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
Author(s)
Dujmic, Denis; Sciolla, Gabriella; Cowan, Ray F
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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
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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.
Date issued
2011-12Department
Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
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
ISSN
1550-7998
1550-2368