Observation of B̅ s0→J/ψf2′(1525) in J/ψK+K- Final States

The LHCb Collaboration

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Abstract / Description of output

In this Letter the decay Bs -> J/\psi K+ K- is investigated. Although the J/\psi \phi\ channel is well known, final states at higher K+K- masses have not previously been studied. In the K+K- mass spectrum we observe a significant signal in the f'2(1525) region as well as a non-resonant component. The ratio of the rate in a K+K- mass window of +/- 125 MeV around the f'2 relative to that in the J/\psi \phi\ decay, where \phi -> K+K-, is R=(19.4 +/- 1.8 +/- 1.0)%. Our sample consists of 0.16/fb collected with the LHCb detector using 7 TeV pp collisions.
Original languageEnglish
Pages (from-to)497-505
Number of pages9
JournalPhysical Review Letters
Issue number15
Early online date20 Dec 2011
Publication statusPublished - 9 Apr 2012


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