Evidence for the Decay B[superscript 0] → ωω and Search for B[superscript 0] → ωϕ
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Lees-2014-Evidence for the decay.pdf
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Author(s)
Dujmic, Denis
Sciolla, Gabriella
Cowan, Ray F
Date Issued
March 2014
Journal
Physical Review D
Publisher
American Physical Society
Citation
Lees, J. P., V. Poireau, V. Tisserand, E. Grauges, A. Palano, G. Eigen, B. Stugu, et al. “Evidence for the Decay B[superscript 0] → ωω and Search for B[superscript 0] → ωϕ.” Phys. Rev. D 89, no. 5 (March 2014). © 2014 American Physical Society
Version
Final published version
Abstract
We describe searches for B meson decays to the charmless vector-vector final states ωω and ωϕ with 471 × 10[superscript 6]B[bar over B] pairs produced in e[superscript +]e[superscript −] annihilation at √s = 10.58 GeV using the BABAR detector at the PEP-II collider at the SLAC National Accelerator Laboratory. We measure the branching fraction B(B[superscript 0] → ωω) = (1.2 ± 0.3[+0.3 over −0.2]) × 10[superscript −6], where the first uncertainty is statistical and the second is systematic, corresponding to a significance of 4.4 standard deviations. We also determine the upper limit B(B[superscript 0] → ωϕ) < 0.7 × 10[superscript −6] at 90% confidence level. These measurements provide the first evidence for the decay B[superscript 0] → ωω, and an improvement of the upper limit for the decay B[superscript 0] → ωϕ.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.89.051101
