Observation of [¯ over B][0 over (s)] → J/ψf[subscript 1](1285) Decays and Measurement of the f[subscript 1](1285) Mixing Angle
Author(s)
Williams, Michael
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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.
Date issued
2014-03Department
Massachusetts Institute of Technology. Department of PhysicsJournal
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
ISSN
0031-9007
1079-7114