Observation of the Hadronic Transitions chib1,2 (2P) --> omega Upsilon(1S)
D. Cronin-Hennessy, CLEO Collaboration
Abstract
The CLEO Collaboration has made the first observations of hadronic transitions among bottomonium (b-bbar) states other than the dipion transitions among upsns states. In our study of Y(3S) decays, we find a significant signal for Y(3S) -> gamma omega Y(1S) that is consistent with radiative decays Y(3S) -> gamma chib1,2(2P), followed by chib1,2(2P) -> omega Y(1S). The branching ratios we obtain are B(chib1(2P) -> omega Y(1S)) = (1.63 +0.35-0.31 +0.16-0.15)% and B(chib2(2P) -> omega Y(1S)) = (1.10 +0.32-0.28 +0.11-0.10)%, in which the first error is statistical and the second is systematic.
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