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First observation of Bs0→J/ψf0(980) decays

Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the hadronic decay Bs0→J/ψf0(980) is observed. This CP eigenstate mode could be used to measure mixing-induced CP violation in the Bs0 system. Using a fit to the π+π− mass spectrum with inter...

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Main Authors: Aaij, Roel (Author) , Bachmann, Sebastian (Author) , Deissenroth, Marc (Author) , Eisele, Franz (Author) , Färber, Christian (Author) , Hansmann-Menzemer, Stephanie (Author) , Holubyev, Kostya (Author) , Krocker, Georg Alexander (Author) , Linn, Christian (Author) , Marks, Jörg (Author) , Meißner, Marco (Author) , Uwer, Ulrich (Author) , Wandernoth, Sebastian (Author) , Wiedner, Dirk (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 5 March 2011
In: Physics letters
Year: 2011, Volume: 698, Issue: 2, Pages: 115-122
ISSN:1873-2445
DOI:10.1016/j.physletb.2011.03.006
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.physletb.2011.03.006
Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0370269311002395
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Author Notes:LHCb Collaboration*
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Summary:Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the hadronic decay Bs0→J/ψf0(980) is observed. This CP eigenstate mode could be used to measure mixing-induced CP violation in the Bs0 system. Using a fit to the π+π− mass spectrum with interfering resonances gives Rf0/ϕ≡Γ(Bs0→J/ψf0,f0→π+π−)Γ(Bs0→J/ψϕ,ϕ→K+K−)=0.252−0.032−0.033+0.046+0.027. In the interval ±90 MeV around 980 MeV, corresponding to approximately two full f0 widths we also find R′≡Γ(Bs0→J/ψπ+π−,|m(π+π−)−980 MeV|<90 MeV)Γ(Bs0→J/ψϕ,ϕ→K+K−)=0.162±0.022±0.016, where in both cases the uncertainties are statistical and systematic, respectively.
Item Description:*LHCb Collaboration: R. Aaij, S. Bachmann, M. Deissenroth, F. Eisele, C. Färber, S. Hansmann-Menzemer, K. Holubyev, G. Krocker, C. Linn, J. Marks, M. Meissner, U. Uwer, S. Wandernoth, D. Wiedner, A. Zhelezov [und 532 weitere Personen]
Im Titel ist der Buchstabe s tiefgestellt
Im Titel ist die Zahl 0 im Ausdruck "Bs0" hochgestellt sowie im Ausdruck "J/ψf0(980)" tiefgestellt
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Physical Description:Online Resource
ISSN:1873-2445
DOI:10.1016/j.physletb.2011.03.006

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