Search for transitions from <math><mi>ϒ</mi><mo>(</mo><mn>4</mn><mi>S</mi><mo>)</mo></math> and <math><mi>ϒ</mi><mo>(</mo><mn>5</mn><mi>S</mi><mo>)</mo></math> to <math><msub><mi>η</mi><mi>b</mi></msub><mo>(</mo><mn>1</mn><mi>S</mi><mo>)</mo></math> and <math><msub><mi>η</mi><mi>b</mi></msub><mo>(</mo><mn>2</mn><mi>S</mi><mo>)</mo></math> with emission of an <math><mi>ω</mi></math> meson

Using data collected in the Belle experiment at the KEKB asymmetric-energy e+e− collider we search for transitions ϒ(4S)→ηb(1S)ω, ϒ(5S)→ηb(1S)ω and ϒ(5S)→ηb(2S)ω. No significant signals are observed and we set 90% confidence level upper limits on the corresponding visible cross sections: 0.2 pb, 0.4 pb and 1.9 pb, respectively.