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Search for eta_b(1S) in Inclusive Radiative Decays of the Upsilon(3S)

A. H. Mahmood·CLEO Collaboration
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Abstract

We have searched for the bottomonium eta_b(1S) via the hindered magnetic dipole (M1) photon transition Upsilon(3S) -> gamma eta_b(1S). No evidence for such a transition is found in the data sample of 4.7 x 10^6 Upsilon(3S)'s collected with the CLEO-III detector. We set upper limits on the branching ratio from 9.30 to 9.43 GeV/c^2 of eta_b(1S) masses. These upper limits rule out many previously published phenomenological estimates of the rate for this transition.

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A. H. Mahmood, CLEO Collaboration. 2002-07-24. Search for eta_b(1S) in Inclusive Radiative Decays of the Upsilon(3S). https://arxiv.org/abs/hep-ex/0207057

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