Branching fraction and $CP$-violation charge asymmetry measurements for $B$-meson decays to $\eta K^{\pm }$, $\eta {\pi }^{\pm }$, ${\eta }^{\prime }K$, ${\eta }^{\prime }{\pi }^{\pm }$, $\omega K$, and $\omega {\pi }^{\pm }$

We present measurements of the branching fractions for $B^0$-meson decays to ${\eta }^{\prime }{K}^0$ and $\omega K^0$, and of the branching fractions and $CP$-violation charge asymmetries for $B^{+}$-meson decays to $\eta {\pi }^{+}$, $\eta K^{+}$, ${\eta }^{\prime }{\pi }^{+}$, ${\eta }^{\prime }{K}^{+}$, $\omega {\pi }^{+}$, and $\omega K^{+}$. The data, collected with the BABAR detector at the Stanford Linear Accelerator Center, represent $383\times {10}^6$ $B\overline{B}$ pairs produced in $e^{+}{e}^{-}$ annihilation. The measurements agree with previous results; we find no evidence for direct $CP$ violation.

Figure 1

Plots of signal-enhanced subsets of the data distribution for $B^{+}\to \omega K^{+}$ projected on each of the fit variables: (a) $m_{\mathrm{ES}}$, (b) $\Delta E$, (c) $\mathcal{F}$, (d) ${\mathcal{H}}^{\omega }$, (e) $\omega$ mass, and (f) $S_{\pi }$. Points with errors represent the data, solid curves the full fit functions, dashed curves the sum of the background functions, and dot-dashed curves the signal from $B^{+}\to \omega {\pi }^{+}$. The variable $\Delta E$ is computed with the pion mass.

Figure 2

Plots of signal-enhanced subsets of the data distributions projected onto $m_{\mathrm{ES}}$ for the decays: (a) $B^{+}\to \eta {\pi }^{+}$, (b) $B^{+}\to \eta K^{+}$, (c) $B^{+}\to {\eta }^{\prime }{\pi }^{+}$, (d) $B^{+}\to {\eta }^{\prime }{K}^{+}$, (e) $B^0\to {\eta }^{\prime }{K}^0$, (f) $B^{+}\to \omega {\pi }^{+}$, (g) $B^{+}\to \omega K^{+}$, and (h) $B^0\to \omega K^0$. The solid line represents the result of the fit, and the dot-dashed line the background contribution. The dashed line gives the sum of background and the ${\eta }_{3\pi }$ [(a), (b)] or ${\eta }_{\eta \pi \pi }^{\prime }$ [(c)–(e)] component of the signal. The dotted line shows the $K$ or $\pi$ cross-feed component, where applicable.