First measurement of the CP-violating phase in B0s→J/ψ(→e+e−)ϕ decays
A flavour-tagged time-dependent angular analysis of $${{B} ^0_{s}} \!\rightarrow {{J /\psi }} \phi $$decays is presented where the $${J /\psi }$$meson is reconstructed through its decay to an
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
24 November 2021
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| In: |
The European physical journal. C, Particles and fields
Year: 2021, Jahrgang: 81, Heft: 11, Pages: 1-18 |
| ISSN: | 1434-6052 |
| DOI: | 10.1140/epjc/s10052-021-09711-7 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epjc/s10052-021-09711-7
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| Verfasserangaben: | LHCb Collaboration: R. Aaij, F. Archilli, S. Bachmann, D. Berninghoff, M. Borsato, M. Dziewiecki, G. Frau, D. Gerick, J.P. Grabowski, P.A. Günther, X. Han, S. Hansmann-Menzemer, J. Hu, R. Kopecná, B. Leverington, P. Li, H. Malygina, J. Marks, A. Piucci, S. Stemmle, D.J. Unverzagt, U. Uwer, C. Wang, L. Witola, A. Zhelezov [und viele weitere] |
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| 245 | 1 | 0 | |a First measurement of the CP-violating phase in B0s→J/ψ(→e+e−)ϕ decays |c LHCb Collaboration: R. Aaij, F. Archilli, S. Bachmann, D. Berninghoff, M. Borsato, M. Dziewiecki, G. Frau, D. Gerick, J.P. Grabowski, P.A. Günther, X. Han, S. Hansmann-Menzemer, J. Hu, R. Kopecná, B. Leverington, P. Li, H. Malygina, J. Marks, A. Piucci, S. Stemmle, D.J. Unverzagt, U. Uwer, C. Wang, L. Witola, A. Zhelezov [und viele weitere] |
| 246 | 3 | 3 | |a First measurement of the CP-violating phase in B zero s→J/psi(→e plus e minus) phi decays |
| 246 | 3 | 3 | |a First measurement of the CP-violating phase in B 0 s→J/psi(→e+e−) phi decays |
| 264 | 1 | |c 24 November 2021 | |
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| 500 | |a Gesehen am 10.02.2022 | ||
| 500 | |a Im Titel sind "0" und "+" und "-" hochgestellt, "s" tiefgestellt | ||
| 520 | |a A flavour-tagged time-dependent angular analysis of $${{B} ^0_{s}} \!\rightarrow {{J /\psi }} \phi $$decays is presented where the $${J /\psi }$$meson is reconstructed through its decay to an |e ^+e ^-$$pair. The analysis uses a sample of pp collision data recorded with the LHCb experiment at centre-of-mass energies of 7 and $$8\text {\,Te V} $$, corresponding to an integrated luminosity of |3 \text {\,fb} ^{-1} $$. The $$C\!P$$-violating phase and lifetime parameters of the $${B} ^0_{s} $$system are measured to be $${\phi _{{s}}} =0.00\pm 0.28\pm 0.07\text {\,rad}$$, $${\Delta \Gamma _{{s}}} =0.115\pm 0.045\pm 0.011\text {\,ps} ^{-1} $$and $${\Gamma _{{s}}} =0.608\pm 0.018\pm 0.012\text {\,ps} ^{-1} $$where the first uncertainty is statistical and the second systematic. This is the first time that $$C\!P$$-violating parameters are measured in the $${{B} ^0_{s}} \!\rightarrow {{J /\psi }} \phi $$decay with an |e ^+e ^-$$pair in the final state. The results are consistent with previous measurements in other channels and with the Standard Model predictions. | ||
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