2003/04/25 by S. K. Swain, T. E. Browder, K. Abe +94 · 1 citation
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.68.051101
published as Phys.Rev.D68:051101,2003 · 10 pages, 3 figures, submitted to Physical Review D
arxiv created 2003/04/25 · openalex publication_date 2003/09/10 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We report results on the decay B^\ensuremath-\ensuremath→DCPK^\ensuremath- and its charge conjugate using a data sample of 85.4\ifmmode×\else\texttimes\fi106 BB pairs recorded at the \ensuremathΥ(4S) resonance with the Belle detector at the KEKB asymmetric e+e^\ensuremath- storage ring. Ratios of branching fractions of Cabibbo-suppressed to Cabibbo-favored processes are determined to be B(B^\ensuremath-\ensuremath→D0K^\ensuremath-)/B(B^\ensuremath-\ensuremath→D0\ensuremathπ^\ensuremath-)=0.077\ifmmode±\else\textpm\fi0.005(stat)\ifmmode±\else\textpm\fi0.006(syst), B(B^\ensuremath-\ensuremath→D1K^\ensuremath-)/B(B^\ensuremath-\ensuremath→D1\ensuremathπ^\ensuremath-)=0.093\ifmmode±\else\textpm\fi0.018(stat)\ifmmode±\else\textpm\fi0.008(syst) and B(B^\ensuremath-\ensuremath→D2K^\ensuremath-)/B(B^\ensuremath-\ensuremath→D2\ensuremathπ^\ensuremath-)=0.108\ifmmode±\else\textpm\fi0.019(stat)\ifmmode±\else\textpm\fi0.007(syst) where the indices 1 and 2 represent the CP=+1 and CP=\ensuremath-1 eigenstates of the D0\ensuremath-D0 system, respectively. We find the partial-rate charge asymmetries for B^\ensuremath-\ensuremath→DCPK^\ensuremath- to be A1=0.06\ifmmode±\else\textpm\fi0.19(stat)\ifmmode±\else\textpm\fi0.04(syst) and A2=\ensuremath-0.19\ifmmode±\else\textpm\fi0.17(stat)\ifmmode±\else\textpm\fi0.05(syst).