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Observation of the decay B̄0s→[chi]c2K+K− in the [phi] mass region

The B¯¯¯¯0s→χc2K+K−B¯s0→χc2K+K− {\overline{B}}_s^0\to {\chi}_{c2}{K}^{+}{K}^{-} decay mode is observed and its branching fraction relative to the corresponding χc1 decay mode, in a ±15 MeV/c2 window around the ϕ mass, is found to be B(B¯¯¯¯0s→χc2K+K−)B(B¯¯¯¯0s→χc1K+K−)=(17.1±3.1±0.4±0.9)%,B(B¯s0→χc2...

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Main Authors: Aaij, Roel (Author) , D'Argent, Philippe (Author) , Bachmann, Sebastian (Author) , Berninghoff, Daniel (Author) , Braun, Svende (Author) , De Cian, Michel (Author) , Comerma-Montells, Albert (Author) , Dordei, Francesca (Author) , Dziewiecki, Michal (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) , Piucci, Alessio (Author) , Stahl, Marian (Author) , Stemmle, Simon (Author) , Tilburg, Jeroen van (Author) , Uwer, Ulrich (Author) , Zhelezov, Alexey (Author) , Skidmore, Nicola (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: August 29, 2018
In: Journal of high energy physics
Year: 2018, Issue: 8
ISSN:1029-8479
DOI:10.1007/JHEP08(2018)191
Online Access:Verlag, Volltext: https://doi.org/10.1007/JHEP08(2018)191
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Author Notes:the LHCb collaboration
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Summary:The B¯¯¯¯0s→χc2K+K−B¯s0→χc2K+K− {\overline{B}}_s^0\to {\chi}_{c2}{K}^{+}{K}^{-} decay mode is observed and its branching fraction relative to the corresponding χc1 decay mode, in a ±15 MeV/c2 window around the ϕ mass, is found to be B(B¯¯¯¯0s→χc2K+K−)B(B¯¯¯¯0s→χc1K+K−)=(17.1±3.1±0.4±0.9)%,B(B¯s0→χc2K+K−)B(B¯s0→χc1K+K−)=(17.1±3.1±0.4±0.9)%, \frac{\mathrm{\mathcal{B}}\left({\overline{B}}_s^0\to {\chi}_{c2}{K}^{+}{K}^{-}\right)}{\mathrm{\mathcal{B}}\left({\overline{B}}_s^0\to {\chi}_{c1}{K}^{+}{K}^{-}\right)}=\left(17.1 \pm 3.1\pm 0.4\pm 0.9\right)\%, where the first uncertainty is statistical, the second systematic and the third due to the knowledge of the branching fractions of radiative χc decays. The decay mode B¯¯¯¯0s→χc1K+K−B¯s0→χc1K+K− {\overline{B}}_s^0\to {\chi}_{c1}{K}^{+}{K}^{-} allows the B s 0 mass to be measured as m(B0s)=5366.83±0.25±0.27 MeV/c2,m(Bs0)=5366.83±0.25±0.27 MeV/c2, m\left({B}_s^0\right)=5366.83\pm 0.25\pm 0.27\ \mathrm{M}\mathrm{e}\mathrm{V}/{c}^2, where the first uncertainty is statistical and the second systematic. A combination of this result with other LHCb determinations of the B s 0 mass is made. Open image in new window
Item Description:Im Titel sind "chi" und "phi" als griechische Buchstaben dargestellt
Im Titel ist "c2" tiefgestellt, die Zeichen "+" und "-" hochgestellt
Im Titel sind "0" und "S" untereinander geschrieben: "0" hochgestellt, "S" tiefgestellt
The LHCb collaboration: R. Aaij, P. d'Argent, S. Bachmann, D. Berninghoff, S. Braun, A. Comerma-Montells, M. De Cian, F. Dordei, M. Dziewiecki, D. Gerick, J.P. Grabowski, X. Han, S. Hansmann-Menzemer, M. Kecke, B. Khanji, M. Kolpin, 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 [und weitere]
Gesehen am 15.04.2019
Physical Description:Online Resource
ISSN:1029-8479
DOI:10.1007/JHEP08(2018)191

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