Observation of $B^{+}\to ωK^{+}$ and Search for Related $B$ Decay Modes

Abstract

We have searched for two-body charmless decays of B mesons to purely hadronic exclusive final states including $ω$ or $ϕ$ mesons using data collected with the CLEO II detector. With this sample of $6.6 \times 10^6$ B mesons we observe a signal for the $ωK^+$ final state, and measure a branching fraction of B($B^+ \to ωK^+$) = 1.5 +0.7 -0.6 +-0.2 $\times 10^{-5}$. We also observe some evidence for the $ϕK^*$ final state, and upper limits are given for 22 other decay modes. These results provide the opportunity for studies of theoretical models and physical parameters.