A New Measurement of {eta}{sub b}(1S) From {Upsilon}(3S) Radiative Decay at CLEO

Journal Article · Thu Aug 05 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3483457· OSTI ID:21426423

Dobbs, Sean ^[1]

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1. Northwestern University, Evanston, IL 60208 (United States)

Using CLEO data, we report on the confirmation of the {eta}{sub b}({sup 1}S{sub 0}) ground state of bottomonium in the radiative decay {Upsilon}(3S){yields}{gamma}{eta}{sub b} We determine its mass to be M({eta}{sub b}) = 9391.8{+-}6.6{+-}2.1 MeV, which corresponds to the hyperfine splitting {Delta}M{sub hf}(1S) = 68.5{+-}6.6{+-}2.0 MeV, and the branching fraction B({Upsilon}(3S){gamma}{eta}{sub b}) = (7.1{+-}1.8{+-}1.1)x10{sup -4}. These results agree with those previously reported by BaBar.

• OSTI ID: 21426423
• Journal Information: AIP Conference Proceedings, Vol. 1257, Issue 1; Conference: HADRON 2009: 13. international conference on hadron spectroscopy, Tallahassee, FL (United States), 29 Nov - 4 Dec 2009; Other Information: DOI: 10.1063/1.3483457; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

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