Branching fraction measurements of the color-suppressed decays B[over-bar] 0 to D[superscript (*)0π0, D[superscript (*)0]η, D[superscript (*)0]ω, and D[superscript(*)0]η′ and measurement of the polarization in the decay B[over-bar] 0-->D[superscript *0]ω
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Lees-2011-Branching fraction measurements of the color-suppressed.pdf
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Author(s)
Dujmic, Denis
Sciolla, Gabriella
Cowan, Ray F
Alternative Title
Branching fraction measurements of the color-suppressed decays B̅ 0 to D(*)0π0, D(*)0η, D(*)0ω, and D(*)0η′ and measurement of the polarization in the decay B̅ 0→D*0ω
Date Issued
December 2011
Journal
Physical Review D
Publisher
American Physical Society
Citation
Lees, J. et al. “Branching Fraction Measurements of the Color-suppressed Decays B[over ¯]^{0} to D^{(*)0}π^{0}, D^{(*)0}η, D^{(*)0}ω, and D^{(*)0}η^{′} and Measurement of the Polarization in the Decay B[over ¯]^{0}→D^{*0}ω.” Physical Review D 84.11 (2011): [25 pages]. Web.
Version
Final published version
Abstract
We report updated branching fraction measurements of the color-suppressed decays B̅ 0-->D0π0, D*0π0, D0η, D*0η, D0ω, D*0ω, D0η′, and D*0η′. We measure the branching fractions (×10-4): B(B̅ 0→D0π0)=2.69±0.09±0.13, B(B̅ 0-->D*0π0)=3.05±0.14±0.28, B(B̅ 0→D0η)=2.53±0.09±0.11, B(B̅ 0→D*0η)=2.69±0.14±0.23, B(B̅ 0-->D0ω)=2.57±0.11±0.14, B(B̅ 0-->D*0ω)=4.55±0.24±0.39, B(B̅ 0-->D0η′)=1.48±0.13±0.07, and B(B̅ 0-->D*0η′)=1.49±0.22±0.15. We also present the first measurement of the longitudinal polarization fraction of the decay channel D*0ω, fL=(66.5±4.7±1.5)%. In the above, the first uncertainty is statistical and the second is systematic. The results are based on a sample of (454±5)×106 BB̅ pairs collected at the Υ(4S) resonance, with the BABAR detector at the PEP-II storage rings at SLAC. The measurements are the most precise determinations of these quantities from a single experiment. They are compared to theoretical predictions obtained by factorization, Soft Collinear Effective Theory (SCET) and perturbative QCD (pQCD). We find that the presence of final state interactions is favored and the measurements are in better agreement with SCET than with pQCD.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.84.112007
