Measurements of the branching fractions of exclusive charmless B meson decays with $\eta^prime$ or $\omega$ mesons

TL;DR

This paper reports measurements of branching fractions for specific charmless B meson decays involving eta prime or omega mesons, providing new experimental data and upper limits based on BABAR detector observations.

Contribution

First measurements of branching fractions for certain B decays to eta prime or omega mesons, with detailed statistical and systematic uncertainties.

Findings

Measured ${ m B}(B^+ o ext{eta'}K^+)$ as (70±8±5)×10^{-6}

Set upper limits on ${ m B}(B^0 o ext{omega}K^0)$ and others

Provided new experimental data on charmless B decay modes.

Abstract

We present the results of searches for B decays to charmless two-body final states containing $\eta^\prime$ or $\omega$ mesons, based on 20.7 fb$^{-1}$ of data collected with the BABAR detector. We find the branching fractions ${\cal B}(B^+\to\eta^\prime K^+) = (70\pm 8\pm 5)\times 10^{-6}$, ${\cal B}(B^0\to\eta^\prime K^0) = (42^{+13}_{-11}\pm 4)\times 10^{-6}$, and ${\cal B}(B^+\to\omega\pi^+)=6.6^{+2.1}_{-1.8}\pm 0.7)\times 10^{-6}$ where the first error quoted is statistical and the second systematic. We give measurements of four additional modes for which the 90% confidence level upper limits are ${\cal B}(B^0\to\omega K^0) < 13\times 10^{-6}$, ${\cal B}(B^+\to\eta^\prime \pi^+) < 12\times 10^{-6}$, ${\cal B}(B^+\to \omega K^+) < 4\times 10^{-6}$, and ${\cal B}(B^0\to\omega\pi^0) < 3\times 10^{-6}$.