Observation of [¯ over B][0 over (s)] → J/ψf[subscript 1](1285) Decays and Measurement of the f[subscript 1](1285) Mixing Angle
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Aaij-2014-Observation of B.pdf
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Author(s)
Williams, Michael
Date Issued
March 2014
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaij, R., B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, et al. “Observation of [¯ over B][0 over (s)] → J/ψf[subscript 1](1285) Decays and Measurement of the f[subscript 1](1285) Mixing Angle.” Physical Review Letters 112, no. 9 (March 2014). © 2014 CERN, for the LHCb Collaboration
Version
Final published version
Abstract
Decays of [¯ over B][0 over s] and [¯ over B][superscript 0] mesons into J/ψ π[superscript +]π[superscript −]π[superscript +]π[superscript −] final states, produced in pp collisions at the LHC, are investigated using data corresponding to an integrated luminosity of 3 fb[superscript −1] collected with the LHCb detector. [¯ over B][0 over (s)] → J/ψf[subscript 1](1285) decays are seen for the first time, and the branching fractions are measured. Using these rates, the f[subscript 1](1285) mixing angle between strange and nonstrange components of its wave function in the q[¯ over q] structure model is determined to be ±(24.0[+3.1+0.6 over −2.6−0.8])°. Implications on the possible tetraquark nature of the f[subscript 1](1285) are discussed.
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/PhysRevLett.112.091802
