First observation of B[bar]0 → J/ψK+K− and search for B[bar]0 → J/ψϕ decays
The first observation of the B̄0→J/ψK+K− decay is presented with a data sample corresponding to an integrated luminosity of 1.0 fb−1 of pp collisions at a center-of-mass energy of 7 TeV collected with the LHCb detector. The branching fraction is measured to be B(B̄0→J/ψK+K−)=(2.53±0.31±0.19)×10−6, w...
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| Körperschaft: | |
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
14 October 2013
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| In: |
Physical review. D, Particles, fields, gravitation, and cosmology
Year: 2013, Jahrgang: 88, Heft: 7, Pages: 1-15 |
| ISSN: | 1550-2368 |
| DOI: | 10.1103/PhysRevD.88.072005 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevD.88.072005 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.88.072005 
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| Verfasserangaben: | R. Aaij et al. (LHCb Collaboration) |
MARC
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| 245 | 1 | 0 | |a First observation of B[bar]0 → J/ψK+K− and search for B[bar]0 → J/ψϕ decays |c R. Aaij et al. (LHCb Collaboration) |
| 246 | 3 | 0 | |a B̄ |
| 246 | 3 | 3 | |a First observation of B bar zero → J/ psi K plus K minus and search for B bar zero → J/ psi phi decays |
| 246 | 3 | 3 | |a First observation of B̄ zero → J/ psi K+K− and search for B̄ zero → J/ psi phi decays |
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| 500 | |a Im Titel sind "0", "+" und "-" hochgestellt | ||
| 500 | |a LHCb Collaboration: R. Aaij, O. Aquines Gutierrez, S. Bachmann, A. Bien, J. Blouw, M. Britsch, M. De Cian, A. Di Canto, F. Dordei, C. Färber, M. Fontana, E. Gersabeck, O. Grünberg, S. Hansmann-Menzemer, T. Hartmann, M. Heß, A. Jaeger, K. Kreplin, G. Krocker, B. Leverington, C. Linn, J. Marks, M. Meissner, T. Nikodem, D. Popov, M. Schmelling, P. Seyfert, S. Stahl, J. van Tilburg, U. Uwer, D. Volyanskyy, C. Voß, H. Voss, R. Waldi, S. Wandernoth, D. Wiedner, M. Zavertyaev, A. Zhelezov und weitere 617 | ||
| 500 | |a Gesehen am 21.04.2021 | ||
| 520 | |a The first observation of the B̄0→J/ψK+K− decay is presented with a data sample corresponding to an integrated luminosity of 1.0 fb−1 of pp collisions at a center-of-mass energy of 7 TeV collected with the LHCb detector. The branching fraction is measured to be B(B̄0→J/ψK+K−)=(2.53±0.31±0.19)×10−6, where the first uncertainty is statistical and the second is systematic. An amplitude analysis of the final state in the B̄0→J/ψK+K− decay is performed to separate resonant and nonresonant contributions in the K+K− spectrum. Evidence of the a0(980) resonance is reported with statistical significance of 3.9 standard deviations. The corresponding product branching fraction is measured to be B(B̄0→J/ψa0(980),a0(980)→K+K−)=(4.70±3.31±0.72)×10−7, yielding an upper limit of B(¯B̄0→J/ψa0(980),a0(980)→K+K−)<9.0×10−7 at 90% confidence level. No evidence of the resonant decay B̄0→J/ψϕ is found, and an upper limit on its branching fraction is set to be B(B̄0→J/ψϕ)<1.9×10−7 at 90% confidence level. | ||
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