Search for etab(1S) in Inclusive Radiative Decays of the Upsilon(3S)
Abstract
We have searched for the bottomonium etab(1S) via the hindered magnetic dipole (M1) photon transition Upsilon(3S) -> gamma etab(1S). No evidence for such a transition is found in the data sample of 4.7 x 106 Upsilon(3S)'s collected with the CLEO-III detector. We set upper limits on the branching ratio from 9.30 to 9.43 GeV/c2 of etab(1S) masses. These upper limits rule out many previously published phenomenological estimates of the rate for this transition.
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