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Observation of the decay B0s→[phi]π+π− and evidence for B0→[phi]π+π−

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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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Main Authors: Aaij, Roel (Author) , D'Argent, Philippe (Author) , Bachmann, Sebastian (Author) , Braun, Svende (Author) , Comerma-Montells, Albert (Author) , De Cian, Michel (Author) , Esen, Sevda (Author) , Gerick, David (Author) , Gersabeck, Evelina (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Kecke, Matthieu (Author) , Khanji, Basem (Author) , Kolpin, Michael (Author) , Leverington, Blake (Author) , Marks, Jörg (Author) , Mitzel, Dominik (Author) , Neubert, Sebastian (Author) , Neuner, Max (Author) , Piucci, Alessio (Author) , Stahl, Marian (Author) , Stemmle, Simon (Author) , Uwer, Ulrich (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 10 January 2017
In: Physical review
Year: 2017, Volume: 95, Issue: 1
ISSN:2470-0029
DOI:10.1103/PhysRevD.95.012006
Online Access: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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Author Notes:R. Aaij et al.* (LHCb Collaboration)
Description
Summary: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.
Item Description: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]
Im Titel wird "phi" als griechischer Buchstabe dargestellt
Im Titel sind die Zeichen "+", "-" und "0" hochgestellt
Im Titel sind "0" und "s" untereinander geschrieben: "0" hochgestellt, "s" tiefgestellt
Gesehen am 30.10.2018
Physical Description:Online Resource
ISSN:2470-0029
DOI:10.1103/PhysRevD.95.012006

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