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Observation of Bs -> J/\psi f'2(1525) in J/\psi K+K- final states

Abstract : The decay Bs -> J/\psi K+ K- is investigated using 0.16/fb of data collected with the LHCb detector using 7 TeV pp collisions. 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. After subtracting the non-resonant component, we find B(Bs->J/\psi f'_2(1525))/B(Bs->J/\psi \phi)=(26.4 +/- 2.7 +/- 2.4)%.
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http://hal.in2p3.fr/in2p3-00687939
Contributor : Sabine Starita <>
Submitted on : Monday, April 16, 2012 - 10:22:55 AM
Last modification on : Wednesday, September 16, 2020 - 4:25:54 PM

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R. Aaij, S. Barsuk, O. Callot, J. He, B. Jean-Marie, et al.. Observation of Bs -> J/\psi f'2(1525) in J/\psi K+K- final states. Physical Review Letters, American Physical Society, 2012, 108, pp.151801. ⟨10.1103/PhysRevLett.108.151801⟩. ⟨in2p3-00687939⟩

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