Observation of Bs0->J/ψf'2(1525) in J/ψK+K- final states
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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