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Measurement of the branching fraction for psi(3686) -> omega K+K-
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2014 (English)In: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 89, no 11, 112006- p.Article in journal (Refereed) Published
Abstract [en]

With 1.06 x 10(8) psi(3686) events collected with the BESIII detector, the branching fraction of psi(3686) -> omega K+K- is measured to be (1.54 +/- 0.04 +/- 0.11) x 10(-4). This is the most precise result to date, due to the largest psi(3686) sample, improved signal reconstruction efficiency, good simulation of the detector performance, and a more accurate knowledge of the continuum contribution. Using the branching fraction of J/psi -> omega K+K-, the ratio B(psi(3868) -> K+K-)/B(J/psi -> K+K-) is determined to be (18.4 +/- 3.7)%. This constitutes a significantly improved test of the 12% rule, with the uncertainty now dominated by the J/psi branching fraction.

Place, publisher, year, edition, pages
2014. Vol. 89, no 11, 112006- p.
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Physical Sciences
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URN: urn:nbn:se:uu:diva-229744DOI: 10.1103/PhysRevD.89.112006ISI: 000338642100002OAI: oai:DiVA.org:uu-229744DiVA: diva2:738304
Available from: 2014-08-18 Created: 2014-08-12 Last updated: 2017-12-05Bibliographically approved

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Johansson, TordKupsc, AndrezejSchönning, KarinWolke, Magnus

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