Charmless Quasi-Two Modes at Babar

We present results for measurements of B⁰ meson decays to charmless final states ηK⁰, ηω, a_{1⁺(1260)π ^-} with a_0⁺(1260) -> π ^{+π ^+π ^-}, ρ ⁰K_S⁰, K_{S⁰K_S⁰K_S⁰}, and of B⁺ to ηρ⁺ and η'π⁺. Analyses are based on data taken with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. We measure the following branching fractions in units of 10^-6: ℬ(B⁰ → ηω) = 1.2±0.6±0.2(< 2.1, 90% C.L.), ℬ(B⁰ → ηK⁰) = 2.5±0.8±0.1, ℬ(B⁺ → ηρ⁺) = 8.6±2.2±1.1, ℬ(B⁺ → η'π⁺) = 4.2±1.0±0.5, {B}(B⁰ -> a_{1⁺(1260)π ^-)} = 42.6 ± 4.2 ± 4.1, ℬ(B⁰ → ρ⁰K⁰) = 5.1±1.0±1.2, and {B}(B⁰ -> K_{S⁰K_S⁰K_S⁰⁾} = 6.5 ± 0.8 ± 0.8. The charge asymmetries are mathfrak{A}_{ch}(mathfrak{B}(B^+ to etarho^+)) = (7 pm 19 pm 2)% and mathfrak{A}_{ch}(mathfrak{B}(B^+ to etaprimepi^+)) = (24 pm 19 pm 1)%. First error is statistical, the second systematic. All results are preliminary.