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Amplitude analysis and branching fraction measurement of B[overbar] s[superscript 0]-->J/ψK[superscript +]K[superscript -]

Author(s)
Williams, M.
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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.

Alternative title
Amplitude analysis and branching fraction measurement of B̅ s0→J/ψK+K-
Terms of use
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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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.
Date issued
2013-04
URI
http://hdl.handle.net/1721.1/82130
Department
Massachusetts Institute of Technology. Department of Physics
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
ISSN
1550-7998
1550-2368

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