Measurements of branching fractions and CP asymmetries and studies of angular distributions for B→ϕϕK decays
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Cowan-2011-Measurements of branching fractions and CP.pdf
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Author(s)
Dujmic, Denis
Sciolla, Gabriella
Cowan, Ray F
Date Issued
July 2011
Journal
Physical Review D
Publisher
American Physical Society
Citation
Lees, J. et al. “Measurements of branching fractions and CP asymmetries and studies of angular distributions for B→ϕϕK decays.” Physical Review D 84 (2011): n. pag. Web. 4 Nov. 2011. © 2011 American Physical Society
Version
Final published version
Abstract
We present branching fraction and CP asymmetry measurements as well as angular studies of B→ϕϕK decays using 464×10[superscript 6] BB̅ events collected by the BABAR experiment. The branching fractions are measured in the ϕϕ invariant mass range below the η[subscript c] resonance (m[subscript ϕϕ]<2.85 GeV). We find B(B[superscript +]→ϕϕK[superscript +])=(5.6±0.5±0.3)×10[superscript -6] and B(B[superscript 0]→ϕϕK[superscript 0])=(4.5±0.8±0.3)×10[superscript -6], where the first uncertainty is statistical and the second systematic. The measured direct CP asymmetries for the B[superscript ±] decays are A[subscript CP]=-0.10±0.08±0.02 below the η[subscript c] threshold (m[subscript ϕϕ]<2.85 GeV) and A[subscript CP]=0.09±0.10±0.02 in the η[subscript c] resonance region (m[subscript ϕϕ] in [2.94, 3.02] GeV). Angular distributions are consistent with J[superscript P]=0[superscript ]- in the η[subscript c] resonance region and favor J[superscript P]=0[superscript ]+ below the η[subscript c] resonance.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.84.012001
