Measurement of the B[superscript 0][subscript s] → ΦΦ Branching Fraction and Search for the Decay B[superscript 0] → ΦΦ
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JHEP10(2015)053.pdf
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Author(s)
Ilten, Philip J
Williams, Michael
Date Issued
October 2015
Journal
Journal of High Energy Physics
Publisher
Springer Nature
Citation
The LHCb collaboration, et al. “Measurement of the B[superscript 0][subscript s] → ΦΦ Branching Fraction and Search for the Decay B[superscript 0] → ΦΦ.” Journal of High Energy Physics, vol. 2015, no. 10, Oct. 2015. © 2015 The Authors
Version
Final published version
Abstract
Using a dataset corresponding to an integrated luminosity of 3.0 fb[superscript −1] collected in pp collisions at centre-of-mass energies of 7 and 8 TeV, the B[superscript 0][subscript s] → ϕϕ branching fraction is measured to be = (1.84 ± 0.05(stat) ± 0.07(syst) ± 0.11 (f[subscript s]/f[subscript d]) ± 0.12 (norm) ) × 10[superscript −5], where f[subscript s]/f[superscript d] represents the ratio of the B[superscript 0][subscript s] to B[superscript 0] production cross-sections, and the B[superscript 0] → ϕK * (892)[superscript 0] decay mode is used for normalization. This is the most precise measurement of this branching fraction to date, representing a factor five reduction in the statistical uncertainty compared with the previous best measurement. A search for the decay B[superscript 0] → ϕϕ is also made. No signal is observed, and an upper limit on the branching fraction is set as
B(B[superscript 0] → φφ) < 2.8 × 10[superscript −8] at 90% confidence level. This is a factor of seven improvement compared to the previous best limit.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1007/JHEP10(2015)053
