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: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
August 29, 2018
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| 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 |
MARC
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| 245 | 1 | 0 | |a Observation of the decay B̄0s→[chi]c2K+K− in the [phi] mass region |c the LHCb collaboration |
| 246 | 3 | 0 | |a χ, ϕ |
| 246 | 3 | 3 | |a Observation of the decay B̄ 0 s → chi c2 K plus K minus in the phi mass region |
| 264 | 1 | |c August 29, 2018 | |
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| 500 | |a Im Titel sind "chi" und "phi" als griechische Buchstaben dargestellt | ||
| 500 | |a Im Titel ist "c2" tiefgestellt, die Zeichen "+" und "-" hochgestellt | ||
| 500 | |a Im Titel sind "0" und "S" untereinander geschrieben: "0" hochgestellt, "S" tiefgestellt | ||
| 500 | |a 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] | ||
| 500 | |a Gesehen am 15.04.2019 | ||
| 520 | |a 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 | ||
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