Observation ofB¯s0→J/ψf2′(1525)inJ/ψK+K−Final States

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doi:10.1103/physrevlett.108.151801

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)%.

Highlights

of data collected with the LHCb detector using
In the KþKÀ mass spectrum we observe a significant signal in the f20 ð1525Þ region
when the KþKÀ are consistent with the decay of the other resonant