Studies of the Decay B±→DCPK±

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ID: 272842
2003
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Abstract
We report studies of the Cabibbo-suppressed decay ${B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{D}_{CP}{K}^{\ifmmode\pm\else\textpm\fi{}}$, where ${D}_{CP}$ denotes $CP$ eigenstates of the ${D}^{0}\ensuremath{-}\overline{{D}^{0}}$ system. The analysis is based on a $29.1\text{ }\mathrm{f}{\mathrm{b}}^{\mathrm{\ensuremath{-}}\mathrm{1}}$ sample collected at the $\ensuremath{\Upsilon}(4S)$ resonance with the Belle detector at the KEKB asymmetric ${e}^{+}{e}^{\ensuremath{-}}$ storage ring. We measure ratios of branching fractions, relative to Cabibbo-favored ${B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{D}_{CP}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$, of $\mathcal{B}({B}^{\ensuremath{-}}\ensuremath{\rightarrow}{D}_{1}{K}^{\ensuremath{-}})/\phantom{\rule{0ex}{0ex}}\mathcal{B}({B}^{\ensuremath{-}}\ensuremath{\rightarrow}{D}_{1}{\ensuremath{\pi}}^{\ensuremath{-}})=0.125\ifmmode\pm\else\textpm\fi{}0.036\ifmmode\pm\else\textpm\fi{}0.010$ and $\mathcal{B}({B}^{\ensuremath{-}}\ensuremath{\rightarrow}{D}_{2}{K}^{\ensuremath{-}})/\mathcal{B}({B}^{\ensuremath{-}}\ensuremath{\rightarrow}{D}_{2}{\ensuremath{\pi}}^{\ensuremath{-}})=0.119\ifmmode\pm\else\textpm\fi{}0.028\ifmmode\pm\else\textpm\fi{}0.006$; the index 1 (2) denotes the $CP=+1$ $(\ensuremath{-}1)$ eigenstate. We also extract the partial rate asymmetries for ${B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{D}_{CP}{K}^{\ifmmode\pm\else\textpm\fi{}}$, finding ${\mathcal{A}}_{1}=0.29\ifmmode\pm\else\textpm\fi{}0.26\ifmmode\pm\else\textpm\fi{}0.05$ and ${\mathcal{A}}_{2}=\ensuremath{-}0.22\ifmmode\pm\else\textpm\fi{}0.24\ifmmode\pm\else\textpm\fi{}0.04$.
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2003physicalstudies Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors
Journal physical review letters
Year 2003
DOI
doi:10.1103/PhysRevLett.90.131803
URL
https://doi.org/10.1103/physrevlett.90.131803
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