Search for $B$ meson decays to ${\eta }^{\prime }{\eta }^{\prime }K$

We describe searches for decays of $B$ mesons to the charmless final states ${\eta }^{\prime }{\eta }^{\prime }K$. The data consist of $228\times {10}^6$ $B\overline{B}$ pairs produced in $e^{+}{e}^{-}$ annihilation, collected with the BABAR detector at the Stanford Linear Accelerator Center. The 90% confidence level upper limits for the branching fractions are $\mathcal{B}(B^0\to {\eta }^{\prime }{\eta }^{\prime }{K}^0)<31\times {10}^{-6}$ and $\mathcal{B}(B^{+}\to {\eta }^{\prime }{\eta }^{\prime }{K}^{+})<25\times {10}^{-6}$.

Figure 1

The $B$ candidate $m_{\mathrm{ES}}$ and $\Delta E$ projections for ${\eta }^{\prime }{\eta }^{\prime }{K}^{+}$ (a), (b) and ${\eta }^{\prime }{\eta }^{\prime }{K}_S^0$ (c), (d) for the combined subdecay modes. Points with errors represent the data, solid curves the full fit functions and dashed curves the background functions. These plots are made with a requirement on the likelihood and thus do not show all events in the data samples.

Figure 2

The likelihood ratio L(Sg)/[L(Sg)+ L(Bg)] for the subdecay modes of ${\eta }^{\prime }{\eta }^{\prime }K$: (a) ${\eta }_{\eta \pi \pi }^{\prime }{\eta }_{\rho \gamma }^{\prime }{K}^{+}$, (b) ${\eta }_{\eta \pi \pi }^{\prime }{\eta }_{\eta \pi \pi }^{\prime }{K}^{+}$, (c) ${\eta }_{\eta \pi \pi }^{\prime }{\eta }_{\rho \gamma }^{\prime }{K}_S^0$, (d) ${\eta }_{\eta \pi \pi }^{\prime }{\eta }_{\eta \pi \pi }^{\prime }{K}_S^0$. The on-resonance data are shown as points with error bars; the sum of all simulated background samples is shown by the shaded (dashed line) histograms; and the sum of these backgrounds plus the signal from the PDF model are given by the open (solid line) histograms.