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Search for transitions from Upsilon(4S) and Upsilon(5S) to η_b(1S) and η_b(2S) with emission of an ω meson
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arxiv 2009.11720 v1 pith:KQAJBGMM submitted 2020-09-24 hep-ex
Search for transitions from Upsilon(4S) and Upsilon(5S) to η_b(1S) and η_b(2S) with emission of an ω meson
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Using data collected in the Belle experiment at the KEKB asymmetric-energy $e^+e^-$ collider we search for transitions $\Upsilon(4S) \rightarrow \eta_b(1S)\omega$, $\Upsilon(5S) \rightarrow \eta_b(1S)\omega$ and $\Upsilon(5S) \rightarrow \eta_b(2S)\omega$. No significant signals are observed and we set 90\% confidence level upper limits on the corresponding visible cross sections: $0.2 ~\textrm{pb}, 0.4 ~\textrm{pb}$ and $1.9 ~\textrm{pb}$, respectively.
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