  We present measurements of branching fractions for four previously unobserved
B-meson decays with an eta or eta' meson in the final state. The data sample
corresponds to 182 million B-Bbar pairs produced from e+e- annihilation at the
Upsilon(4S) resonance. We measure the following branching fractions in units of
10^-6: BF(B0 -> eta omega) = 1.2 +/- 0.6 +/- 0.2 (<2.3 at 90% C.L.), BF(B0 ->
eta K0) = 2.5 +/-0.8 +/- 0.1, BF(B+ -> eta rho+) = 8.6 +/- 2.2 +/- 1.1, and
BF(B+ -> eta' pi+) = 4.2 +/- 1.0 +/- 0.5, where the first error quoted is
statistical and the second systematic. The charge asymmetries are A_ch(B+ ->
eta rho+) = (7 +/- 19 +/- 2)% and A_ch(B+ -> eta' pi+) = (24 +/- 19 +/- 1)%.
All results are preliminary.

High Energy Physics - Experiment