Observation of the decay B0s→[phi]π+π− and evidence for B0→[phi]π+π−
The first observation of the rare decay B0s→ϕπ+π− and evidence for B0→ϕπ+π− are reported, using pp collision data recorded by the LHCb detector at center-of-mass energies √s=7 and 8 TeV, corresponding to an integrated luminosity of 3 fb−1. The branching fractions in the π+π− invariant mass range 400...
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
10 January 2017
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| In: |
Physical review
Year: 2017, Jahrgang: 95, Heft: 1 |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.95.012006 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevD.95.012006 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.95.012006 
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| Verfasserangaben: | R. Aaij et al.* (LHCb Collaboration) |
MARC
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| 245 | 1 | 0 | |a Observation of the decay B0s→[phi]π+π− and evidence for B0→[phi]π+π− |c R. Aaij et al.* (LHCb Collaboration) |
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| 246 | 3 | 3 | |a Observation of the decay B 0 s → phi pi + pi − and evidence for B 0 → phi pi + pi − |
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| 500 | |a R. Aaij, P. d’Argent, S. Bachmann, S. Braun, A. Comerma-Montells, M. De Cian, S. Esen, D.Gerick, E. Gersabeck, X.Han, S. Hansmann-Menzemer, M. Kecke, B. Khanji, M. Kolpin, B. Leverington, J. Marks, D.S. Mitzel, S. Neubert, M. Neuner, A. Piucci, M. Stahl, S. Stemmle, U. Uwer, A. Zhelezov [und weitere] | ||
| 500 | |a Im Titel wird "phi" als griechischer Buchstabe dargestellt | ||
| 500 | |a Im Titel sind die Zeichen "+", "-" und "0" hochgestellt | ||
| 500 | |a Im Titel sind "0" und "s" untereinander geschrieben: "0" hochgestellt, "s" tiefgestellt | ||
| 500 | |a Gesehen am 30.10.2018 | ||
| 520 | |a The first observation of the rare decay B0s→ϕπ+π− and evidence for B0→ϕπ+π− are reported, using pp collision data recorded by the LHCb detector at center-of-mass energies √s=7 and 8 TeV, corresponding to an integrated luminosity of 3 fb−1. The branching fractions in the π+π− invariant mass range 400<m(π+π−)<1600 MeV/c2 are [3.48±0.23±0.17±0.35]×10−6 and [1.82±0.25±0.41±0.14]×10−7 for B0s→ϕπ+π− and B0→ϕπ+π− respectively, where the uncertainties are statistical, systematic and from the normalization mode B0s→ϕϕ. A combined analysis of the π+π− mass spectrum and the decay angles of the final-state particles identifies the exclusive decays B0s→ϕf0(980), B0s→ϕf2(1270), and B0s→ϕρ0 with branching fractions of [1.12±0.16+0.09−0.08±0.11]×10−6, [0.61±0.13+0.12−0.05±0.06]×10−6 and [2.7±0.7±0.2±0.2]×10−7, respectively. | ||
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