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

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

2011-12-20

arxiv.org/abs/1112.4695v3

Physical Review Letters, 108, 151801 (2012)

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 5 figures, v2 many revisions, submitted to PRL

Scientific paper

10.1103/PhysRevLett.108.151801

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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