+ → D s + K+K− decays is performed using pp collision data corresponding to an integrated luminosity of 4.8 fb−1, collected at centre-of-mass energies of 7, 8 and 13 TeV with the LHCb experiment. A significant signal is observed for the first time and the branching fraction is determined to be B(B+→D+sK+K−)=(7.1±0.5±0.6±0.7)×10−6,B(B+→Ds+K+K−)=(7.1±0.5±0.6±0.7)×10−6, \mathrm{\mathcal{B}}\left({B}^{+}\to {D}_s^{+}{K}^{+}{K}^{-}\right)=\left(7.1 \pm 0.5 \pm 0.6 \pm 0.7\right)\times 1{0}^{-6}, where the first uncertainty is statistical, the second systematic and the third due to the uncertainty on the branching fraction of the normalisation mode B+→D+sD¯¯¯¯0B+→Ds+D¯0 {B}^{+}\to {D}_s^{+}{\overline{D}}^0 . A search is also performed for the pure annihilation decay B+ → D s + ϕ. No significant signal is observed and a limit of B(B+→D+sϕ)<4.9×10−7(4.2×10−7)B(B+→Ds+ϕ)<4.9×10−7(4.2×10−7) \mathrm{\mathcal{B}}\left({B}^{+}\to {D}_s^{+}\phi \right)<4.9 \times 1{0}^{-7}\left(4.2 \times 1{0}^{-7}\right) is set on the branching fraction at 95% (90%) confidence level. Open image in new window
Item Description:Im Titel ist "phi" als griechischer Buchstabe dargestellt
Im Titel sind "+" und "s" untereinander geschrieben: "+" hochgestellt, "s" tiefgestellt
Im Titel sind "+" und "-" hochgestellt
The LHCb collaboration: R. Aaij, P. d'Argent, S. Bachmann, D.Berninghoff, S. Braun, A. Comerma-Montells, M. De Cian, M. Dziewieck, S. Esen, D. Gerick, J.P Grabowski, X. Han, S. Hansmann-Menzemer, M. Kecke, B. Khanji, M. Kolpin, R. Kopecná, B. Leverington, J. Marks, D.S. Mitzel, S. Neubert, M. Neuner, T. Nikodem, A. Piucci, M. Stahl, S. Stemmle, U. Uwer, A. Zhelezov [und weitere]
Gesehen am 02.05.2019
Physical Description:Online Resource
ISSN:1029-8479
DOI:10.1007/JHEP01(2018)131

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