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

TL;DR

This paper reports the observation of the decay mode B+ to omega K+ and provides measurements and limits for various charmless B meson decays, aiding theoretical understanding of these processes.

Contribution

First observation of B+ to omega K+ decay and measurement of its branching fraction, along with evidence for phi K* and limits for other modes.

Findings

Observed B+ to omega K+ decay with branching fraction ~1.5 x 10^-5

Evidence found for phi K* decay mode

Set upper limits for 22 other decay modes

Abstract

We have searched for two-body charmless decays of B mesons to purely hadronic exclusive final states including $\omega$ or $\phi$ 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 $\omega K^+$ final state, and measure a branching fraction of B($B^+ \to \omega K^+$) = 1.5 +0.7 -0.6 +-0.2 $\times 10^{-5}$. We also observe some evidence for the $\phi K^*$ 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.