Observation of Bs0->J/ψf'2(1525) in J/ψK+K- final states
LHCb Collaboration (Including: Back, J. J., Dossett, D., Gershon, T. J., Harrison, P. F., Kreps, Michal, Latham, Thomas, Pilar, T., Poluektov, Anton, Reid, Matthew M., Silva Coutinho, R., Whitehead, M. (Mark) and Williams, M. P.). (2012) Observation of Bs0->J/ψf'2(1525) in J/ψK+K- final states. Physical Review Letters, Vol.108 (No.15). Article Number 151801. ISSN 0031-9007
WRAP_Back_Observation_of_B.pdf - Published Version
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.108.151801
The decay Bs0→J/ψK+K- is investigated using 0.16 fb-1 of data collected with the LHCb detector using 7 TeV pp collisions. Although the J/ψϕ 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 f2′(1525) region as well as a nonresonant component. After subtracting the nonresonant component, we find B(Bs0→J/ψf2′(1525))/B(Bs0→J/ψϕ)=(26.4±2.7±2.4)%.
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