Searches for<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>B</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:math>Decays to Combinations of Two Charmless Isoscalar Mesons
Searches for<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>B</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:math>Decays to Combinations of Two Charmless Isoscalar Mesons
We search for $B$ meson decays into two-body combinations of $\ensuremath{\eta},{\ensuremath{\eta}}^{\ensuremath{'}},\ensuremath{\omega}$, and $\ensuremath{\phi}$ mesons from $89\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $B\overline{B}$ pairs collected with the BABAR detector at the PEP-II asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider at SLAC. We find the branching fraction $\mathcal{B}({B}^{0}\ensuremath{\rightarrow}\ensuremath{\eta}\ensuremath{\omega})=({4.0}_{\ensuremath{-}1.2}^{+1.3}\ifmmode\pm\else\textpm\fi{}0.4)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6}$ with a significance of $4.3\ensuremath{\sigma}$. For the other decay modes we set the …