| Abstract |
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We search for B meson decays into two-body combinations of eta, eta',
omega, and phi mesons from 89 million B B-bar pairs
collected with the BaBar detector at the PEP-II asymmetric-energy
e+e- collider at SLAC. We find the branching fraction BF(B0 -> eta omega)
= ( 4.0^{+1.3}_{-1.2} +- 0.4) x 10^-6 with a significance of 4.3 sigma.
For all the other decay modes we set the following 90% confidence level
upper limits on the branching fractions, in units of 10^-6 :
BF(B0 -> eta eta)<2.8, BF(B0 -> eta eta')<4.6, BF(B0 -> eta' eta')<10,
BF(B0 -> eta' omega)<2.8, BF(B0 -> eta phi)<1.0, BF(B0 -> eta' phi)<4.5,
BF(B0 -> phi phi)<1.5.
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