Observation of B0(s)→J=[psi]pp̄ decays and precision measurements of the B0(s) masses
The first observation of the decays B0(s)→J/ψp¯p is reported, using proton-proton collision data corresponding to an integrated luminosity of 5.2 fb−1, collected with the LHCb detector. These decays are suppressed due to limited available phase space, as well as due to Okubo-Zweig-Iizuka or Cabibbo...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
17 May 2019
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| In: |
Physical review letters
Year: 2019, Jahrgang: 122, Heft: 19, Pages: 191804 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.122.191804 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevLett.122.191804 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.122.191804 |
| Verfasserangaben: | R. Aaij et al.*(LHCb Collaboration) |
MARC
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| 245 | 1 | 0 | |a Observation of B0(s)→J=[psi]pp̄ decays and precision measurements of the B0(s) masses |c R. Aaij et al.*(LHCb Collaboration) |
| 246 | 3 | 0 | |a ψ |
| 246 | 3 | 3 | |a Observation of the decay B 0 (s) → J=psi pp̄ decays and precision measurements of the B 0 (s) masses |
| 264 | 1 | |c 17 May 2019 | |
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| 500 | |a Im Titel ist "psi" als griechischer Buchstaben dargestellt | ||
| 500 | |a Im Titel sind "0" und "s" untereinander geschrieben: "0" hochgestellt, "s" tiefgestellt | ||
| 500 | |a LHCb Collaboration: R. Aaij, P. D'Argent, S. Bachmann, D. Berninghoff, S. Braun, A. Comerma-Montells, M. Dziewiecki, D. Gerick, J. Grabowski, X. Han, S. Hansmann-Menzemer, J. Hu, M. Kecke, M. Kolpin, R. Kopecná, B. Leverington, H. Malygina, J. Marks, D. Mitzel, S. Neubert, A. Piucci, M. Schmelling, N. Skidmore, M. Stahl, S. Stemmle, U. Uwer, A. Zhelezov [und 818 weitere] | ||
| 500 | |a Gesehen am 26.05.2020 | ||
| 520 | |a The first observation of the decays B0(s)→J/ψp¯p is reported, using proton-proton collision data corresponding to an integrated luminosity of 5.2 fb−1, collected with the LHCb detector. These decays are suppressed due to limited available phase space, as well as due to Okubo-Zweig-Iizuka or Cabibbo suppression. The measured branching fractions are B(B0→J/ψp¯p)=[4.51±0.40(stat)±0.44(syst)]×10−7, B(B0s→J/ψp¯p)=[3.58±0.19(stat)±0.39(syst)]×10−6. For the B0s meson, the result is much higher than the expected value of O(10−9). The small available phase space in these decays also allows for the most precise single measurement of both the B0 mass as 5279.74±0.30(stat)±0.10(syst) MeV and the B0s mass as 5366.85±0.19(stat)±0.13(syst) MeV. | ||
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| SRT | |a LHCBCOLLABOBSERVATIO1720 | ||