Search for the Rare Decays B+→D(∗)+Ks0B^+ \to D^{(*)+} K^0_{s}

We report on the search for the rare decays $B^+ \to D^{(*)+} K^0_{s}$ in approximately 226 million $Y(\rm 4S)\to b\bar{B}$ decays collected with the BaBar detector at the PEP-II asymmetric-energy $B$ factory at SLAC. We do not observe any significant signal and we set 90% confidence level upper limits on the branching fractions, {\ensuremath {{\cal B}(\Bp{\to}D^{+}K^0})} $<0.5 \times 10^{-5}$ and {\ensuremath {{\cal B}(\Bp{\to}D^{*+}K^0})} $<0.9 \times 10^{-5}$