The decay B̅ s0→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(B̅ s0→J/ψf2′(1525))/B(B̅ s0→J/ψϕ)=(26.4±2.7±2.4)%.
Observation of B[over ¯]_{s}^{0}→J/ψf_{2}^{′}(1525) in J/ψK^{+}K^{-} Final States
CARDINALE, ROBERTA;FONTANELLI, FLAVIO;PATRIGNANI, CLAUDIA;PETROLINI, ALESSANDRO;SANNINO, MARIO;
2012-01-01
Abstract
The decay B̅ s0→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(B̅ s0→J/ψf2′(1525))/B(B̅ s0→J/ψϕ)=(26.4±2.7±2.4)%.
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