Amplitude analysis and branching fraction measurement of B[overbar] s[superscript 0]-->J/ψK[superscript +]K[superscript -]
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Aaij-2013-Amplitude analysis a.pdf
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Author(s)
Williams, M.
Alternative Title
Amplitude analysis and branching fraction measurement of B̅ s0→J/ψK+K-
Date Issued
April 2013
Journal
Physical Review D
Publisher
American Physical Society
Citation
Aaij, R., C. Abellan Beteta, A. Adametz, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, et al. Amplitude Analysis and Branching Fraction Measurement of B[over ¯]_{s}^{0}→J/ψK^{+}K^{-}. Physical Review D 87, no. 7 (April 2013).
Version
Final published version
Abstract
An amplitude analysis of the final state structure in the B̅ s0→J/ψK+K- decay mode is performed using 1.0 fb-1 of data collected by the LHCb experiment in 7 TeV center-of-mass energy pp collisions produced by the LHC. A modified Dalitz plot analysis of the final state is performed using both the invariant mass spectra and the decay angular distributions. Resonant structures are observed in the K+K- mass spectrum as well as a significant nonresonant S-wave contribution over the entire K+K- mass range. The largest resonant component is the ϕ(1020), accompanied by f0(980), f2′(1525), and four additional resonances. The overall branching fraction is measured to be B(B̅ s0→J/ψK+K-)=(7.70±0.08±0.39±0.60)×10-4, where the first uncertainty is statistical, the second systematic, and the third due to the ratio of the number of B̅ s0 to B- mesons produced. The mass and width of the f2′(1525) are measured to be 1522.2±2.8-2.0+5.3 MeV and 84±6-5+10 MeV, respectively. The final state fractions of the other resonant states are also reported.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.87.072004
