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Article

Search for transitions from Υ(4S) and Υ(5S) to ηb(1S) and ηb(2S) with emission of an ω meson

Mizuk R., Аушев Т. А., Pakhlov P., Pakhlova G., Попов В. Е., Углов Т. В.

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.