Measurement of branching fractions of color-suppressed decays of the B0 meson to D(*)0π0, D(*)0η, D(*)0ω, and D0η'
Abstract
Using a sample of 88.8×106 BB¯ events collected with the BABAR detector at the PEP-II storage rings at the Stanford Linear Accelerator Center, we measure the branching fractions of seven color-suppressed B-meson decays: B(B0→D0π0)=[2.9±0.2(stat)±0.3(syst)]×10-4, B(B0→D*0π0)=[2.9±0.4(stat)±0.5(syst)]×10-4, B(B0→D0η)=[2.5±0.2(stat)±0.3(syst)]×10-4, B(B0→D*0η)=[2.6±0.4(stat)±0.4(syst)]×10-4, B(B0→D0ω)=[3.0±0.3(stat)±0.4(syst)]×10-4, B(B0→D*0ω)=[4.2±0.7(stat)±0.9(syst)]×10-4, and B(B0→D0η')=[1.7±0.4(stat)±0.2(syst)]×10-4. We set the 90% confidence-level upper limit: B(B0→D*0η')<2.6×10-4. The channels B0→D*0η, D*0ω, and D0η' are seen with more than five-sigma statistical significance. All of these branching fractions are significantly larger than theoretical expectations based on the “naive” factorization model.
- Publication:
-
Physical Review D
- Pub Date:
- February 2004
- DOI:
- 10.1103/PhysRevD.69.032004
- arXiv:
- arXiv:hep-ex/0310028
- Bibcode:
- 2004PhRvD..69c2004A
- Keywords:
-
- 13.25.Hw;
- 11.30.Er;
- 12.15.Hh;
- Decays of bottom mesons;
- Charge conjugation parity time reversal and other discrete symmetries;
- Determination of Kobayashi-Maskawa matrix elements;
- High Energy Physics - Experiment
- E-Print:
- 25 pages, 28 postscript (eps) figures, submitted to Phys. Rev. D