2003/10/14 by B. Aubert, R. Barate, D. Boutigny +97 · 2 citations
Engineering · Physics and Astronomy · #Particle Accelerators and Free-Electron Lasers #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1103/physrevd.69.032004
published as Phys.Rev.D69:032004,2004 · 25 pages, 28 postscript (eps) figures, submitted to Phys. Rev. D
arxiv created 2003/10/14 · openalex publication_date 2004/02/26 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04
Using a sample of 88.8\ifmmode×\else\texttimes\fi106 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\ensuremath→D0\ensuremathπ0)=[2.9\ifmmode±\else\textpm\fi0.2(stat)\ifmmode±\else\textpm\fi0.3(syst)]\ifmmode×\else\texttimes\fi10^\ensuremath-4, B(B0\ensuremath→D*0\ensuremathπ0)=[2.9\ifmmode±\else\textpm\fi0.4(stat)\ifmmode±\else\textpm\fi0.5(syst)]\ifmmode×\else\texttimes\fi10^\ensuremath-4, B(B0\ensuremath→D0\ensuremathη)=[2.5\ifmmode±\else\textpm\fi0.2(stat)\ifmmode±\else\textpm\fi0.3(syst)]\ifmmode×\else\texttimes\fi10^\ensuremath-4, B(B0\ensuremath→D*0\ensuremathη)=[2.6\ifmmode±\else\textpm\fi0.4(stat)\ifmmode±\else\textpm\fi0.4(syst)]\ifmmode×\else\texttimes\fi10^\ensuremath-4, B(B0\ensuremath→D0\ensuremathω)=[3.0\ifmmode±\else\textpm\fi0.3(stat)\ifmmode±\else\textpm\fi0.4(syst)]\ifmmode×\else\texttimes\fi10^\ensuremath-4, B(B0\ensuremath→D*0\ensuremathω)=[4.2\ifmmode±\else\textpm\fi0.7(stat)\ifmmode±\else\textpm\fi0.9(syst)]\ifmmode×\else\texttimes\fi10^\ensuremath-4, and B(B0\ensuremath→D0\ensuremathη^\ensuremath')=[1.7\ifmmode±\else\textpm\fi0.4(stat)\ifmmode±\else\textpm\fi0.2(syst)]\ifmmode×\else\texttimes\fi10^\ensuremath-4. We set the 90% confidence-level upper limit: B(B0\ensuremath→D*0\ensuremathη^\ensuremath')<2.6\ifmmode×\else\texttimes\fi10^\ensuremath-4. The channels B0\ensuremath→D*0\ensuremathη, D*0\ensuremathω, and D0\ensuremathη^\ensuremath' 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.