Observation of Exclusive \bar B --> D^(*)K*^- Decays
Abstract
We report the first observation of the exclusive decays \bar B\to D^{(*)}K*^-, using 9.66 x 10^{6} B\bar{B} pairs collected at the \Upsilon(4S) with the CLEO detector. We measure the following branching fractions: {\cal B}(B^- --> D^0 K*^-)=(6.1 +- 1.6 +- 1.7) x 10^{-4}, {\cal B}(\bar{B^0}--> D^+K*^-)=(3.7 +- 1.5 +- 1.0) x 10^{-4}, {\cal B}(\bar{B^0}--> D*^+K*^-)=(3.8 +- 1.3 +- 0.8) x 10^{-4} and {\cal B}(B^- --> D*^0 K*^-)=(7.7 +- 2.2 +- 2.6) x 10^{-4}. The \bar B --> D^*K*^- branching ratios are the averages of those corresponding to the 00 and 11 helicity states. The errors shown are statistical and systematic, respectively.Keywords
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