Abstract
We study bottomonium production in association with an eta meson in e^+e^- annihilations near the varUpsilon (5S), at a centre-of-mass energy of sqrt{s}=10.866 GeV. The results are based on the 121.4 fb^{-1} data sample collected by the Belle experiment at the asymmetric-energy KEKB collider. Only the eta meson is reconstructed and the missing-mass spectrum of eta candidates is investigated. We observe the e^+e^-rightarrow eta varUpsilon _J(1D) process and find evidence for the e^+e^-rightarrow eta varUpsilon (2S) process, while no significant signals of varUpsilon (1S), h_b(1P), nor h_b(2P) are found. Cross sections for the studied processes are reported.
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