Observation of Exclusive barB --> D(*) K*- Decays

TL;DR

This paper reports the first observation of specific exclusive B meson decays to D(*) and K*-, measuring their branching fractions with data from the CLEO detector, confirming these decay modes experimentally.

Contribution

It provides the first experimental evidence and precise measurements of the branching fractions for ar B o D^{(*)}K^{*-} decays, expanding knowledge of B meson decay channels.

Findings

First observation of ar B o D^{(*)}K^{*-} decays.

Measured branching fractions for four decay modes.

Branching ratios are consistent with theoretical expectations.

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)x10^{-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.